Manufacturing Technique

• Fine-optically polishing for double-sides—— Ensure accurate λ/4 wavefront /*C*and*C*/ <30 seconds parallalism over the both surfaces
• Ultrasonic wave cleaning substrate with purified water—— Cleanup by 13 purified water tank to remove inpurities /*C*and*C*/ dust effectively
• Iro source assisted coating—— For durability /*C*and*C*/ resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.
• Constantly stringent quality testing processes—— Each filter was tested by spectrophotometer /*C*and*C*/ laser interferometer testing spectrum /*C*and*C*/ wavefront to ensure market filter is qualified product