Patent Number: 6,310,733

Title: Optical elements and methods for their manufacture

Abstract: Improved optical elements having rises and faces, which may have annular or linear grooves, such as Fresnel spherical or cylindrical lenses, and methods of making them, are disclosed wherein an opaque coating is imparted to the rises by methods including positioning pre-printed opaque elements on a substrate such that when the optical element is pressed, stamped, embossed or molded from the substrate, rises of the completed element comprise said pre-printed opaque elements. A reflective element is made by imparting a reflective coating onto a substrate and then a non-reflective coating to the rises, e.g. by applying non-reflective material to the element and selectively cleaning it to leave a coat of non-reflective material adhering to the rises but not the faces. Photoresist, photographic emulsion, or ink may be used as the coating. Unwanted light may also be minimized by using circularly polarized light.

Inventors: Dolgoff; Eugene (Westbury, NY)

Assignee:

International Classification: G09G 3/00 (20060101); H04N 13/00 (20060101); G02B 003/08 ()

Expiration Date: 10/30/2018