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:
May. 13, 2003
Filed:
Jul. 07, 2000
Applicant:
Inventor:
Herschel Clement Burstyn, Princeton, NJ (US);
Assignee:
Sarnoff Corporation, Princeton, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 2/100 ; G03B 2/114 ; G03B 2/128 ; G03B 2/160 ; G03B 2/608 ;
U.S. Cl.
CPC ...
G03B 2/100 ; G03B 2/114 ; G03B 2/128 ; G03B 2/160 ; G03B 2/608 ;
Abstract
A rear projection system provides for reduced cabinet depth by folding the optical path with polarization sensitive mirrors. In one aspect, the projector outputs linearly polarized light to a quarter-wave polarizing sheet, which circularly polarizes the projector output. A mirror directs the projected light back through the quarter-wave material to a polarization-dependent reflector. The light has a reflective polarization state. The polarization-dependent reflector reflects the light back to the quarter-wave material and mirror. Upon traversing the path a second time, the light is in a transmissive polarization state.