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Contact SupplierThis filter is designed to be used with Sciencetech's Highly Collimated Flash systems. It offers Spectral Matching in a range far greater than required by any international standards association (ASTM, IEC, or JIS). The main area of improvement is the region from 1,100nm to 1,700nm (the Near IR), and allows better confidence in spectral matching for systems that have considerable IR response (unlike Silicon, which most standards were designed for, and has no response past 1,100nm). Please note that since the region past 1,100nm is not covered by any standards, it can't technically be declared to be "Class A" (since classifications mean adherence to standards). However, we can extrapolate the standards into this region. Correspondingly, we can also do better than Class A for this region (or any other spectral region of interest) as a custom project. Please speak with your authorized Sciencetech technical sales staff member to discuss if you require better than Class A spectral matching.