Holographic image display system
AssigneeLight Blue Optics Ltd.
InventorAdrian Cable
Life of this patent
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Abstract
This invention relates to holographic image display systems, and to related methods and processor control code. We describe a method of displaying an image holographically, the method including: inputting display image data defining said image for display; processing said image data to determine first image data representing a first spatial frequency portion of said image data and second image data representing a second spatial frequency portion of said image data, wherein said second spatial frequency is higher than said first spatial frequency; displaying a hologram of said first image data on a spatial light modulator (SLM) to form a holographically-generated intermediate real image; modulating said intermediate real image using said second image data to display said image.
Claims15
A method of displaying an image holographically, the method comprising:
- inputting display image data defining said image for display;
- processing said image data to determine first image data representing a first spatial frequency portion of said image data and second image data representing a second spatial frequency portion of said image data, wherein said second spatial frequency is higher than said first spatial frequency;
- displaying a hologram of said first image data on a spatial light modulator (SLM) to form a holographically generated intermediate real image;
- modulating said intermediate real image using said second image data to display said image;
- wherein said displaying of said hologram comprises phase modulating light from a laser light source using said spatial light modulator, and wherein said modulating of said intermediate real image comprises intensity modulating said intermediate real image using a second spatial light modulator.
A holographic image projection system comprising:
- at least one laser light source;
- a first spatial light modulator (SLM) to phase modulate light from said at least one laser light source;
- intermediate optics to provide an intermediate real image plane at which a real image produced by a hologram on said first SLM is formed;
- a second SLM located at said intermediate real image plane to intensity modulate said real image;
- and
- output optics to project an image of said intensity modulated real image;
- and
- wherein a resolution of said second SLM is greater than a resolution of said first SLM.
Dependencies are inferred from the claim text.