The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2006
Filed:
Jun. 11, 2002
Applicants:
Richard T. Ingwall, Newton, MA (US);
David A. Waldman, Concord, MA (US);
Inventors:
Richard T. Ingwall, Newton, MA (US);
David A. Waldman, Concord, MA (US);
Assignee:
Aprilis, Inc., Maynard, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A holographic optical filter that includes an optical recording medium for storing several multiplexed reflection holograms that are formed by successive interference between two or more collimated object beams with a common collimated reference beam. The object beams are incident to the recording material at a series of angles chosen to provide reflection efficiency over the desired filed of view at the specified wavelength.