Taking lens system
US5872660A · kind A · utility
15Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Mar 24, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/177
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The object of the present invention is to provide a taking lens system that has an exit pupil located at or close to infinity and has a short total length. In order to achieve said object, the present invention comprises, from the object side, a main optical system comprising a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, and a condenser lens that is located between said main optical system and the image plane and has a positive refractive power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.