![]() Chemical reactions take place in a vacuum and the reaction product is deposited on the lens. Usually the optical coating is done by one of two methods: physical vapour deposition (PVD), in which oxide materials evaporate and are deposited on the lens, and plasma-enhanced chemical vapor deposition (PECVD). After finishing the process the glass lenses are removed from the holder and the holder is cleaned by sand-blasting or other techniques. The fixture, containing a large number of lenses, is placed in the coating machine. The lenses are first cleaned, and then loaded into a fixture. Lens coating: An antireflection coating is applied to the finished lenses.It is necessary to clean the glass preform and the mould before starting the process, but there is no polishing or post-machining required. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |