Fine-optically polishing for double-sides ensures accurate /4 wavefront and <30 seconds parallelism over the both surfaces
Ultrasonic wave cleaning substrate with purified water removes impurities and dust effectively
IRO source assisted coating for durability and resistance to scratching, as well as stability on CWL (central wavelength). No deviation from temperature change.
Constant stringent quality testing processes - Each filter is tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure each filter is a high-quality product