UNSPSC 31241809: Lyot filter

A type of optical filter named for its inventor Bernard Lyot, that uses birefringence to produce a narrow passband of transmitted wavelengths.

UNSPSC 31241809 Lyot filter is a Commodity code that does not reflect the scope of work actually being solicited by state and local governments under the opportunities tagged with this code. Recent postings under the code name microscopes, microscope accessories, and optical lenses and frames — products unrelated to Lyot filters (specialized optical interference filters used in narrowband spectroscopy and solar observation). The Texas Comptroller of Public Accounts posted a cooperative purchasing solicitation on August 5, 2026, for microscopes and accessories through the Texas Cooperative Purchasing Network (TCPN), with a response deadline of September 1, 2026; this RFQ establishes an indefinite-quantity, requirements-type agreement with firm fixed-price unit costs enabling multiple Texas state and local agencies to purchase specified microscope equipment and related accessories to support educational and laboratory functions. The State of Michigan posted a notice of intent on July 27, 2026, related to optical lenses and frames, though the underlying RFP scope, contract value, and evaluation criteria are not fully documented in the posted materials.

The code shows minimal recent activity aligned with its nominal scope, with the available opportunities concentrated in Texas and Michigan. The Texas cooperative purchasing vehicle represents the more substantive opportunity, drawing participation from multiple state and local agencies within the TCPN structure. Respondents to the Texas solicitation must complete mandatory certifications, provide firm fixed-price unit costs via attachment F, specify warranty terms covering defects and repairs, and comply with Texas vendor preferences (Texas-based vendor, service-disabled veteran, or environmentally sensitive product designations) alongside federal regulatory provisions. The 120-day response period following the September 1, 2026 deadline extends the engagement window for cooperative agreement holders. Prospective vendors should verify whether this code accurately represents their target opportunity scope or whether microscope and optical-lens procurement falls under a more appropriate UNSPSC classification for their business development strategy.