Due to the presence of 808nm laser temperature drift and the angle of incidence of light causes photoelectric Geng Xu for customers design and custom 812nm narrowband filter, suitable for precision optical instruments, as was OD4, half bandwidth (FWHM60% half-bandwidth: 15nm center wavelength: 812 ± 0.5nm appearance requirements: 80/50 400nm-780nm Tave60% 840nm ~ 1100nm T <0.01% Dimensions: Ф40 * 4.0mm Applications: Security 808 infrared camera, 808 optical instruments, laser night vision, laser measurement instrument