Projection lens system with high resolution and compact size
US8605369B2 · kind B2 · utility
1Cited by
1References
19Claims
0Family size
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Key dates
| Filing date | Dec 20, 2011 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Jun 17, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- 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, and a second lens group with a positive refracting power. The first lens group includes a first lens having a negative refracting power. The projection lens system satisfies the following condition:4.5<|F1|/F<6;wherein F1 is the effective focal length of the first lens; F is the effective focal length of the projection lens system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.