Patents Assigned to Societe d'Applications Generales d'Electricite et Mecanique-Sagem
  • Transflective colour filter, and a method of manufacturing such a filter
    Patent number: 5570240
    Abstract: A transflective optical filter comprises a single transparent or transluscent substrate; a colored slice made up of a plurality of layers, each corresponding to one color out of at least two colors; a light diffusing layer; and an opaque mask on which the marks to be displayed in color are represented by transparent zones, the colored slice and the mask consisting of photographic emulsions. A method for making that filter involves multiple exposures of a same film having a multi-colored "slice" and a monochrome photosensitive layer.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: October 29, 1996
    Assignee: Societe d'Applications Generales d'Electricite et Mecanique-Sagem
    Inventors: Christophe Deffontaines, Ambroise Parker, Daniel Lecat