Does anyone know for sure if zeiss developed their own multicoatings technologies for their T* coatings or is it just smc licensed and renamed?
----------------- J.C.O'Connell [email protected] ----------------- -----Original Message----- From: PDML [mailto:[email protected]] On Behalf Of Dario Bonazza Sent: Friday, December 21, 2012 3:53 PM To: Pentax-Discuss Mail List Subject: Re: didnt pentax invent multicoating in '71? To put it better: Zeiss knew what to do, but had no industrial process for mass-producing multicoated lenses at affordable cost. So Zeiss used their expensive process for small production of multicoated lenses for military and scientific applications only. When Asahi Opt.Co,. became aware of that during the cooperation with Zeiss, they developed the manufacturing technology for mass-producing multicoated lenses at affordable cost, based on patents by OCLI. So Asahi could apply the Zeiss knowledge and Zeiss could use the Asahi industrial process. Most other manufacturers paid royalties to Pentax for some time, except Fujifilm, who developed their own EBC technology for applying multiple thin layers. Dario -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
