Speckle reduction for display system with electromechanical grating
AssigneeEastman Kodak Company
InventorsMarek W. Kowarz, Farouk H. Bonilla, Brian E. Kruschwitz, James G. Phalen
Life of this patent
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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.
Claims50
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.
A display system, comprising:
- 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.
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 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.
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 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.
A method for displaying an image, comprising:
- 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.
A method for displaying an image, comprising:
- 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.
Dependencies are inferred from the claim text.