Wide-angle relay lens and imaging system having same
US8503113B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 7, 2010 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Sep 25, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A relay lens is used for an imaging system having a main lens. The main lens has a pupil plane. The relay lens, in the order from the subject side to the image side thereof, includes a first lens of negative refractive power, and a second lens of positive refractive power. The first lens has a first principal plane and a second principal plane. The second lens has a third principal plane and a fourth principal plane. The relay lens system satisfies the following formulas: 0.53<|ƒ1/ƒ2|<0.57; 1.54<ν1/ν2<3.11; 0.22<D1/D2<0.65, where f1 and f2 are the effective focal lengths of the first and second lenses, v1 and v2 are the Abbe numbers of the first and second lenses, D1 is the distance between the second principal plane and the third principal plane, D2 is the distance between the fourth principal plane and the pupil plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.