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US 7,339,742 B2Granted
High brightness optical device
AssigneeLumas Ltd.
InventorsYaakov Amitai, Jonathan Gelberg
Life of this patent
Estimating the term…
Abstract
There is provided an optical device, comprising a display source; a light-diffuser; an imaging optical module, and an output aperture from the optical device characterized in that the light diffuser is an angular, non-uniform diffuser of light for increasing a portion of light emerging from the display source that passes through the output aperture. A method for improving the brightness of an optical display is also provided.
Claims50
An optical device, comprising:
- at least one light source;
- a display source collecting light from the light source, illuminating the display source and emitting light waves;
- at least one converging lens having a first surface;
- a light-diffuser interposed between the display source and the first surface of the lens for non-uniformly diffusing the light;
- and
- an imaging optical module;
- the optical device having an output aperture;
- light waves emerging from a single point on the display source being diverged into predetermined finite solid angles lower than 30° and illuminating the first surface of the lens, such that the light waves from the entire display source cover the output aperture;
- wherein the optical nature and structure of the combination of the light source, converging lens, display source and light diffuser, dictate the solid angles, which result in a specific brightness at said output aperture.
6 more elements
An optical device, comprising:
- at least one light source;
- a display source emitting light waves;
- at least one converging lens collecting light from the light source and illuminating the display source, the converging lens sharing, the same optical axis as the display source;
- a light diffuser for non-uniformly diffusing the light;
- an imaging optical module, and an output aperture from the optical device;
- each light wave emerging from a single point on the display source being diverged into a predetermined finite solid angle such that the light waves from the entire display source cover the output aperture;
- wherein optical nature and structure of the combination of the light source, converging lens, display source and light diffuser, dictate the solid angles, resulting in a specific brightness at the output aperture.
4 more elements
An optical device, comprising:
- at least one light source;
- a display source emitting light waves;
- at least one converging lens collecting light from the light source and illuminating the display source;
- a light diffuser for non-uniformly diffusing the light;
- an imaging optical module the converging lens, display source and imaging optical module forming an on-axis system;
- and
- an output aperture from the optical device;
- each light wave emerging from a single point on the display source being diverged into a predetermined finite solid angle such that the light waves from the entire display source cover the output aperture;
- wherein optical nature and structure of the combination of the light source, converging lens, display source and light diffuser, dictate the solid angles, resulting in a specific brightness at the output aperture.
6 more elements
An optical device comprising:
- at least one light source;
- a display source emitting light waves;
- at least one converging lens collecting light from the light source and illuminating the display source, the display source having a plane and light from the light source being converged by at least one converging lens to a virtual point located beyond the plane;
- a light diffuser for non-uniformly diffusing the light;
- an imaging optical module, and
- an output aperture from the optical device;
- each light wave emerging from a single point on the display source being diverged into a predetermined finite solid angle such that light waves from the entire display source cover the output aperture;
- wherein optical nature and structure of the combination of the light source, converging lens, display source and light diffuser, dictate the solid angles, resulting in a specific brightness at the output aperture.
5 more elements
Dependencies are inferred from the claim text.