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Optical filter is divided into reflective coating and the absorption of blue glass filter

by:HENGXIANG     2020-11-19
Optical filter can be generalized into reflective coating and the absorption of blue glass filter two kinds, the former can reflect the infrared back and restore object imaging the real color, but in certain circumstances, such as incident Angle is large, light is reflected light will multiple reflection and refraction in the lens group, form a flare or ghost; The latter can be absorbed more than 700 nm infrared, but at the same time allowing visible light by between 390 ~ 700 nm, so can avoid the reflection method caused by improper reflection, refraction problems. Blue glass filter: colored glass filter is a kind of using scattered light absorption material in the glass material control incident wavelength optical parts. This kind of filter to absorb part of the visible light ( Long wavelength side) To allow from ultraviolet to infrared light of the rest of the wide band pass. From ultraviolet to infrared, only part of the visible light absorption ( Long wavelength side) , other wavelengths can be fixed by. Filter is blue. Blue glass filter is applied to a digital camera, digital camera, CCTV, security monitoring camera, cell phone camera, video phone, electronic toys, etc. Infrared belong to not visible, will not have any influence to human vision, but for camera or cell phone camera is not so. Adopted by the camera CCD or CMOS sensor sensitivity is quite high, will capture the invisible light of infrared ray, make after lens imaging picture with the colour of the human eye actually see the difference. To avoid these deviations, camera makers must add filter in front of the sensor. Color filter for more color filter structure, the article of the LCD with the color filter structure containing glass substrate, black matrix, color layer, the protective film and ITO conductive film, the photoelectric component is produced in transparent glass substrate antireflection shading layer - Black matrix ( Black matrix) Again, in order to make a transparent red, green, and blue light color filter layer, and then on the filter layer coating a layer of smooth layer ( 在外套) And finally sputtering ITO transparent conductive film. Relevant tags: optical filter
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