Projector with camcorder defeat
First Claim
Patent Images
1. A copy protection illumination system for illuminating a spatial light modulator comprising:
- (a) a polychromatic light source;
(b) uniformizing optics for homogenizing light from said polychromatic light source to provide a uniform illumination field;
(c) relay optics;
(d) dichroic optics; and
(e) an interference modulation element located at a plane in an optical path located between said polychromatic light source and said spatial light modulator.
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Accused Products
Abstract
A copy protection illumination system (1) comprises a polychromatic light source (20); uniformizing optics (22) for homogenizing light from the polychromatic light source to provide a uniform illumination field; condenser relay optics; dichroic optics; illumination relay optics (82); a spatial light modulator (30); and a modulation element located at a plane in an optical path located between the polychromatic light source and the spatial light modulator.
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Citations
83 Claims
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1. A copy protection illumination system for illuminating a spatial light modulator comprising:
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(a) a polychromatic light source;
(b) uniformizing optics for homogenizing light from said polychromatic light source to provide a uniform illumination field;
(c) relay optics;
(d) dichroic optics; and
(e) an interference modulation element located at a plane in an optical path located between said polychromatic light source and said spatial light modulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A projector with camcorder defeat capability including a copy protection illumination system for illuminating a spatial light modulator comprising:
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(a) a polychromatic light source;
(b) uniformizing optics for homogenizing light from said polychromatic light source to provide a uniform illumination field;
(c) relay optics;
(d) dichroic optics; and
(e) an interference modulation element located at a plane in an optical path located between said polychromatic light source and said spatial light modulator.
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20. A copy protection imaging system comprising:
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(a) a spatial light modulator;
(b) image relay optics;
(c) a dichroic combiner;
(d) a projection lens; and
(e) an interference modulation element located at a plane in an optical path located between said spatial light modulator and said projection lens. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A projector with camcorder defeat including a copy protection imaging system comprising:
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(a) a spatial light modulator;
(b) image relay optics;
(c) a dichroic combiner;
(d) a projection lens; and
(e) an interference modulation element located at a plane in an optical path located between said spatial light modulator and said projection lens.
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37. A projector with camcorder defeat for projecting a multicolor image onto a display surface comprising:
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(a) a polychromatic light source;
(b) uniformizing means for homogenizing light from said polychromatic light source to provide a uniform illumination field;
(c) condenser relay optics for directing said uniform illumination field toward a dichroic separator, said dichroic separator providing colored light for a first, second, and third colored channel;
(d) wherein each colored channel is similarly constructed and comprises;
(i) an illumination relay lens for imaging and directing said colored light in said colored channel towards;
(ii) a spatial light modulator for forming a first image thereon; and
(iii) an image relay lens for focusing and relaying a real image of said first image towards a dichroic combiner;
(e) said dichroic combiner forming a multicolor image by combining said real image from said first colored channel, said real image from said second colored channel, and said real image from said third colored channel;
,(f) a projection lens for projecting said multicolor image toward said display surface; and
(g) an interference modulation element located at a plane in an optical path located between said polychromatic light source and said projection lens. - View Dependent Claims (38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61)
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42. A projector as in 41 wherein said interference modulation element is modulated in such a way that the interference modulation element, when averaged over time, modulates the light equally over the field.
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51. A projector as in claim to 50 wherein said single color channel is a channel which has excess light for a desired white light color temperature when displayed.
- 62. A method of creating temporal and spatial interference using an interference modulation element at a plane conjugate to a spatial light modulator in a digital projection system.
- 70. A method of creating temporal interference using an interference modulation element at an aperture stop plane or a plane conjugate to an aperture stop plane in a digital projection system.
- 76. A method of creating temporal and spatial interference using an interference modulation element at a plane in convergent or divergent space outside the depth of focus of the image plane or conjugate image plane in a digital projection system.
Specification