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US 7,738,151 B2Granted
Holographic projector
AssigneeBoard of Regents, The University of Texas System
InventorsHarold R. Garner, Bala Nagendra Raja Munjuluri, Michael L. Huebschman
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Abstract
A projection device having a coherent light beam-generator that generates a light beam and a beam expander disposed to receive the light beam and to emit an expanded light beam. The projection device also includes a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam with a convergent or focusing lens disposed to receive and modulate the holographic light beam and a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image.
Claims57
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- wherein the expanded light beam is shifted by less than a width of a mirror on the digital micro-mirror device to enhance a resolution of the 3-dimensional holographic image.
4 more elements
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- wherein the holographic transform is resized to a size smaller or larger than the original image and imaged to a surface of the digital micro-mirror device to produce the 3-dimensional holographic image that is larger or smaller than the original image when illuminated with the same wavelength of light of the original image.
4 more elements
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- wherein the holographic transform disposed to the digital micro-mirror device is illuminated with a wavelength of light longer or shorter than a wavelength used to produce the original image in order to produce the 3- dimensional holographic image which is larger or smaller than an original object recorded in the original image.
4 more elements
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- wherein the digital micro-mirror device is illuminated at a widest grating dispersion angle to enable larger viewing because of an increase in distance between multiple diffraction orders as an illumination angle increases.
4 more elements
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- wherein a focal length of the convergent or focusing lens displays only one complex conjugate wave images from a pair of complex conjugate wave images produced by the hologram, selected such that the convergent or focusing lens will focus one image at a desired distance and focus the other image at a relatively infinite distance.
4 more elements
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- wherein an optimal distance of a holographic plane from the digital micro-mirror device, used to record or compute holograms, is determined such that no overlap in multiple scenes can be observed.
4 more elements
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- wherein multiple diffraction order scenes are removed from reconstructed images by manufacturing the digital micro-mirror device with mirrors positioned in irregular patterns, which includes at least one of non-parallel rows, columns or missing mirrors.
4 more elements
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- a hologram recording system coupled to the projection device by land-line or airwaves, wherein the hologram recording system comprises a CCD camera or similar digital recording device to feed the holographic transform via a computer to the digital micro-mirror device, wherein information of three dimensional scenes is disposed to the CCD camera by selectively recording depth information using a reference beam to modulate time-selection at the desired depth of scene during hologram capture.
4 more elements
A projection device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- a liquid crystal plate volumetric image reconstructor that receives the focused holographic light beam and emits a 3-dimensional holographic image of the original image;
- and
- a hologram recording system coupled to the projection device by land-line or airwaves, wherein the hologram recording system comprises a CCD camera or similar digital recording device to feed the holographic transform via a computer to the digital micro-mirror device, wherein different wavelengths of coherent light are used to display the 3-dimensional holographic image than the wavelengths used to record the holographic transform of the original image.
4 more elements
A projection device comprising:
- a coherent light beam-generating device that produces one or more expanded light beams;
- a digital micro-mirror device connected to a processor to display a holographic transform of an original image thereon and disposed to receive and reflect the expanded light beam into a holographic light beam;
- a convergent or focusing lens disposed to receive and modulate the holographic light beam;
- and
- a Rhodopsium or similar type material reconstructor that (a) is imprinted with one or more holograms at a finer resolution by using the digital micro-mirror device and the imprinted holograms are erased by another laser beam, and (b) receives the focused holographic light beam and modulates the holographic light beam to emit a 3-dimensional holographic image of the original image from the imprinted holograms at video rate.
2 more elements
A 3D display device comprising:
- a coherent light beam-generator that generates a light beam;
- a beam expander disposed to receive the light beam and to emit an expanded light beam;
- and
- a digital micro-mirror device disposed to receive a holographic transform of an original image and to display the holographic transform for illumination by the expanded light beam into a holographic light beam onto one or more frosted plates or translucent sheets which may be translated or rotated, wherein the human eye perceives a 3-dimensional holographic image of the original image in the holographic light beam.
1 more element
A method of creating a hologram comprising:
- generating an expanded light beam;
- disposing a pattern derived from an original image or model on a surface of a digital micro-mirror device disposed to receive the expanded light beam;
- generating a modulated light pattern;
- varying an intensity of the modulated light pattern to compensate for a loss of intensity as the modulated light pattern traverses multiple layers in a liquid crystal volumetric plate image reconstructor;
- and
- focusing the modulated light pattern using a convergent or focusing lens onto the liquid crystal volumetric plate image reconstructor to create a 3-dimensional holographic color image of the original image.
3 more elements
Dependencies are inferred from the claim text.