Bandpass filter is filter transmission surrounded by two blocking area. Just part of light could transmit and blocking the other wavelength. It can be divided into wide bandpass filters and narrow bandpass filters. Wide bandpass filters are usually used for imaging application like fluorescence microscope, machine vision. The narrow bandpass filter like bandwidth <20nm is usually used for applications of lasers and analyzer instrument.
Narrow bandpass filter and wide bandpass filter are usually combined to use. It also can be called interference filters.
Coligh’s capability:
Material: BK7, B270， Borofloat glass, Fused silica, Soda-lim glass, color glass and other glass clients require
Wavelength: 200-1600nm
Typical FWHM: 3+/-0.6nm, 5+/-1nm, 10+/-2nm, 25+/-3nm and 50+/-5nm. You also could choose more
Typical wavelength: 254nm, 340nm, 430nm, 450nm, 532nm, 570nm, 650nm, 808nm, 850nm, 875nm, 940nm, 1064nm
Shape: Round or square
Size: 3-100mm
Size allowance: +/0.1mm, +/-0.05mm
Parallelism and flatness: clients custom
