HIGH EFFICIENCY DIGITAL CINEMA PROJECTION SYSTEM WITH INCREASED ETENDUE
First Claim
1. A digital cinema projection apparatus comprising:
- a) an illumination source having a first etendue value for providing polarized polychromatic light;
b) a first lens element in the path of the polarized polychromatic light for forming a substantially telecentric polarized polychromatic light beam;
c) a color separator for separating the telecentric polarized polychromatic light beam into at least two telecentric color light beams;
d) at least two transmissive spatial light modulators that modulate the two telecentric color light beams and form at least two modulated color beams,wherein there is an etendue value associated with each spatial light modulator, and wherein the etendue value is within 15% or greater than the first etendue value corresponding to the illumination source;
e) a color combiner for combining the modulated color beams along a common optical axis, forming a multicolor modulated beam thereby; and
f) a projection lens for directing the multicolor modulated beam toward a display surface.
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Accused Products
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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Citations
58 Claims
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1. A digital cinema projection apparatus comprising:
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a) an illumination source having a first etendue value for providing polarized polychromatic light; b) a first lens element in the path of the polarized polychromatic light for forming a substantially telecentric polarized polychromatic light beam; c) a color separator for separating the telecentric polarized polychromatic light beam into at least two telecentric color light beams; d) at least two transmissive spatial light modulators that modulate the two telecentric color light beams and form at least two modulated color beams, wherein there is an etendue value associated with each spatial light modulator, and wherein the etendue value is within 15% or greater than the first etendue value corresponding to the illumination source; e) a color combiner for combining the modulated color beams along a common optical axis, forming a multicolor modulated beam thereby; and f) a projection lens for directing the multicolor modulated beam toward a display surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A digital cinema projection apparatus comprising:
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a) an illumination source comprising a lens element for providing polarized telecentric polychromatic light at a first etendue value; b) a spectral separator for separating the polarized telecentric polychromatic light beam into at least a first telecentric color light beam and a second telecentric color light beam; c) a color modulation section comprising at least; i) a first transmissive spatial light modulator in the path of the first telecentric color light beam and modulating the first telecentric color beam to form a first modulated color beam; ii) a second transmissive spatial light modulator in the path of the second telecentric color light beam and modulating the second telecentric color beam to form a second modulated color beam, wherein there is a second etendue value at the first spatial light modulator and wherein the second etendue value is within 15% of the first etendue value; d) a color combiner for combining at least the first and second modulated color beams along a common optical axis, forming a multicolor modulated beam thereby; and e) a projection lens coaxial to the common optical axis for directing the multicolor modulated beam toward a display surface. - View Dependent Claims (52)
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53. A digital cinema projection apparatus comprising:
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a) an illumination source comprising a lens element for providing polarized telecentric polychromatic light; b) a spectral separator for separating the polarized telecentric polychromatic light beam into at least a first telecentric color light beam and a second telecentric color light beam; c) a color modulation section comprising at least; i) a first spatial light modulator in the path of the first telecentric color light beam and modulating the first telecentric color beam to form a first modulated color beam; ii) a second spatial light modulator in the path of the second telecentric color light beam and modulating the second telecentric color beam to form a second modulated color beam, d) a color combiner for combining at least the first and second modulated color beams along a common optical axis, forming a multicolor modulated beam thereby; e) a concave curved reflective surface for redirecting the multicolor modulated beam toward a convex curved reflective surface ; and f) a projection lens coaxial to the common optical axis for directing the multicolor modulator beam toward a display surface. - View Dependent Claims (54, 55, 56, 57, 58)
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Specification