Freeform optical device and short standoff image projection
First Claim
1. A freeform optical device, comprising an at least partially curved surface having a surface geometry, wherein surface normals at a plurality of locations on the surface geometry are computed to define the surface geometry with respect to a plurality of focal points corresponding to the surface normals at the plurality of locations in order to correct optical aberrations otherwise occurring at the plurality of focal points.
0 Assignments
0 Petitions
Accused Products
Abstract
A freeform optical device is disclosed which has an at least partially curved surface with a surface geometry. Surface normals at multiple locations on the surface geometry can be computed to define the surface geometry with respect to multiple focal points corresponding to the surface normals at the locations in order to correct optical aberrations otherwise occurring at the focal points.
-
Citations
20 Claims
- 1. A freeform optical device, comprising an at least partially curved surface having a surface geometry, wherein surface normals at a plurality of locations on the surface geometry are computed to define the surface geometry with respect to a plurality of focal points corresponding to the surface normals at the plurality of locations in order to correct optical aberrations otherwise occurring at the plurality of focal points.
-
4. An ultra-short standoff image projection system comprising:
-
a display screen; an image projector configured to project an image onto the screen, said projector having a freeform optical lens, the lens comprising an at least partially curved surface having a surface geometry, wherein surface normals at a plurality of locations on the surface geometry are computed to define the surface geometry with respect to a plurality of points on the screen corresponding to the surface normals at the plurality of locations to in order to correct optical aberrations otherwise occurring at the plurality of focal points. - View Dependent Claims (5, 6, 7, 8)
-
-
9. An ultra-short standoff image projection system comprising:
-
a display screen; an image projector configured to project image data; and a computed freeform mirror for reflecting image data from the projector onto the screen, the freeform mirror comprising an at least partially curved surface having a surface geometry, wherein surface normals at a plurality of locations on the surface geometry are computed to define the surface geometry with respect to a plurality of points on the screen corresponding to the surface normals at the plurality of locations in order to correct optical aberrations otherwise occurring at the plurality of focal points. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A process for projecting a short standoff image comprising the steps of:
-
establishing a distance relationship between a display screen and a computed freeform optical device; positioning the computed freeform optical device for passing image data from an image projector onto the display screen, the freeform optical device comprising an at least partially curved surface having a surface geometry, wherein surface normals at a plurality of locations on the surface geometry are computed to define the surface geometry with respect to a plurality of points on the screen corresponding to the surface normals at the plurality of locations in order to correct optical aberrations otherwise occurring at the plurality of focal points; and projecting the image onto the screen via the freeform optical device using the image projector. - View Dependent Claims (17, 18, 19, 20)
-
Specification