Contrast enhancing system
US8902485B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2012 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Jun 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A contrast enhancing system is provided comprising: a digital micromirror device (DMD); a light source; a first integrator that receives light from the light source, comprising lateral long and short dimensions, the lateral short dimension at a non-zero angle to the DMD tilt axis; a second integrator that receives and shapes light from the first integrator; a telecentric lens about midway between the integrators that generates fast and slow f-number directions of the light in angle space, respectively corresponding to the lateral long and short dimensions of the first integrator, the slow f-number direction correspondingly at the non-zero angle to the DMD tilt axis, thereby increasing dead-zones between adjacent ones of a DMD illumination path and DMD reflection paths for each of the on, flat and off-state positions; and, at least one optical component that focuses the light along the illumination path from the second integrator onto the DMD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.