Patents by Inventor Robert Lawrence Sinclair

Robert Lawrence Sinclair has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Catadioptric zoom lens assemblies
    Patent number: 5940222
    Abstract: A catadioptric zoom lens assembly has a catoptric objective lens group with a forwardly facing primary mirror and a rearwardly facing first surface reflecting secondary mirror located forwardly of the primary mirror to create an intermediate image forwardly of the primary mirror. A zoom relay lens group is located optically rearwardly of the intermediate image and has a stationary field lens subgroup, a first movable lens subgroup and a second movable lens subgroup.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: August 17, 1999
    Assignee: Wescam Inc.
    Inventors: Robert Lawrence Sinclair, Russell M. Hudyma