Projection lens system with high resolution and compact size
US8451548B2 · kind B2 · utility
1Cited by
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14Claims
0Family size
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Key dates
| Filing date | Nov 8, 2011 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Dec 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection lens system includes, in order from the magnified side to the reduced side thereof, a first lens group with negative refractive power, a second lens group with a positive refracting power, and a spatial light modulator. The projection lens system satisfies the following condition: 3.478<BFL/F<3.528. Wherein: BFL is a back focal length of the projection lens system; F is an effective focal length of the projection lens system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.