Narrowband Filter

A narrowband filter is a filter with a relatively narrow bandwidth, named after BP, and the wavelength position with a relatively large transmission value is used as their serial number. Half of the larger transmittance of the narrowband filter corresponds to the half width, the short-wave cut-off wavelength is on the short-wave side of the peak, and the transmittance is equal to zero, and the long-wave cut-off wavelength is on the long-wave side of the peak, and the transmission is equal to zero wavelengths. The narrow-band optical filter produced by Anshan Jiet Optoelectronics has high transmittance, low optical signal attenuation rate, effectively improving working distance and light intensity; high cut-off depth, effectively avoiding stray light interference; high wavelength accuracy; advanced coating machine production, IAD Ion-assisted coating technology ensures low temperature drift and stronger film firmness.
The function of the narrow-band filter is only to allow light in a certain wavelength range to pass, while the light of other wavelengths cannot pass. Various digital and electronic product windows, solar cells, IC packaging, etc. can be used to reduce the influence of variegated light or light pollution, measure the surface temperature of stars, separate color exposure to eliminate the influence of chromatic aberration, and reduce the impact of the sun, moon, Mars, etc. Brightness gets clearer details, can prevent infrared, ultraviolet exposure to CCD or damage to the eyes and so on.
At the same time, narrow-band filters are also widely used in photographic creation, printing plate making, color photography and magnification, and various technical photography. Especially in black and white photography, it can have three functions of passing, limiting and blocking all kinds of color light. If it is blocked, the color tone is all black, so in black and white photography, the narrow-band filter actually plays the role of correcting the color contrast of the object, so that the color of various objects becomes the contrast and the ideal tone.