US 2010/0142016 A1 · HOLOGRAPHIC IMAGE PROJECTION SYSTEMS

Abstract

We describe a holographic image projection system for projecting an image at an acute angle onto a surface, the system including: 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 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 SLM, wherein said processor is configured to: input image data and convert this to target image data; generate from said target image data hologram data for display as a hologram on the SLM to reproduce a target image; and wherein said target image is distorted to compensate for said projection of said hologram at an acute angle to form said image.

Claims29

Dependent claims

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 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;
and
wherein said target image is distorted to compensate for said projection of said hologram at an acute angle to form said image.

9 more elements

A method of projecting an image onto a surface at an acute angle, the method comprising:

inputting display image data defining an image for display;
processing said display image data to generate target image data defining a target image for projection, wherein said target image comprises a version of said image for display distorted to compensate for projection onto said surface at said acute angle;
performing a holographic transform on said target image defined by said target image data to generate hologram data for a hologram of said target image;
displaying said hologram data on a spatial light modulator illuminated by at least one laser;
and
projecting light from said at least one laser modulated by said hologram data displayed on said spatial light modulator onto said surface at said acute angle, to reproduce a substantially undistorted version of said image on said surface.

3 more elements

Dependencies are inferred from the claim text.

Holographic image projection systems

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Holographic image projection systems

Life of this patent

Abstract

Claims29