TRD_Redacted.pdf

Technical Requirements Document

Wire Grid Polarizer/Beam Combiner

07 April 2023 iii

Abbreviations, Acronyms, and Symbols

Ravg Average Reflection g Force per unit mass due to gravity at the Earth's surface GWEF Guided Weapon Evaluation Facility mm Millimeters um Micrometers nm Nanometers RMS Root Mean Square S-Polarized Light that has an electric field polarized perpendicular to the plane of incidence P-Polarized Light that has an electric field polarized parallel to the plane of incidence AR Anti-Reflective iv

Table of Contents

Abbreviations, Acronyms, and Symbols ........................................................................................ iii Table of Contents ........................................................................................................................... iv

1. Introduction

2. Physical Requirements

3. Performance Requirements

4. Schedule

3. Performance Requirements

a. Wire grid polarizer optical requirements are given in Table 1 below.

Table 1. Wire Gird Polarizer Optical Requirements

Wire Grid Polarizer Optical Requirements Threshold Objective

Size 86mm x 86mm ±0.2mm 86mm x 86mm ±0.1mm

Thickness 0.675mm ±0.1mm 0.675mm ±0.03mm Low Frequency Form Error (RMS reflected wave front error at 633 nm for spatial scale lengths over a 25 mm aperture, measured in 5 locations)

2.5 Waves

1 Wave

Low Frequency Form Error (RMS transmitted wave front error at 1550 nm for spatial scale lengths over a 25 mm aperture, measured in 5 locations)

1/2 Waves

1/10 Waves

Scratch-Dig (RMS for spatial scale lengths of 2.5 – 80 microns (ISO 10110 default bandwidth)

60-20

10-5

Edge Finish Chamfered and Finished Parallelism (as measured over a 25mm diameter clear aperture, measured in 5 locations)

< 30 arcseconds < < 1 arcminute

S-Reflection (measured at 2 um – 5 um @ AOI 45 Degree ±12 Degree)

>85% >90%

P-Transmission (measured at 2 um – 5 um @ AOI 45 Degree ±12 Degree)

>85% >90%

AR Coating Custom Coating 2‐5um AR Coating Reflectivity, 2 um – 5 um (45 Degree

AOI)

<2% <1%

AR Coating Reflectivity, 2 um – 5 um (60 Degree

AOI)

<6% <3%

AR Coating Reflectivity, 2 um – 5 um (30 Degree

AOI)

<2% <1%

4. Schedule

a. Delivery after receipt of order shall be no greater than 18 weeks.