US 7,857,455 B2
Combining P and S rays for bright stereoscopic projectionGeneral
US 7,857,455 B2
Combining P and S rays for bright stereoscopic projection
Tech Center:
2800 Semiconductors/Memory, Circuits/Measuring and Testing, Optics/Photocopying, Printing/Measuring and Testing
Examiner:
Georgia Y Epps
Art Unit:
2878 Optics
Agent:
Inventors:
Matt Cowan; Lenny Lipton; Jerry Carollo
Assignee:
Priority:
10/18/06
Filed:
10/18/06
Granted:
12/28/10
Expiration:
11/17/28
Abstract
A multiple path stereoscopic projection system is disclosed. The system comprises a polarizing splitting element configured to receive image light energy and split the image light energy received into a primary path and a secondary path, a reflector in the secondary path, and a polarization modulator or polarization modulator arrangement positioned in the primary path and configured to modulate the primary path of light energy. A polarization modulator may be included within the secondary path, a retarder may be used, and optional devices that may be successfully employed in the system include elements to substantially optically superimpose light energy transmission between paths and cleanup polarizers. The projection system can enhance the brightness of stereoscopic images perceived by a viewer. Static polarizer dual projection implementations free of polarization modulators are also provided.
Cooperative Patent Classification (CPC)
G03G03B21/28G03BG02B30/25G02B