UNSPSC 31241815: Interference filter

A filter that filters the wave of specific wavelength by using the interference phenomenon that arises on thin film.

UNSPSC 31241815 Interference filter is a Commodity code covering optical filtering and lens components used in microscopy and laboratory instrumentation. State and local governments procure interference filters and related optical accessories as part of broader microscope and laboratory equipment acquisitions supporting educational institutions, diagnostic facilities, and research operations. The work is typically bundled with microscope systems, supplementary optical components, and ancillary laboratory equipment rather than sourced as a standalone line item. Issuing bodies include state education agencies, university systems, public health departments, and school districts; the Texas Comptroller of Public Accounts and the State of Michigan have posted relevant opportunities in recent months.

Recent activity centers on Texas and Michigan. The Texas Comptroller of Public Accounts solicited microscopes and accessories through the Texas Cooperative Purchasing Network (TCPN) on August 5, 2026, with proposals due September 1, 2026 — an indefinite-quantity, requirements-type cooperative vehicle enabling multiple state agencies and local entities to access firm fixed-price unit costs for microscope equipment and related optical components including interference filters. The State of Michigan issued a Notice of Intent for RFP 250000002612 regarding optical lenses and frames posted July 27, 2026, though the underlying RFP scope, contract value, and procurement timeline are not disclosed in the summary materials; prospective vendors must access the complete RFP directly from Michigan's procurement system to assess eligibility and scope.