By coating infrared absorption ink on the optical substrate and multi layer design of optical film, the light incident at different angles would have a small deviation angle, so the detection range is more accurate, the imaged graphics are not distorted, and the image quality is greatly improved. It is used in smart cars and other camera modules.

The optical glass substrate is precision coated and patterned with semiconductor processes such as photoresist coating, photolithography, development, and etching for micron-level high-precision pattern processing, which is mainly used in smart car projection modules.