Zoom optical system with a prescribed conjugate distance
US6781767B2 · kind B2 · utility
2Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Aug 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/143103
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom optical system has a focus adjusting unit that performs focusing for an object by moving along an optical axis thereof and a magnification adjusting unit that corrects a change in optical magnification caused by the focusing by moving along an optical axis thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.