Brief Description of Micro-projector Filter

In conventional projectors, it is necessary to separate and combine the light source, change the optical path, optical filter, and use the dichroic mirror. The light source can be separated into RGB three primary colors, processed separately, and then combined and transmitted. When changing the optical path, high-performance reflection is also necessary. These are collectively referred to as micro-projector filters.

The general filters of the micro-projector include: anti-blue through red-green, anti-red through blue-green, anti-red and anti-green through blue, and reflector.

Anti-blue transparent red-green filter:

S1: incidence angle 45 degrees

420~ 470nm@T <1% 471~ 480nm@T <10%

495~504nm@>94% 505~ 565nm@T >97%

605~ 680nm@T >97% 505~ 680nmTave@T >97%


S2: 45 ° incidence angle


Anti-red blue-green filter:

S1: incidence angle 45 degrees

605~ 680nm@T <1%

500~ 585nm@T >97%

430~ 480nm@T >97%

S2: 45 ° incidence angle


Anti-red anti-green blue filter:

S1: incidence angle 45 degrees

420~ 480nm@T >97%

500~ 680nm@T <1%

S2: 45 ° incidence angle



420~ 680nm@R >98%

1 1


Hanzhong Brisun Optics Co., Ltd. Is the high precision optical element manufacturer provides customized production of Various optical lenses, including spherical lens, cylindrical lens, optical window, mirror, prism, filter, metal base mirror and other high-precision optical elements. The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.

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