Zoom lens system
US6038084A · kind A · utility
21Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Oct 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/143507
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system has at least three lens units of, from the most object side, a first lens unit having a negative optical power, a second lens unit having a positive optical power and a third lens unit, wherein the distances between the lens units are varied by moving all of the lens units during zooming. The zoom lens system satisfies the predetermined mathematical condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.