Optical coating is a crucial step in the production of optical components, and its technological level directly affects product performance. Nanjing Epax Optics Co., Ltd. is equipped with advanced coating equipment and supporting systems in the industry, combined with standardized production management, to build a stable and efficient coating production system and ensure product quality.

There are 5 coating workshops in the company, with a film thickness control accuracy of ± 0.1nm and a large-area coating uniformity error of less than 1%; In terms of supporting systems, three ultrasonic cleaning machines adopt the "multi frequency alternating cleaning" process, which is detected by laser interferometers to ensure component cleanliness and control the occurrence rate of coating pinhole problems below 0.1%. The company customizes over 200 sets of tooling fixtures, suitable for various components. The rotating fixtures are designed for large-sized non spherical reflectors, controlling the coating uniformity error within 1.5%.

The company has established a "process parameter database+intelligent monitoring system" to store more than 500 sets of parameters, shorten the process development cycle, equip various equipment in the quality inspection process, and improve the production capacity of large-sized and high damage threshold products.