Invention Application
- Patent Title: DIGITAL CINEMA PROJECTION SYSTEM WITH INCREASED ETENDUE
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Application No.: PCT/US2007012124Application Date: 2007-05-22
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Publication No.: WO2007139761A3Publication Date: 2008-02-14
- Inventor: SILVERSTEIN BARRY D , KIRCHER JAMES ROBERT , BIETRY JOSEPH RAYMOND
- Applicant: EASTMAN KODAK CO , SILVERSTEIN BARRY D , KIRCHER JAMES ROBERT , BIETRY JOSEPH RAYMOND
- Assignee: EASTMAN KODAK CO,SILVERSTEIN BARRY D,KIRCHER JAMES ROBERT,BIETRY JOSEPH RAYMOND
- Current Assignee: EASTMAN KODAK CO,SILVERSTEIN BARRY D,KIRCHER JAMES ROBERT,BIETRY JOSEPH RAYMOND
- Priority: US80881306 2006-05-26; US73977507 2007-04-25
- Main IPC: H04N5/74
- IPC: H04N5/74 ; H04N9/31
Abstract:
A digital cinema projection apparatus having an illumination source with a first etendue value for providing polarized polychromatic light. A first lens element lies in the path of the polarized polychromatic light for forming a substantially telecentric polarized polychromatic light beam. A color separator separates the telecentric polarized polychromatic light beam into at least two telecentric color light beams. At least two transmissive spatial light modulators modulate the two telecentric color light beams. There is an etendue value associated with each spatial light modulator. The etendue value is within 15% or greater than the first etendue value corresponding to the illumination source. A color combiner combines the modulated color beams along a common optical axis, forming a multicolor modulated beam thereby; and a projection lens directs the multicolor modulated beam toward a display surface.
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