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Visible Longwave Pass (VIS LWP) Filters transmit wavelengths longer than their specified 50% cut-on wavelength and block shorter wavelengths. Stock filters are optimized for collimated input at normal incidence and ambient temperature (0° AOI, f/inf, 298K). Out-of-band (OOB) transmission levels are <=0.01% average and <=0.1% maximum in the cited blocking range. Custom visible longwave pass filters can be designed, manufactured, and verified to meet almost any spectral and/or system operating requirement.
Reynard Corporation standard parameters apply:
Substrate Material: BK-7
Thickness: 2mm ±0.2mm
Spectral Tolerance: ±2%
Surface Quality: F-F per MIL-F-48616
Parallelism: < 3 Arc Minutes
Cut-on wavelength defined at 50% of maximum transmittance
Transmission Range: Cut-on +4% to 2.6 microns
