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.