Computer-generated holographic display system
AssigneeVividQ Limited
InventorsMark BRANNAN, Alfred James NEWMAN
Life of this patent
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Abstract
Computer-generated holographic display systems are described with improved image quality when used with illumination sources other than single mode lasers, such as broader emission light sources including LEDs and multi-mode lasers.
Claims15
A computer-generated holographic display system having an angular resolution and an angular field of view at a viewing position, the computer-generated holographic display system comprising:
- an illumination system comprising an LED or multimode laser;
- an SLM illuminated by the illumination system;
- and
- an optical system configured to reimage the SLM at a predetermined distance from the viewing position;
- wherein:
- the illumination system has an etendue at the SLM which is less than or equal to a product of the angular resolution at the viewing position and the angular field of view at the viewing position divided by a maximum focal power of a virtual image point with respect to the reimaged SLM;
- and
- the angular resolution is less than about 1 mrad.
A computer-generated holographic display system having an angular resolution at a viewing position and a limiting aperture width, the computer-generated holographic display system comprising:
- an illumination system comprising an LED or multi-mode laser and having a spectral bandwidth and a nominal wavelength;
- an SLM illuminated by the illumination system;
- and
- an optical system configured to reimage the SLM at a predetermined distance from the viewing position;
- wherein:
- the spectral bandwidth divided by the nominal wavelength is less than or equal to the angular resolution divided by the product of the limiting aperture width and a maximum focal power of a virtual image point with respect to the reimaged SLM;
- and
- the angular resolution is less than about 1 mrad.
A computer-generated holographic display system having an angular resolution at a viewing position, the computer-generated holographic display system comprising:
- an illumination system comprising an LED or multi-mode laser and having a spectral bandwidth and a nominal wavelength;
- an SLM illuminated by the illumination system;
- and
- an optical system configured to reimage the SLM at a predetermined distance from the viewing position;
- wherein:
- the spectral bandwidth divided by the nominal wavelength is less than or equal to the angular resolution divided by the product of a maximum focal power of a virtual image point with respect to the reimaged SLM and 7 mm;
- and
- the angular resolution is less than about 1 mrad.
Dependencies are inferred from the claim text.