NVD-N Requirements Formulation Matrix and Perf Spec Tracking 20230510.xlsb.xlsx
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- Attached to
- Night Vision Device - Next (NVD-N) Federal contract opportunity
- Solicitation number
- W91CRB-23-NVDN
About this file
This document outlines technical requirements for a Night Vision Device - Next (NVD-N) system. The NVD-N is a binocular night vision goggle intended for close combat support personnel. The requirements cover safety and human factors, interoperability, serviceability, and user interface considerations. Key thresholds include a maximum mass of 904 grams, battery life of at least 8 hours, compatibility with Army helmets and mounts, replacement of sacrificial windows and filters by users without tools, and adjustment of focus, diopter, interpupillary distance, position, and on/off functions under defined force limits using gloves. Successful offerors must demonstrate the NVD-N design meets each threshold and addresses additional desired attributes around manpower, training, safety, health hazards and soldier survivability. The related pre-solicitation lists the solicitation number and agency as the Department of the Army seeking to procure the NVD-N system.
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| NVD-N RFI Questions RSD Answers.xlsx | XLSX spreadsheet | |
| RFI QA.docx | DOCX document |
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Workbook Overview
| Document Title | |
| NVD-N Requirements Formulation Matrix YYYYMMDD.xlsx | |
| Current Version | |
| 20230510 |
| Document Versions | |
| Until a formal release of the NVD Performance Specification, versioning control of this document is managed by PM SMS NVD-N Project Management. | |
| Document Description | |
| This document captures NVD-N requirements in workbook matrix format. The requirements are grouped in categories to facilitate heuristic searches by the reader when the specific requirement title may not be known. The requirements in each major category are collected within the worksheet with the category name. This document will be utilized as the primary source for the formal government release of the NVD-N Performance Specification. The requirements within this document are referenced by an alpha-numeric identifier based on the category letter (A-G) and a number to identify the requirement within its category. Figures and Tables are also included in this document for clarification and accessed as separate workbook tabs with the Letter-Number designation of the requirement to which is referenced first. At the release of the NVD-N Performance Speciation, each of the requirements, figures and tables herein will be cross-referenced to the NVD-N Performance Specification paragraph number. | |
| Disclaimer | |
| The requirements, figures and tables contained in this matrix are subject to change without notice. During the initial requirements formulation process, requirements may be deleted, added or modified before becoming part of the formal NVD-N Performance Specification. | |
| Capability Development Strategy | |
| NVD-N is a unit cost driven development for a binocular night vision device to enable close combat support personnel with the capability to maintain the same operational tempo of the combat force. As much as feasible within the system's unit cost goal, the NVD-N should utilize a strategic Modular Open System Architecture (MOSA) approach to incorporate advanced capabilities and minimize average unit cost. In addition, the Materiel Developer (MATDEV) will ensure that all systems maintenance tasks are designed to be performed by field-level maintenance Soldiers, or equivalent, in the forward battlefield area. MATDEV will ensure that all maintenance-task designs support the Multi-Domain Operations (MDO) and ensure that the maintenance design is interoperable with existing-organic capabilities in the forward battlefield operations. | |
| Other System Attributes (desired attributes not specified in the requirements matrix) | |
| Manpower. No additional personnel are required to operate the system. |
Personnel capabilities. The human aptitudes, skills, and capabilities required to operate, and maintain, support of Army systems in peacetime and war shall not be increased as a result of the introduction of the NVD-N.
Training. The instruction and resources required to provide the Warfighter and maintainer with knowledge, skills, and abilities to properly operate, maintain, and support Army systems shall not be significantly increased as a result of the introduction of the NVD-N.
Human factors engineering. The NVD-N design shall promote effective soldier-machine integration for optimal total system performance. Human capabilities and limitations shall be incorporated into system.
System safety. The NVD-N design and operational characteristics shall minimize the possibilities for accidents or mishaps caused by human error or system failure.
Health hazards. Through the systematic application of biomedical knowledge to identify, assess, and minimize health hazards associated with the system's operation, maintenance, repair or storage, the NVD-N shall not present any uncontrolled health hazards to the operator or maintainer through its service lifetime.
Soldier survivability. The NVD-N system will increase survivability of the individual combat Solider by providing CCF-DS with a night vision system that has the ability to maintain the OPTEMPO that CCF requires while they are moving faster and executing missions more efficiently with the use of ENVG-B or IVAS systems. NVD-N enables CCF-DS with increased depth perception, higher clarity, and improved recognition in all low-level light conditions compared to their current PVS-7 and PVS-14 systems.
Applicable Documents
| Appicable External Documents | |||
| Document ID | Title | Document Number | Revision |
| ED1 | ENVG-B Performance Specification | ||
| ED2 | PVS-14 Performance Specification | ||
| ED3 | ANVIS Performance Specification | ||
| ED4 | Image Tube Performance Specification | ||
| ED5 | NVG Shroud | A3256368 | |
| ED6 | Laser Interference Filter | 5009738 | |
| ED7 | Sacrificial Window, Eyepiece | A3256353 | |
| ED8 | Sacrificial Window, Objective | A3144264 | |
| ED9 | AN/PEQ-15 Performance Specification | ||
| ED10 | PEQ-2A Performance Specification | ||
| ED11 | PSQ-23 Performance Specification | ||
| ED12 | |||
| ED13 | |||
| ED14 | |||
| ED15 | |||
| ED16 | |||
| ED17 | |||
| ED18 | |||
| ED19 |
Defintion of Terms
| Definition of Terms | |||||
| Term ID | Term | Definition | Figure | Requirement Reference | Perf Spec |
| TT1 | Damage | 3.4.1 | |||
| TT2 | Degradation of Performance | 3.4.2 | |||
| TT3 | Interchangeability | 3.4.3 | |||
| TT4 | Objective space | The physical space external to the system in which points at finite and infinite physical or apparent distances from the system objective lens vertex and from which the system objective lens can form a real image on a spatially readable photo-sensitive device. | 3.4.4 | ||
| TT5 | Instantaneous objective space | The subset of points in the objective space that have a one-to one correspondence with every readable point on the readable photo-sensitive device at any instant in time. | 3.4.5 | ||
| TT6 | Entrance pupil | The single physical or apparent opening in a plane parallel to the system x-y plane which constrains to the same projected solid angle the light emitted by every point in instantaneous objective space that is equidistant from the objective lens. | 3.4.6 | ||
| TT7 | Ocular Space | The non-physical space consisting of the virtual images of points formed by the system ocular lens at finite or infinite apparent distances from the ocular vertex and into which the system ocular lens can project a virtual image of a spatially writable photo-emissive device. | 3.4.7 | ||
| TT8 | Instantaneous ocular space | The subset of all points in ocular space that have a one-to-one correspondence with every writeable point of the spatially addressable photo-emissive device at any instant in time. | 3.4.8 | ||
| TT9 | Optical field point | Any point in the instantaneous objective space which has a one-to-one correspondence to a point in instantaneous ocular space. | 3.4.9 | ||
| TT10 | Areal Field of view | The locus of all optical field points | 3.4.10 | ||
| TT11 | Field boundary point | Any optical field point in objective space for which an adjacent point can be found that is not an optical field point. | 3.4.11 | ||
| TT12 | Field boundary | The locus of all field boundary points. | 3.4.12 | ||
| TT13 | Viewable Volume Element | The light ray bundle generated by one of the writable elements of the photo-emissive device that is limited by and transmitted by the system ocular. | 3.4.13 | ||
| TT14 | Eye box | A volume made up of the intersection of all viewable volume elements | 3.4.14 | ||
| TT15 | Exit pupil | The areal planar region of intersection of the eye box by a plane parallel to the system x-y plane at a specified distance along the optical axis between the ocular vertex and the plane of intersection. | 3.4.15 | ||
| TT16 | Eye relief | The linear distance along the optical axis between the ocular vertex and an exit pupil plane in which the exit pupil area meets a minimum area criterion. | 3.4.16 | ||
| TT17 | Sample Aperture | The open aperture of a test or measurement device that can be placed coplanar to a specified exit pupil. | 3.4.17 | ||
| TT18 | Centered sample aperture | A sample aperture in which the geometric center of the sample aperture coincides with the optical axis. | 3.4.18 | ||
| TT19 | De-centered sample aperture | A sample aperture in which the geometric center of the sample aperture is translated in a specified direction in the x-y plane by a non-zero distance from the optical axis. | 3.4.19 | ||
| TT20 | Objective/ocular space optical field vector | The imaginary straight line passing through the geometric center of the entrance pupil/ exit pupil or sample aperture and extending to the field point in objective/ ocular space that corresponds to a specified objective/ocular space field point. | 3.4.20 | ||
| TT21 | Objective/ocular optical axis | The optical field vector for the objective/ocular space field point at the geometric center of the areal field of view | 3.4.21 | ||
| TT22 | Optical radiant | An imaginary straight line perpendicular to and originating at the optical axis. | 3.4.22 | ||
| TT23 | Absolute field angle coordinate | The absolute length of an optical radiant that terminates at a specific field point measured in angular units. | 3.4.23 | ||
| TT24 | Objective space horizon | The imaginary line that contains the optical radiants parallel to the system x axis (see Figure 3) | A1 | 3.4.24 | |
| TT25 | Ocular space horizon | The locus of points in virtual space corresponding to the locus of points of the objective space horizon. | 3.4.25 | ||
| TT26 | Objective space meridian | The imaginary line that contains the optical radiants parallel to the system y axis (see Figure 3) | A1 | 3.4.26 | |
| TT27 | Ocular space meridian | The locus of points in virtual space corresponding to the locus of points of the objective space meridian. | 3.4.27 | ||
| TT28 | Objective/ocular space horizontal field of view | The angular span between opposing field boundary points of the objective/ocular space horizon. | 3.4.28 | ||
| TT29 | Objective/ocular space vertical field of view | The angular span between the opposing field boundary points of the objective/ocular space meridian. | 3.4.29 | ||
| TT30 | Optical Aspect | The ratio of the vertical field of view to the horizontal field of view | 3.4.30 | ||
| TT31 | Optical magnification | The ratio between an ocular space absolute field angle coordinate and the objective space absolute field angle coordinate for a given optical field point. | 3.4.31 | ||
| TT32 | Optical distortion | Optical magnification that varies for different optical field points measured as the percent change in magnification at a specific field point with reference to the optical magnification at a fixed specified optical field point . | 3.4.32 | ||
| TT33 | Normalized field angle coordinate | The absolute field angle coordinate divided by one-half the horizontal field of view. | 3.4.33 | ||
| TT34 | Paraxial field angle | Any object/ocular space normalized field angles between 0 and 0.1. | 3.4.34 | ||
| TT35 | Mid-peripheral field angle | Any object/ocular space normalized field angles between 0.1 and 0.7. | 3.4.35 | ||
| TT36 | Peripheral field angle | Any object/ocular space normalized field angles between 0.7 and 1.0 | 3.4.36 | ||
| TT37 | Optical misalignment | A condition in which the optical field vectors in ocular space for two monoculars in a binocular system for the same optical field point are not parallel. | 3.4.37 | ||
| TT38 | Divergence | An optical misalignment in which optical field vectors projected into the x-y plane have an intersection in the negative z region. | A1 | 3.4.38 | |
| TT39 | Convergence | An optical misalignment in which optical field vectors projected into the x-y plane have an intersection in the positive z region. | A1 | 3.4.39 | |
| TT40 | Dipvergence | A type of optical misalignment in which optical field vectors projected into the y-z plane have an intersection in either the positive or negative z regions. | A1 | 3.4.40 | |
| TT41 | Binocular overlap | The ratio of the intersection to the union of two monocular areal fields of view for a binocular system. | 3.4.41 | ||
| TT42 | Interpuplillar distance (IPD) | The linear distance between the geometric centers of the exit pupils in the same plane of two monoculars of a binocular system. | 3.4.42 | ||
| TT43 | Narrow IPD setting | For an adjustable IPD system, the minimum settable IPD or the required minimum IPD if the settable IPD can achieve a smaller separation than the minimum separation required distributed equally between the two monoculars if independently adjustable. | 3.4.43 | ||
| TT44 | Wide IPD setting | For an adjustable IPD system, the maximum settable IPD or the required maximum if the settable IPD can achieve a wider separation than the maximum separation required distributed equally between the two monoculars if independently adjustable. | 3.4.44 | ||
| TT45 | Nominal IPD Setting | For an adjustable IPD system, the average of the wide and narrow IPD settings distributed equally between the two monoculars if independently adjustable. | 3.4.45 | ||
| TT46 | Nit (nt) | SI unit of luminance equivalent to 1 candela/m2 . Also approximated in non-SI units as 0.291864 foot-Lamberts (fL) | 3.4.46 |
A)Safety&Comfort
| A) Safety and Comfort | ||||||||||
| ID | Requirement Title | Description | Threshold | Conditions/Assumptions | Internal Ref | External Ref | Verification | Perf spec | ||
| A1 | System mass | The NVD-N system total mass | ≤904 gms | batteries included, filters, sacrificial windows, mount included. Excluded items include eye cups and retention lanyard. | 3.5.1.2 | |||||
| A2 | Z axis Center of gravity | The NVD-N system Z axis center of gravity measured from the NVD-N coordinate system origin IAW defined coordinate system in Figure A1 | ≤+50 mm, ≥-100mm | Binocular deployed configuration, mount included, batteries included, filters, sacrificial windows, objective lenses set to infinity focus, eyepieces set to 0 D. Eye cups and lanyard excluded. | Figure A1 | 3.5.1.3 | ||||
| A3 | Y axis Center of gravity | The NVD-N system Y axis center of gravity measured from the NVD-N coordinate system origin IAW defined coordinate system in Figure A1 | ≤+30mm,≥-10 mm | Binocular deployed configuration, mount included, batteries included, filters, sacrificial windows, objective lenses set to infinity focus, eyepieces set to 0 D. Eye cups and lanyard excluded. | Figure A1 | 3.5.1.4 | ||||
| A4 | X axis Center of gravity | The NVD-N system X axis center of gravity measured from the NVD-N coordinate system origin IAW defined coordinate system in Figure A1 | ≤+20mm,≥-20 mm | Binocular deployed configuration, mount included, batteries included, filters, sacrificial windows, objective lenses set to infinity focus, eyepieces set to 0 D. Eye cups and lanyard excluded. | Figure A1 | 3.5.1.5 | ||||
| A5 | Yaw moment of inertia | The NVD-N system yaw moment of inertia | ≤6.82 gm mm2 | w.r.t. system vertical axis of rotation passing through system center of gravity parallel to the NVD-N coordinate system y axis (Figure A1 NVD-N Reference Coordinate System) | Figure A1 | 3.5.1.6 | ||||
| A6 | Pitch moment of inertia | The NVD-N system pitch moment of inertia | ≤4.71 gm mm2 | w.r.t. system horizontal axis of rotation passing through system center of gravity parallel to the NVD-N coordinate system x axis | Figure A1 | 3.5.1.7 | ||||
| A7 | Roll moment of inertia | The NVD-N system roll moment of inertia | ≤4.99 gm mm2 | w.r.t. system longitudnal axis of rotation passing through system center of gravity parallel to the NVD-N coordinate system z axis | Figure A1 | 3.5.1.8 | ||||
| A8 | Monocular Eye Relief | Each of the NVD-N monocular channels shall provide eye relief with unvignetted FOV per E1 | ≥24.5 mm | w.r.t NVD-N eyepiece vertex of lens element closest to operator's eye. | 3.5.1.9 | |||||
| A9 | Binocular Horizontal Optical Misalignment | The horizontal optical misalignment between the left and right monocular channels shall be | ≤0.5 degrees divergent and ≤1.0 convergent | viewing a paraxial field point, objective set to infinity, eyepieces set to 0 D measured at wide, nominal and narrow IPD settings. | 3.5.1.12 | |||||
| A10 | Not Used | 3.5.1.13 | ||||||||
| A11 | Binocular Vertical Optical Misalignment | The vertical optical misalignment between the left and right monocular channels shall be | ≤0.5 degrees dipverent | viewing a paraxial field point, objective set to infinity, eyepieces set to 0 D measured at wide, nominal and narrow IPD settings. | 3.5.1.14 | |||||
| A12 | Monocular diopter adjustment range | The NVD-N shall have for each monocular a diopter adjustment range of | ≥-2D, ≤+1D | D5, D6, D7, G2, G4 | 3.5.1.19 | |||||
| A13 | Interpupillary distance accommodation range | The NVD-N binocular system shall have an adjustable interpupillary distance between monocular exit pupil centers over a range of | ≤55 mm to ≥70 mm | at an eye relief of 24.5 mm with no vignetting of the full field of view using centered sample apertures no larger than 5 mm diameter. Adjustment of the interpupillary distance shall be possible while maintaining the plane containing both monocular optical axes parallel to the x-z plane. | D8, D9, G5, G6 | 3.5.1.20 | ||||
| A14 | Deployed vertical displacement adjustment minimum range | The NVD-N binocular system shall provide vertical displacement adjustment minimum range | +/-8 mm | binocular deployed, w.r.t nominal eye level position (Figure A2), tilt adjustment set to nominal, fore/aft adjustment set to nominal | D10, D11, G7 | 3.5.1.21 | ||||
| A15 | Deployed fore/aft displacement adjustment minimum range | The NVD-N binocular system shall provide fore/aft displacement adjustment minimum range of | +/-14 mm | binocular deployed, w.r.t nominal eye level position (Figure A2), tilt adjustment set to nominal, vertical adjustment set to nominal | D12, D13, G8 | 3.5.1.22 | ||||
| A16 | Deployed tilt angle adjustment range | The NVD-N binocular system shall provide tilt angle adjustment total range of | ≥-5 degrees to ≤+5 degrees | binocular deployed, w.r.t nominal eye level position (Figure A2), fore/aft adjustment set to nominal, vertical adjustment set to nominal | D14, D15, G9 | 3.5.1.23 | ||||
| A17 | System Helmet attach/detach | The NVD-N system shall provide for a means to attach the NVD-N to the helmet for use and to detach from the helmet when not in use. | TRUE | D16, D17, G13, G14, G15 | 3.5.4.1 | |||||
| A18 | System Monocular Stow/Deploy | (Objective) The NVD-N system shall provide a means for the user to stow and deploy either the left or right monocular out of and into the forward field of regard of the user per A19 (3.5.1.24) while still permitting the other channel to remain deployed. | TRUE | A19, D18, G16 | 3.5.4.4 | |||||
| A19 | Monocular stow forward field residual obscuration | The residual monocular obscuration of the user's static total monocular forward field of regard for the eye pertaining to the stowed monocular with the NVD-N in monocular stow shall be | ≤20% | Deployed monocular and helmet obscurations are included in the total monocular static forward field of regard. | A18, D18, G16 | 3.5.1.24 | ||||
| A20 | System Binocular Stow/Deploy | The NVD-N system shall provide a means for the user to stow and deploy both monocular channels of the system simultaneously out of and into the forward field of regard of the user per A21 (3.5.1.25) while the system is still attached to the helmet while retaining vertical displacement adjustment D10 (3.5.4.8), fore/aft adjustment D12 (3.5.4.10), and tilt angle adjustment D14 (3.5.4.12), and the IPD setting D8 (3.5.4.14), when moving the system from deployed to stow and back to deployed position. | TRUE | A21, D19, F6, G17 | 3.5.4.6 | |||||
| A21 | Binocular stow forward field residual obscuration | The residual binoclar obscuration of the user's static total bonocular forward field of regard for both eyes with the NVD-N in binocular stow shall be | ≤15% | Helmet obscurations are included in the total binocular static forward field of regard. | A20, D19, F6, G17 | 3.5.1.25 | ||||
| A22 | Left/Right channel Brightness gain uniformity | The NVD-N brightness gain variance between the left and right monocular channels shall be less than | 40% | w.r.t. the mean, light source at 3 light levels 3.4e-5, 3.4e-4, 3.4e-3 nt 2856K CT | E6, E7 | 3.5.1.11 | ||||
| A23 | Storage configuration volume | The detached NVD-N shall have a storage configuration occupying a rectangular volume less than | 1900 cm3(T), | |||||||
| 1250 cm3(O) | batteries included, filters, sacrificial windows, eye cups included, objective lenses set to close focus, eyepieces set to -2 D | D23, D24, G18, G32 | 3.5.1.1 | |||||||
| A24 | G-shock system emergency breakaway | The NVD-N shall provide for system emergency breakaway under short duration g-shock | TRUE | A25, A28, A29, A30 | 3.5.1.28 | |||||
| A25 | G-shock system emergency breakaway excess force | The NVD-N system shall break away under impulse shock with a force of | 11 to 13 g | Force applied as torque about the system x axis as shown in Figure A1 while in deployed state. Impulse duration ≤100 ms. Force applied at the systemZ axis center of gravity as determined per requirement A2. | A24, A28, A29, A30 | 3.5.1.29 | ||||
| A26 | Prolonged excessive force system emergency breakaway | The NVD-N shall provide for system emergency breakaway under prolonged excessive applied force | TRUE | A27, A28, A29, A31 | 3.5.1.31 | |||||
| A27 | Prolonged excessive force emergency breakaway excess force | The NVD-N system shall break away under a prolonged excessive force of | 110 +/- 20 N | Force applied as torque about the system x axis as shown in Figure A1 while in deployed state. Impulse duration >100 ms. Force applied at the systemZ axis center of gravity as determined per requirement A2. | A26, A28, A29, A31 | 3.5.1.32 | ||||
| A28 | Emergency breakaway residual retained head supported mass | The residual head supported mass of the NVD-N system after the system emergency breakaway occurs shall be | ≤100 gm | A24, A25, A29, A30 | 3.5.1.34 | |||||
| A29 | Emergency Breakaway residual retained forward projection | The residual forward projection of the NVD-N system after emergency breakaway occurs perpendicular from the mounting face of the shroud mount bracke shall be | ≤25 mm | A24, A25, A28, A30 | 3.5.1.35 | |||||
| A30 | G-shock system emergency breakaway release time | The NVD-N shall break away from the helmet under the loading defined in A23 in | ≤1 sec | A24, A25, A28, A29 | 3.5.1.30 | |||||
| A31 | Prolonged Excessive Force System Emergnecy Breakaway Release Time | The NVD-N shall break away from the helmet under the loading defined in A25 in | ≤3 sec | A26, A27, A28, A29 | 3.5.1.33 | |||||
| A32 | Monocular decentered pupil | Each monocular of the NVD-N shall be usable with a decentered pupil up to a radial distance from the optical axis of | ≥5 mm | Sample pupil size not less than 4 mm and not more than 5mm, radial distance along a perpendicular to the optical axis, decentered pupil located at maximum eye relief of 24.5 mm. | E17, E18, E19 | 3.5.1.10 | ||||
| A33 | Binocular stow vertical protrusion | The vertical protrustion in full binocular stow configuration shall be less than TBD measured from the highest point of the stowed system to the center point of the male mount of the shroud interface per Figure A3. | 3.5.1.26 | |||||||
| A34 | Binocular stow forward protrusion | The forward protrustion in full binocular stow configuration shall be less than TBD measured from the furthest point forward of the stowed system to the center point of the male mount of the shroud interface per Figure A3. | 3.5.1.27 | |||||||
| A35 | Monocular Image Roll Error | Each monocular of the NVD-N shall have -roll error | ≤1.0 ° | average slope of the ocular space optical horizon over a span of at least twice the angular subtense of the minimum peripheral field using a centered sample aperture and not less than 4mm nor more than 5mm diameter and no more than 24.5 mm eye relief | 3.5.1.17 | This one captures the I2 tube spec parameter of "image Inversion" 3.3.3.3.3 | ||||
| A36 | Binocular Roll Mismatch | The binocular roll mismatch of the left and right monocular channels of NVD-N system shall meet | A9 for meridian points, | |||||||
| A11 for horizon points | for field points at the minimum and maximum mid-peripheral field angles on the optical horizon | |||||||||
| -for field points at the minimum and maximum mid-peripheral angles on the optical meridian | 3.5.1.18 | Not captured in any binocular spec that I know of but should be. | ||||||||
| A37 | Binocular Magnification Mismatch | The binocular magnification/distortion mismatch between the left and right monoculars for horizon and meridian field points shall meet | A9 for horizon points, | |||||||
| A11 for meridian points | for field points at the minimum and maximum mid-peripheral field angles on the optical horizon | |||||||||
| -for field points at the minimum and maximum mid-peripheral angles on the optical meridian | 3.5.1.15 | |||||||||
| A38 | Binocular Field of View Overlap | The binocular overlap of the left and right monocular areal fields of view shall be | ≥85% | at the narrow, nominal and wide interpupillary distance settings with the monocular objectives set for infinity focus and eyepieces set for 0 diopters | 3.5.1.16 |
B)Interoperability
| B) Interoperability | ||||||||
| ID | Requirement Title | Description | Threshold | Conditions/Assumptions | Internal Ref | External Ref | Verification | |
| B1 | Helmet Compatibility | The NVD-N shall be compatible with the following helmet systems | IHPS, ACH, ECH | all helmet-mounted configurations including binocular deployed, binocular stowed, monocular deployed, and monocular stowed and provide full range of position adjustability in the deployed configurations for IPD, vertical, fore/aft, and tilt adjustments per (A13)3.5.1.20, (A14)3.5.1.21, (A15) 3.5.1.22, and (A16) 3.5.1.23. | 3.5.2.1 | |||
| B2 | Protective Mask Compatibility | The NVD-N shall be compatible with the following protective masks | M50/M51 | in all helmet-mounted configurations including binocular deployed, binocular stowed, monocular deployed, and monocular stowed with reduced adjustment range permitted in fore/aft and tilt and performance reduction permitted i.a.w (Table B3) Table 1. | Table B3 | 3.5.2.2 | ||
| B3 | Helmet Mount Compatibility | The NVD-N shall be compatible with the following helmet interfaces | Drawing A3256368 | all helmet-mounted configurations including binocular deployed, binocular stowed, monocular deployed, and monocular stowed and provide full range of position adjustability in the deployed configurations for IPD, vertical, fore/aft, and tilt adjustments per (A13)3.5.1.20, (A14)3.5.1.21, (A15) 3.5.1.22, and (A16) 3.5.1.23. | DWG A3256368 | 3.5.2.3 | ||
| B4 | Laser Filter Compatibility | The NVD-N shall be compatible with the standard Laser Interference Filter | Drawing 5009738 | C8 | DWG 5009738, | 3.5.2.4 | ||
| B5 | Eyepiece sacrificial window | The NVD-N shall be compatible with standard eyepiece shield | Drawing A3256353 | C7 | DWG A325653 | 3.5.2.5 | ||
| B6 | Objective lens sacrificial window | The NVD-N shall be compatible with standard objective lens sacrificial window | Drawing A3144264 | DWG A3144264 | 3.5.2.6 | |||
| B7 | Eye protection compatibility | The NVD-N shall be compatible with at least one each of the "Spectacles" group and at least one of the "Goggles" group based on | Table of authorized eye wear (Table B1) | in all helmet-mounted configurations including binocular deployed, binocular stowed, monocular deployed, and monocular stowed with reduced adjustment range permitted in fore/aft and tilt and performance reduction permitted i.a.w (Table B3) Table 1. | Table B1, Table B3 | 3.5.2.7 | ||
| B8 | Glove compatibility | The NVD-N controls and functions shall be compatible with the following gloves | Table of authorized gloves and mittens (Table B2) | Table B2 | 3.5.2.8 | |||
| B9 | Aiming laser compatibility | Then NVD-N shall be compatible with the following aiming lasers | AN/PEQ-15, PEQ-2A, PSQ-23 | 3.5.2.9 | ||||
| B10 | Test set compatibility | The NVD-N shall be optically and mechanically compatible with | TS-3895 | adaptive hardware permitted | 3.5.2.10 | |||
| B11 | Eye cup compatibility | The NVD-N monocular eyepieces shall be compatible with and capable of receiving and retaining external eye cups. | TRUE | 3.5.2.11 | ||||
| B12 | Mission-Oriented Protective Posture, Level IV Compatibility | The NVD-N shall be compatible for normal user operation, user maintenance and unit level maintenance for users donning the personal protective gear | MOPP IV | in all helmet-mounted configurations including binocular deployed, binocular stowed, monocular deployed, and monocular stowed with reduced adjustment range permitted in fore/aft and tilt and performance reduction permitted i.a.w (Table B3) Table 1. | 3.5.2.12 |
C)Servicability
| C) Serviceability | |||||||||
| ID | Requirement Title | Description | Threshold | Conditions/Assumptions | Internal Ref | External Ref | Verification | ||
| C1 | Battery number | The NVD-N shall operate on no more than two (2) commercially available batteries | 3.5.3.1 | ||||||
| C2 | Battery type | The NVD-N shall operate with any of the following commercially available battery types | AA L91 Lithium, AA Alkaline | 3.5.3.2 | |||||
| C3 | Battery life, cold temperature | The NVD-N shall operate continuously on a single set of batteries for no less than | 6 hours | L91 Lithium, binocular max gain, -40 C | 3.5.3.4 | ||||
| C4 | Battery life, room temperature | The NVD-N shall operate continuously on a single set of batteries for no less than | 8 hours | L91 Lithium, binocular max gain, -20 C | 3.5.3.3 | ||||
| C5 | Battery life, hot temperature | The NVD-N shall operate continuously on a single set of batteries for no less than | 8 hours | L91 Lithium, binocular max gain, 49 C | 3.5.3.5 | ||||
| C6 | Battery Reverse Polarity Protection | The NVD-N shall have battery polarity reversal damage protection such that the system shall not be damaged by incorrect insertion of the battery(ies). | TRUE | 3.5.3.6 | |||||
| C7 | Sacrificial window replacement | Sacrificial windows for both the monocular objective lens defined in B6 and the eyepiece lens defined in B5 shall be replaceable at | User level | without gloves, without special tools | B5 | 3.5.3.7 | |||
| C8 | Laser interference filter replacement | The laser interference filter for the monocular objective lens defined in B4 shall be replaceable at | user level | without special tools beyond the light interference filter container/wrench provided with the system . Gloved hand replacement is not required. | B4 | 3.5.3.8 | |||
| C9 | Eye Cup Replacement. | Eye cups for both the monocular eyepieces defined in 3.5.2.11 and the eyepiece lens defined in 3.5.2.5 shall be replaceable at | user level | without gloves, without special tools | 3.5.3.9 | ||||
| C10 | Interchangeable Components | The NVD-N shall utilize the following interchangeable system components | Table C1 | 3.5.3.10 | |||||
| C11 | Objective Lens Assembly Replacement | The NVD-N objective lens assembly shall be capable of fault diagnosis and replacement at | Unit Level | Standard unit service tool kit. Trained maintenance technician | 3.5.3.11 | ||||
| C12 | Eye Piece Lens Assembly Replacement | The NVD-N eye piece lens assembly shall be capable of fault diagnosis and replacement at | Unit Level | Standard unit service tool kit. Trained maintenance technician | 3.5.3.12 | ||||
| C13 | Imaging Sensor Assembly Replacement | The NVD-N imaging sensor assembly shall be capable of fault diagnosis and replacement at | Unit Level | Standard unit service tool kit. Trained maintenance technician | 3.5.3.13 | ||||
| C14 | Binocular Bridge Assembly Replacement | The NVD-N binocular bridge assembly shall be capable of fault diagnosis and replacement at | Unit Level | Standard unit service tool kit. Trained maintenance technician | 3.5.3.14 | ||||
| C15 | Helmet NVG Shroud Mount Assembly Replacement | The NVD-N helmet NVG shroud mount assembly shall be capable of fault diagnosis and replacement at | Architecture B: Unit Level | ||||||
| Architecture A: User Level | Archirtecture B: Standard unit service tool kit. Trained maintenance technician | ||||||||
| Architecture A: without gloves, without special tools | 3.5.3.15 |
C10 TBD All of the marking requirements moved to section 3.4.4 of the draft spec.
D)User Interface
| D) User Interface | ||||||||
| ID | Requirement Title | Description | Threshold | Conditions/Assumptions | Internal Ref | External Ref | Verification | |
| D1 | Objective lens focus adjustment | The NVD-N shall have user adjustable focus of the objective lens of each monocular independently | TRUE | single handed, with or without gloves | D2, D3, D4, E4, G1, G3 | D | 3.5.4.17 | |
| D2 | Objective Lens Focus adjustment torque | The objective lens focus adjustment torque shall be | ≥.07,≤.57 N-m | single handed, with or without gloves | D1, D3, D4, E4, G1, G3 | 3.5.4.18 | ||
| D3 | Objective lens near focus stop | The objective lens focus adjustment shall provide a positive stop position while adjusting to near focus | ≥0.1 turn, ≤1 turn beyond the required minimum near point of focus | D1, D2, D4, E4, G1, G3 | M | 3.5.4.19 | ||
| D4 | Objective lens far focus stop | The objective lens focus adjustment shall provide a positive stop position while adjusting to infinity | ≥0.001 turn, ≤1 turn beyond the infinity focus setting | D1, D2, D3, E4, G1, G3 | M | 3.5.4.20 | ||
| D5 | Monocular eyepiece diopter adjustment | The NVD-N shall have user adjustable diopter setting of the eyepiece of each monocular independently | TRUE | without gloves | A12, D6, D7, G2, G4 | D | 3.5.4.21 | |
| D6 | Monocular eyepiece diopter adjustment torque | The eyepiece diopter adjustment torque shall be | ≥0.07,≤0.57 N-m | without gloves | A12, D5, D7, G2, G4 | M | 3.5.4.22 | |
| D7 | Eyepiece diopter adjustment stops | Diopter adjustment stops shall be provided to indicate the maximum adjustment has been reached | TRUE | A12, D5, D6, G2, G4 | D | 3.5.4.23 | ||
| D8 | Interpupillary distance adjustment | The NVD-N shall have user adjustable interpupillary distance if required to meet A13 (3.5.1.20) | TRUE | without gloves | A13, D9, G5, G6 | D | 3.5.4.14 | |
| D9 | Interpupillary distance adjustment torque | The interpupillary distance adjustment torque shall be | ≥.07,≤.57 N-m | without gloves | A13, D8, G5, G6 | M | 3.5.4.15 | |
| D10 | Deployed Vertical Displacement Adjustment | The NVD-N shall have user adjustable vertical displacement of the binocular w.r.t. the user's eye level as per A14 (3.5.1.21). | TRUE | deployed, without gloves | A14, D11, G7 | D | 3.5.4.8 | |
| D11 | Deployed vertical adjustment force | The force required to perform vertical adjustment or to release vertical adjustment lock shall be | ≥36, ≤80 N | deployed, without gloves | A14, D10, G7 | M | 3.5.4.9 | |
| D12 | Deployed Fore/aft displacement adjustment | The NVD-N shall have user adjustable fore/aft displacement of the binocular w.r.t. the user's eye pupil location as per A15 ( 3.5.1.22). | TRUE | A15, D13, G8 | 3.5.4.10 | |||
| D13 | Deployed fore/aft adjustment force | The force required to perform fore/aft adjustment or to release the fore/aft adjustment lock shall be | ≥36, ≤80 N | deployed, without gloves | A15, D12, G8 | 3.5.4.11 | ||
| D14 | Deployed tilt angle adjustment | The NVD-N shall have user adjustable tilt angle of the binocular w.r.t. the nominal tilt angle as per A16 (3.5.1.23) | TRUE | A16, D15, G9 | 3.5.4.12 | |||
| D15 | Deployed tilt adjustment force | The force required to perform tilt angle adjustment or to release the tilt angle adjustment lock shall be | ≥36, ≤80 N | deployed, without gloves | A16, D14, G9 | 3.5.4.13 | ||
| D16 | System helmet attachment force | The NVD system shall attach to the helmet mount interface with an attachment force of | ≥36, ≤80 N | single handed, with or without gloves | A17, D17, G13, G14, G15 | 3.5.4.2 | ||
| D17 | System helmet detachment force | The NVD-N system shall detach from the helmet mount interface with a detachment force of | ≥36, ≤80 N | single handed, with or without gloves | A17, D16, G13, G14, G15 | 3.5.4.3 | ||
| D18 | System monocular stow/deploy force | The force required to perform monocular stow/deploy shall be | ≥20, ≤30 N | single handed, with or without gloves | A18, A19, G16 | 3.5.4.5 | ||
| D19 | System binocular stow/deploy force | The force required to perform binocular stow/deploy shall be | ≥36, ≤80 N | single handed, with or without gloves | A20, A21, F6, G17 | 3.5.4.7 | ||
| D20 | Monocular deploy auto-on | No Requirement. Place holder only. | ||||||
| D21 | Binocular deploy auto-on | The NVD-N system shall automatically power on both monoculars within 1.5 sec of the system being moved from the stow to deploy configuration. | TRUE | 3.5.4.25 | ||||
| D22 | Battery Life Indicator Time Remaining | The NVD-N system shall have a battery life indicator to notify the user of a low battery conditionwhich shall activate when the system battery life drops below | 40 min ± 20 min | when using Li batteries at an ambient temperature between 0°C and 40°C. | 3.5.4.26 | |||
| D23 | Detached system storage configuration | The NVD-N system shall provide the user capability to render the system into a storage configuration IAW with A23 (3.5.1.1) | TRUE | A23, D24, G18, G32 | 3.5.4.28 | |||
| D24 | Storage/Operation reconfigure time | The NVD-N shall be reconfigured between storage and operational configurations by the user in less than | 1 minute | with gloves as in Table B2 (Table 3) total darkness | A23, D23, G18, G32 | 3.5.4.29 | ||
| D25 | High ambient auto shut down indicator | The NVD-N shall provide a warning indicator if the high ambient protection mode is a full system auto shut down per E13 (3.5.7.14), E14 (3.5.7.15),E15 (3.5.7.13), G11 | TRUE | E13, E14, E15, G11 | 3.5.4.27 | |||
| D26 | Monocular Eyepiece Diopter Adjustment Position Indicator | Each monocular eyepiece shall have rotation position indicators that enable the the eyepiece setting to be moved from a set position and restored to the previously set position | <0.1 turn error | 3.5.4.24 | ||||
| D27 | Interpupillary distance adjujstment stop | Each monocular shall have a positive stop for the user adjusted IPD setting when deploying either monocular from the monocular stow position as described in A18 (3.5.4.4.) | TRUE | 3.5.4.16 |
E)Performance
| E) Performance | ||||||||
| ID | Requirement Title | Description | Threshold | Conditions/Assumptions | Internal Ref | External Ref | Verification | |
| E1 | Monocular field of view | The objective space horizontal field of view for each monocular channel of the NVD-N shall be | ≥38 degrees | for the objective lens set to infinity, eyepiece set to 0D, at an eye relief of no less than 24.5 mm at narrow, nominal, and wide IPD settings. | 3.5.5.3 | |||
| E2 | Monocular optical magnification | The NVD-N for each monocular shall have paraxial magnification of | ≥.97,≤1.03 | Objective lens set to infinity, eyepiece set to 0 diopters | 3.5.5.5 | |||
| E3 | Monocular optical distortion | The NVD-N for each monocular shall have total optical distortion of | ≤3.0% | At any point in the field of view | 3.5.5.6 | |||
| E4 | Monocular Objective Lens Focus range | The NVD-N for each monocular shall provide an objective focus range of | ≤45cm to infinity | distance with respect to the user's pupil | D1, D2, D3, D4, G1, G3 | 3.5.5.7 | ||
| E5 | Off-axis veiling glare | The NVD-N for each monocular shall not exceed the maximum veiling glare image brightness per | Table E1 | in the brightest area of the visible field of view while illuminated with a point source no larger than 1.0 mr and luminance no less than 850 ± 150 nt when placed at the out-of-field angles along the optical horizon as specified in Table 8and maximum display background brightness less than 5e-3 nt without off-axis illumination. | Table E1 | 3.5.7.1 | ||
| E6 | Monocular Centered Pupil On-Axis Brightness Gain | The NVD-N for each binocular shall have a gain | ≥5500 | when viewing spot no larger than the paraxial field centered on the optical axis of a uniformly illuminated target filling the full areal field of view at or below 3.43 e-4 nt with a sampling aperture diameter of no less than 4mm and no more than 5mm centered on the optical axis at an eye relief of no less than 24.5 mm. | A22, E7 | 3.5..5.15 | ||
| E7 | Monocular Saturation Level Maximum Output Brightness | Each monocular channel for the NVD-N shall provide a saturation level maximum output brightness | ≥8.5, ≤14.5nt | with a sampling aperture diameter of no less than 4mm and no more than 5mm centered on the optical axis at an eye relief of no more than 24.5 mm | A22, E6 | 3.5.5.17 | ||
| E8 | Man target detection range | The NVD-N shall provide 70% probability of human detection to | ≥200 m | Clear starlight, NVIPM model parameters table E3 | Table E3 | 3.5.5.1 | ||
| E9 | Near focus visual acuity on axis | Each monocular channel for the NVD-N shall provide near focus on-axis centered pupil visual acuity better than | 20/60 | ) for a real or virtual target at optical distance ≤45cm from the eye vertex using a sampling aperture diameter not less than 4mm nor greater than 5 mm at an eye relief no greater than 24.5 mm with a 100% contrast resolution test pattern centered in field of view within 1 degree and background brightness at or below 3.4 e-4 nt, and objective focus setting optimized. | 3.5.5.13 | |||
| E10 | Monocular Centered Pupil Infinity Focus On-Axis Visual Acuity | The NVD-N shall provide far focus visual acuity in each monocular equivalent to or better than | 20/25 or equivalent | for a real or virtual target at optical distance ≥10m using a sampling aperture diameter not less than 4mm nor greater than 5 mm at an eye relief no greater than 24.5 mm with a 100% contrast resolution test pattern centered in field of view within 1 degree, target luminance at or below 3.4e-4 nt and objective and ocular focus settings optimized. | 3.5.5.8 | |||
| E11 | Infinity focus visual acuity off axis | Each monocular channel for the NVD-N shall provide infinity focus off-axis centered pupil visual acuity better than | 20/40 or equivalent | for a real or virtual target at optical distance ≥10m using a sampling aperture diameter not less than 4mm nor greater than 5 mm at an eye relief no greater than 24.5 mm with a 100% contrast resolution test pattern offset in the field of view to 14 degree +/- 1 degree and background brightness at or below 3.4 e-4 nt, and objective focus setting optimized. | 3.5.5.10 | |||
| E12 | Infinity focus stop visual acuity | Each monocular channel for the NVD-N shall provide infinity focus on-axis centered pupil visual acuity better than | 20/70 or equivalent | for a real or virtual target at optical distance ≥10m using a sampling aperture diameter not less than 4mm nor greater than 5 mm at an eye relief no greater than 24.5 mm with a 100% contrast resolution test pattern centered in field of view within 1 degree and background brightness at or below 3.4 e-4 nt, and objective focus setting set to the infinity focus stop. | 3.5.5.12 | |||
| E13 | Monocular High Light Protection Ambient Light Level | The NVD-N system shall not be permanently damaged when the system is exposed to ambient scene light levels of | ≤40 lx*(4/π)*(f/#)² [nt] | After exposure to high ambient scene for greater than time limit of E14, system shall continue to meet E8, E10 and E11 or be capable of restoration to meet E8, E10 and E11 without component replacement. | D25, E14, E15, G11 | 3.5.7.14 | ||
| E14 | High light protection activation time | The NVD-N system shall not be permanently damaged when exposed to high ambient light level per E13, for time duration of | ≤100 sec | After exposure to high ambient scene at minimum light level of E13, system shall continue to meet E8, E10 and E11 or be capable of restoration to meet E8, E10 and E11 without component replacement. | D25, E13, E15, G11 | 3.5.7.15 | ||
| E15 | Monocular High Light Protection Mode Visual Acuity | The NVD-N system, if continuing to operate while high lilght protection is activated, shall operate with visual acuity performance IAW | Table E2 | when the target background luminance is between ≥2.4 nt, ≤13.7 nt. | Table E2, D25, E13, E14, G11 | 3.5.5.14 | ||
| E16 | Aiming laser spot detection range | The NVD-N shall have an aiming laser spot minimum range of detection with 70% probability of | ≥350 m | Aiming laser used is the PEQ-15. NVIPM model base parameters in Table E4. | 3.5.5.2 | |||
| E17 | Monocular Decentered Pupil Off-Axis Brightness Gain. | ) Each monocular channel for the NVD-N shall provide a luminance gain of | ≥2475 | when viewing no more than a 2 degree diameter spot at the minimum peripheral field angle on the optical horizon and optical meridian for uniformly illuminated target filling the full areal field of view at or below 3.4 e-4 nt with a sampling aperture diameter of no less than 4mm and no more than 5mm radially decentered 5mm from the optical axis in the same radial direction as the off-axis field being sampled at an eye relief of no less than 24.5 mm. | A32, E18, E19 | 3.5.5.16 | ||
| E18 | Monocular Decentered Pupil Infinity Focus On-Axis Visual Acuity | Each monocular channel for the NVD-N shall provide infinity focus on-axis decentered pupil visual acuity | ≤20/50 or equivalent | for a real or virtual target at optical distance ≥10m using a sampling aperture diameter not less than 4 mm nor greater than 5 mm decentered 5mm in any radial direction perpendicular to the optical axis at an eye relief of no more than 12 mm with a 100% contrast test pattern centered in field of view within 1 degree, and background brightness at or below 3.4 e-4 nt, and objective focus setting optimized. | A32, E17, E19 | 3.5.5.9 | ||
| E19 | Monocular decentered pupil off axis visual acuity degredation | Each monocular channel for the NVD-N shall provide infinity focus off-axis decentered pupil visual acuity better than | ≤20/80 or equivalent | Actual or virtual target at optical distance ≥10m , test pattern offset in field to 14 degrees +/- 1 degree, 100% contrast test pattern background brightness at or below 1e-4 fL, objective focus setting optimized for centered target, at 5 mm decentration in any radial direction perpendicular to the optical axis at the maximum eye relief of 12 mm. Pupil decentration radial direction is the same as the off-axis field point radial direction. Equivalent threshold resolution for non-Snellen target acuities per table E5 of Hoffman test set equivalencies. | A32, E17, E18 | 3.5.5.11 | ||
| E20 | Flash Pulse Latency | Each monocular channel of the NVD-N shall exhibit peak to peak light pulse latency between an input light pulse in the object space and the corresponding ouput light pulse in virtual space of | ≤8 ms | for a <2° angular extent, 1e-2 nt peak luminance, 100 ms FWHM wide light pulse stimulus within the paraxial field with a sampling aperture diameter of no less than 4mm and no more than 5mm centered on the optical axis at an eye relief of no more than 24.5 mm. | 3.5.5.22 | |||
| E21 | Moving Image Limiting Resolution | |||||||
| E22 | Detectable Pulsing Source Frequency | Each monocular channel of the NVD-N shall for a pulsing light source shall provide a detectable pulse frequency of | ≥30 Hz | pulsing source <2° angular extent, 3.4 w-4 nt peak luminance constant frequency sinusoidal luminance pulsing source within the paraxial field with a sampling aperture diameter of no less than 4mm and no more than 5mm centered on the optical axis at an eye relief of no more than 24.5 mm. | 3.5.5.23 | |||
| E23 | Minimum Detectable Flash Duration | |||||||
| E24 | Low Range Monocular Discernable Gray Shades | The NVD-N shall provide low range minimum number of discernable gray shades of | ≥16 | For Object space target white level luminance of 1 e-5 nt,viewing the virtual space image of a test target with neutral gray reflectance tiles with minimum reflectance of less than or equal to 0.5% and maximum reflectance greater than or equal to 95.0% and maximum log scale separation between adjacent gray levels of reflectance values of 1.42 with a sampling aperture diameter of no less than 4mm and no more than 5mm centered on the optical axis at an eye relief of no more than 24.5 mm | 3.5.5.19 | |||
| E25 | Luminance Gain Linearity | |||||||
| E26 | Monocular optical aspect | Each monocular channel shall have a monocular optical aspect | ≥0.7, ≤1.05 | for the objective lens set to infinity, eyepiece set to 0D, at an eye relief of no less than 24.5 mm. | 3.5.5.4 | |||
| E27 | Monocular Black Level Output Brightness | Each monocular channel for the NVD-N shall provide a black level | ≤2.5 e-3 nt | average luminance in a sample field of at least 2° viewing the virtual space image of a fully obscured input with a sampling aperture diameter of no less than 4mm and no more than 5mm centered on the optical axis at an eye relief of no more than 24.5 mm. | 3.5.5.18 | |||
| E28 | Mid Range Monocular Discernable Gray Shades | The NVD-N shall provide mid range minimum number of discernable gray shades of | ≥16 | For Object space target white level luminance of 2.3 e-3 nt,viewing the virtual space image of a test target with neutral gray reflectance tiles with minimum reflectance of less than or equal to 0.5% and maximum reflectance greater than or equal to 95.0% and maximum log scale separation between adjacent gray levels of reflectance values of 1.42 with a sampling aperture diameter of no less than 4mm and no more than 5mm centered on the optical axis at an eye relief of no more than 24.5 mm | 3.5.5.20 | |||
| E29 | High Range Monocular Discernable Gray Shades | The NVD-N shall provide mid range minimum number of discernable gray shades of | ≥16 | For Object space target white level luminance of 4.0 e-1 nt,viewing the virtual space image of a test target with neutral gray reflectance tiles with minimum reflectance of less than or equal to 0.5% and maximum reflectance greater than or equal to 95.0% and maximum log scale separation between adjacent gray levels of reflectance values of 1.42 with a sampling aperture diameter of no less than 4mm and no more than 5mm centered on the optical axis at an eye relief of no more than 24.5 mm | 3.5.5.21 |
F)Security
| F) Security | ||||||||
| ID | Requirement Title | Description | Threshold | Conditions/Assumptions | Internal Ref | External Ref | Verification | |
| F1 | Audibility | The NVD-N shall not emit audible sound detectable beyond | ≥10 m | while only in the deployed steady state operation, while only in the deployed steady state operation while viewing an ambient scene with average luminance ≥3.4 e-2 nt i.a.w requirement 2 of MIL STD 1474 Level II Aural Nondetectablity. | 3.5.6.1 | |||
| F2 | Light Emission | The NVD-N shall not emit visible light detectable beyond | ≥10 m | worn with eye cups installed and seated against the face by observers with unaided vision in an ambient light level of 3.4 e-4 nt viewing from the +z, +y, +x, -x directions as defined in Figure A1 (Figure 3) | 3.5.6.2 | |||
| F3 | Radiated emissions | The NVD-N shall not emit electromagnetic radiation per | RE102 | MIL STD 461E | 3.5.6.3 | |||
| F4 | System detach auto off | NO REQUIREMENT. PLACE HOLDER ONLY | 3.5.6.4 | |||||
| F5 | Monocular stow auto-off | NO REQUIREMENT. PLACE HOLDER ONLY | 3.5.6.5 | |||||
| F6 | Binocular stow auto-off | The NVD-N shall automatically power off both monocular channels within 500 ms of the system being placed into the stow configuration. | TRUE | A20, A21, D19, G17 | 3.5.6.6 | |||
| F7 | System surface specular reflectivity | NO REQUIREMENT. PLACE HOLDER ONLY | 3.5.6.7 | |||||
| F8 | System surface finish | The NVD-N system surfaces for exposed, contiguous, non-optical materials shall be | flat, dull | per AMS-STD-595A. The following are excluded: optics, buttons, screws, mount assemblies, finger pads, small area items less than 10% of exposed surface area relative to the whole exposed surface area. | FED-STD-595C | 3.5.6.8 | ||
| F9 | System surface color | The NVD-N exposed surface color for all contiguous materials shall be earth tone | Brown 20150 OR Brown 20180 | per AMS-STD-595A. The following are excluded: Optics, Optical housings, buttons, screws, mount assemblies, finger pads, small area items less than 10% of exposed surface area relative to the whole exposed surface area. | FED-STD-595C | 3.5.6.9 |
G)Durability&Workmanship
| G) Durability & Workmanship | ||||||||
| ID | Requirement Title | Description | Threshold | Conditions/Assumptions | Internal Ref | External Ref | Verification |
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