Archived posting to the Leica Users Group, 2015/04/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Or it was Katharine Burr Blodgett in 1935 working for GE http://en.wikipedia.org/wiki/Katharine_Burr_Blodgett " Using this technique, Blodgett developed practical uses for Langmuir?s gossamer films. Blodgett used a barium stearate film to cover glass with 44 monomolecular layers, making the glass more than 99% transmissive and creating "invisible" glass. The visible light reflected by the layers of film canceled the reflections created by the glass.[5] This type of nonreflective coating is now called Langmuir-Blodgett film and is widely used.[11] The first major cinematic production to use Blodgett's invisible glass was the popular film Gone with the Wind (1939), noted for its crystal-clear cinematography. Once introduced, nonreflective lenses were used for projectors and cameras by the post-war movie industry. Blodgett's glass was also used for submarine periscopes and airplane spy cameras during World War II.[5]" On 4/24/15 10:39 PM, "Doug Herr" <wildlightphoto at earthlink.net> wrote: > Mark Rabiner wrote: > >> The Pentax Super-Multi-Coated Takumar 50/1.4 was the first lens anybody >> could get their hands on which had this advanced coating which everyone >> was >> very hyped on and was developed by Pentax in conjunction with Zeiss > > IIRC the coating process was developed by Optical Coating Laboratories > Inc, of > Santa Rosa California. Pentax bought the patents from OCLI. > > > Doug Herr > Birdman of Sacramento > http://www.wildlightphoto.com > http://doug-herr.fineartamerica.com > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information -- Mark William Rabiner Photographer http://gallery.leica-users.org/v/lugalrabs/