Home : : Corporate Information : : Application : : Product Lineup : : OCJ Core Technology : : Quality Control & Production Process Corporate Information : : Company profile : : History : : Chairman's message : : Main customers : : Contact Application : : Filter for CD & DVD pick-up : : Filter for optical communication : : Filter & mirror for LCD projectors : : Filter for the fluorescence / Raman analysis Product Lineup : : Interference filter : : Infrared filter : : Laser mirror : : Beam splitter : : High performance cold mirroron deep dish : : Cold mirror / filter : : Dichroic mirror / filter : : Antireflection : : Neutral density filter : : Metal coating : : DLC coating OCJ Core Technology : : Coating process : : Optics thin-film design : : Control technology Quality Control & Production Process : : Quality Control : : Production control : : Production process Features DLC is produced by OCJ’s unique plasma CVD method. DLC has two good points, which are high transmittance over the IR region and high durability. It is suitable for IR windows for vision sensors, lens coating and for the protection window for CO2 lasers. DLC is transparent in the IR region and since its refractive index is about 2.2, it can be used as an A/R coating over Ge and Si substrates. High hardness and superior abrasion resistance make DLC useful as a protection coating. It passes the Abrasion test: MIL-C-48497A 4.5.5.1 (sand eraser with 1kg pressure). Picture 1. DLC Coating Picture 2. Conventional AR coating Humidity : No change after 600 hours at 85 degrees C/ 85% Rh Adhesiveness : Passed MIL-C-48497A 4.5.3.1 Salt water : Passed at 85 degrees C/ 5wt% / 24hrs Cosmetics : It meets with 80-50 in MIL-O-13830 Max coating size : 400 mm diameter Copyright(C) 2004 Optical Coatings Japan All Rights Reserved. : : info@ocj.co.jp