Small filter plays a big role

Small filter plays a big role

After a series of fantastic journeys such as cold processing, coating, cutting, inspection and fitting, pieces of blue glass have become filters less than half the size of nails and only 0.21mm thick.


Borisun Optics is a high-tech enterprise specializing in the R&D, production and sales of precision photoelectric film components. Blue glass infrared cut-off filter is the core product of Yizhao Optoelectronics.

“Although each piece of blue glass infrared cut-off filter is only a few millimeters square, each camera cannot lack it. It can effectively filter infrared light, effectively improve glare, ghost, color deviation and other problems in optical imaging. It is an essential component of high-performance cameras, widely used in optical communications, smartphones, computers, aerospace and other fields.” According to the project manager, the company produces hundreds of millions of filters annually, and half of them go abroad.


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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