System and method for uniformity of illumination for tungsten light
US5159485A · kind A · utility
66Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1992 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Mar 17, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B19/0047
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed an optic system for illuminating a DMD array in a manner for efficient light transfer to an imaging lens. The DMD is positioned between the light source and the lens aperture. An anamorphic optic path is arranged such that the vertical component of the light is compressed to match the physical shape of the DMD array. In this manner the horizontal light component is focused directly on the aperture while the vertical light component is focused optically ahead of the aperture. Together the two light components entirely fill the lens aperture while providing more light intensity at the DMD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.