Speckle reduction for display system with electromechanical grating
First Claim
Patent Images
1. A display system with reduced speckle, comprising:
- a) a light source providing an illumination beam;
b) a linear light modulator comprising at least one linear array of light modulating devices for forming a modulated beam, the modulated beam comprising a plurality of orders of diffracted light from the illumination beam;
c) an obstructing element for blocking a zeroeth order reflected light from the modulated beam;
d) an angle-transforming optical assembly for anamorphically conditioning the modulated beam;
e) a scanning element for scanning the modulated beam toward a display surface for forming a two-dimensional image thereon.
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Abstract
A display system (10) with reduced speckle has a light source (70) providing an illumination beam and a linear light modulator (85) having at least one linear array of light modulating devices for forming a modulated beam. The modulated beam has a plurality of orders of diffracted light. An obstructing element (82r,82g,82b) blocks a zeroeth order reflected light from the modulated beam. An angle-transforming optical assembly (30) anamorphically conditions the modulated beam. A scanning element (77) scans the modulated beam toward a display surface (90) for forming a two-dimensional image thereon.
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Citations
50 Claims
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1. A display system with reduced speckle, comprising:
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a) a light source providing an illumination beam; b) a linear light modulator comprising at least one linear array of light modulating devices for forming a modulated beam, the modulated beam comprising a plurality of orders of diffracted light from the illumination beam; c) an obstructing element for blocking a zeroeth order reflected light from the modulated beam; d) an angle-transforming optical assembly for anamorphically conditioning the modulated beam; e) a scanning element for scanning the modulated beam toward a display surface for forming a two-dimensional image thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A display system, comprising:
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a) at least one modulation assembly, each modulation assembly comprising; i) a light source providing a plurality of illumination beams; ii) a linear light modulator comprising at least one linear array of light modulating devices simultaneously receiving the plurality of illumination beams and forming a modulated beam by diffraction of each illumination beam, wherein the modulated beam corresponds to a line of image pixels; iii) an obstructing element for blocking, from each modulated beam for each image pixel, a zeroeth order reflected light, thereby transmitting the modulated beam as a plurality of orders of diffracted light for each image pixel in the image line; b) a lens for directing at least a portion of the plurality of orders of diffracted light in the modulated beams toward a scanning element for scanning each successive line of image pixels to a display surface, forming a two-dimensional image thereon. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A display system with reduced speckle, comprising:
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a) a light source providing an illumination beam; b) a linear light modulator comprising at least one linear array of light modulating devices for forming a modulated beam, the modulated beam comprising a plurality of separate light beams; c) an obstructing element for blocking a portion of light from the modulated beam; d) an angle-transforming optical assembly for anamorphically conditioning the modulated beam; e) a scanning element for scanning the modulated beam toward a display surface for forming a two-dimensional image thereon. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A display system with reduced speckle, comprising:
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a) a light source providing an illumination beam; b) a linear light modulator comprising at least one linear array of light modulating devices for forming a modulated beam, the modulated beam comprising a plurality of orders of diffracted light from the illumination beam; c) an obstructing element for blocking a zeroeth order reflected light from the modulated beam; d) an angle-transforming optical assembly for anamorphically conditioning the modulated beam to form a conditioned modulated beam; e) a scanning element for scanning the conditioned modulated beam toward a display surface for forming a two-dimensional image thereon. - View Dependent Claims (44, 45)
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46. A method for displaying an image, comprising:
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a) providing an illumination beam; b) forming a line of image pixels by diffraction of the illumination beam at a linear light modulator, thereby forming a modulated beam comprising a plurality of orders of light for each image pixel; c) blocking, for each image pixel, a zeroeth order reflected light from the modulated beam and transmitting multiple orders of diffracted light for each image pixel as a modulated beam; d) anamorphically conditioning the modulated beam to expand the angle of diffracted orders; and e) directing the conditioned modulated beam toward a display surface. - View Dependent Claims (47, 48)
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49. A method for displaying an image, comprising:
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a) directing a plurality of illumination beams toward a linear light modulator; b) forming a line of image pixels by diffraction of each illumination beam at the linear light modulator, thereby forming a plurality of modulated beams comprising a plurality of orders of light for each image pixel; c) blocking, for each image pixel, a zeroeth order reflected light from each said modulated beam and transmitting multiple orders of diffracted light for each image pixel as said modulated beam; and
,d) directing each said modulated beam toward a display surface. - View Dependent Claims (50)
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Specification