Projector with enhanced security camcorder defeat
First Claim
1. A projector with enhanced security camcorder defeat including 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;
(e) an interference modulation element located at a plane in an optical path located between said polychromatic light source and said spatial light modulator; and
(f) a detection means for determining the absence of said interference modulation element.
9 Assignments
0 Petitions
Accused Products
Abstract
A projector (10) with enhanced security camcorder defeat including a copy protection illumination system (1) for illuminating a spatial light modulator (30) comprises: a polychromatic light source (20); uniformizing optics (22) for homogenizing light from the polychromatic light source to provide a uniform illumination field; relay optics; dichroic optics; an interference modulation element (5) located at a plane in an optical path located between the polychromatic light source and the spatial light modulator; and a detection means for determining the absence of the interference modulation element.
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Citations
23 Claims
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1. A projector with enhanced security camcorder defeat 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;
(e) an interference modulation element located at a plane in an optical path located between said polychromatic light source and said spatial light modulator; and
(f) a detection means for determining the absence of said interference modulation element. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A projector with enhanced security cancorder 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;
(e) an interference modulation element located at a plane in an optical path located between said spatial light modulator and said projection lens, or at a plane in the optical path within said projection lens; and
(f) a detector for determining an absence of said interference modulation element. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A projector with enhanced security 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;
(g) an interference modulation element located at a plane in an optical path located between said polychromatic light source and said projection lens, or at a plane in the optical path within said projection lens; and
(h) a detector for determining the absence of said interference modulation element. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method of increasing security of a camcorder defeat enabled projector comprising the step of:
adding a detector for determining the presence of camcorder defeat hardware to an existing safety interlock system of a lamphouse.
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23. A motion picture projector, improvements therein comprising:
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a camcorder defeat mechanism; and
a detector for determining presence of said camcorder defeat mechanism.
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Specification