Flat valley fresnel lens
AssigneeInFocus Corporation
InventorsMark David Peterson, Jeffrey Alan Gohman
Life of this patent
Estimating the term…
Abstract
A Fresnel lens. The Fresnel lens includes an input side configured to receive the image and an output side, opposite the input side, configured to display the image. The input side includes a first facet angled to receive input light constituting at least a portion of the image. The input side also includes a second facet at least partially facing the first facet and a third facet linking the first facet to the second facet, wherein the third facet and the output side are substantially parallel.
Claims20
A Fresnel lens for a display device, the Fresnel lens comprising:
- an input side configured to receive an image from an image projecting assembly, the input side including:
- a first facet angled to receive input light constituting at least a portion of the image,
- a second facet at least partially facing the first facet, and
- a third facet linking the first facet to the second facet;
- and an output side, opposite the input side, configured to display the image, wherein the third facet scatters light traveling from the output side to the third facet.
A display device comprising:
- a lens system to project an image;
- an intermediate mirror to reflect the image projected by the lens system;
- a back plate mirror to receive the image from the intermediate mirror and to reflect the image;
- and
- a Fresnel lens having an input side configured to receive the image from the back plate mirror and an output side, opposite the input side, configured to display the image, wherein the input side includes a first facet angled to receive input light constituting at least a portion of the image, a second facet at least partially facing the first facet, and a third facet linking the first facet to the second facet, wherein the third facet and the output side are substantially parallel.
A Fresnel lens for a display device, the Fresnel lens comprising:
- an input side configured to receive an image from an image projecting assembly, the input side including:
- a first facet angled to receive input light constituting at least a portion of the image,
- a second facet at least partially facing the first facet, and
- a third facet linking the first facet to the second facet;
- and an output side, opposite the input side, configured to display the image, wherein the output side and the third facet are substantially parallel.
Dependencies are inferred from the claim text.