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:
Feb. 13, 1996
Filed:
Jun. 17, 1994
Applicant:
Inventors:
Juanita R Riccobono, Nashua, NH (US);
Jacques E Ludman, Hollis, NH (US);
Assignee:
Northeast Photosciences, Hollis, NH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G03H / ; G03H / ;
U.S. Cl.
CPC ...
359-3 ; 359 22 ; 359 25 ; 430-1 ; 430-2 ;
Abstract
A high efficiency, broad bandwidth, volume holographic element for diffraction windows. This holographic element is fabricated so that it can passively track and diffract solar radiation throughout the course of a day. Such a hologram can effectively illuminate the interior of a building or room with sunlight. This invention can reduce both lighting costs and the cooling costs associated with generating artificial light.