Holographic image projection systems
First Claim
1. A holographic image projector comprising a holographic image projection system for projecting an image at an acute angle onto a surface, the system comprising:
- a spatial light modulator (SLM) to display a hologram;
an illumination system to illuminate said displayed hologram;
projection optics to project light from said illuminated displayed hologram onto said surface at an acute angle to form said image; and
a processor having an input to receive input image data for display and an output to provide hologram data for said spatial light modulator, and wherein said processor is configured to;
input image data;
convert said input image data to target image data;
generate from said target image data hologram data for display as a hologram on said spatial light modulator to reproduce a target image corresponding to said target image data; and
output said hologram data for said spatial light modulator;
wherein said target image is distorted to compensate for said projection of said hologram at said acute angle to form said image;
wherein said holographic image projector is configured to stand on said surface and project downwards onto said surface, away from said projector, at said acute angle; and
wherein diffracted light from a single pixel of said hologram displayed in said SLM contributes to a substantial entirety of said projected image, wherein said diffracted light is distorted, and wherein said conversion of said input image data to said target image data further comprises compensating for variations in per unit area brightness of said projected image due to said acute angle projection by applying a scale factor to a value of a pixel in said target image data, wherein said scale factor is dependent on a location in two dimensions of said pixel in a distorted target image space represented by said target image data.
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Accused Products
Abstract
A holographic image projection system for projecting an image at an acute angle onto a surface includes: a spatial light modulator (SLM) to display a hologram; an illumination system to illuminate the displayed hologram; projection optics to project light from the illuminated displayed hologram onto the surface at an acute angle form the image; and a processor having an input to receive input image data for display and an output to provide hologram data for the SLM, wherein the processor is configured to: input image data and convert this to target image data; generate from the target image data hologram data for display as a hologram on the SLM to reproduce a target image; and wherein the target image is distorted to compensate for the projection of the hologram at an acute angle to form the image.
32 Citations
36 Claims
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1. A holographic image projector comprising a holographic image projection system for projecting an image at an acute angle onto a surface, the system comprising:
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a spatial light modulator (SLM) to display a hologram; an illumination system to illuminate said displayed hologram; projection optics to project light from said illuminated displayed hologram onto said surface at an acute angle to form said image; and a processor having an input to receive input image data for display and an output to provide hologram data for said spatial light modulator, and wherein said processor is configured to; input image data; convert said input image data to target image data; generate from said target image data hologram data for display as a hologram on said spatial light modulator to reproduce a target image corresponding to said target image data; and output said hologram data for said spatial light modulator; wherein said target image is distorted to compensate for said projection of said hologram at said acute angle to form said image; wherein said holographic image projector is configured to stand on said surface and project downwards onto said surface, away from said projector, at said acute angle; and wherein diffracted light from a single pixel of said hologram displayed in said SLM contributes to a substantial entirety of said projected image, wherein said diffracted light is distorted, and wherein said conversion of said input image data to said target image data further comprises compensating for variations in per unit area brightness of said projected image due to said acute angle projection by applying a scale factor to a value of a pixel in said target image data, wherein said scale factor is dependent on a location in two dimensions of said pixel in a distorted target image space represented by said target image data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A holographic image projection system processor comprising:
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an input configured to receive input image data for display; an output configured to provide hologram data for a spatial light modulator (SLM) for displaying a hologram illuminated by an illumination system such that light from the illuminated displayed hologram is projected onto a surface at an acute angle to form an image; wherein the processor is configured to; input image data; convert said input image data to target image data; generate from said target image data hologram data for display as a hologram on the spatial light modulator to reproduce a target image corresponding to said target image data; and output said hologram data for said spatial light modulator; wherein said target image is distorted to compensate for said projection of said hologram at said acute angle to form said image; and wherein diffracted light from a single pixel of said hologram displayed in said SLM contributes to substantially an entirety of said projected image, wherein said diffracted light is distorted, and wherein said conversion of said input image data to said target image data further comprises compensating for variations in per unit area brightness of said projected image due to said acute angle projection by applying a scale factor to a value of a pixel in said target image data, wherein said scale factor is dependent on a location in two dimensions of said pixel in a distorted target image space represented by said target image data. - View Dependent Claims (35, 36)
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Specification