Zoom lens with a mechanism for moving a first lens so as to be compactly housed
US4779964A · kind A · utility
21Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1986 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Nov 10, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/1421
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens has at least a first group lens and a second group lens which are spaced a greater distance from each other in one of telephoto setting and wide angle setting than the other setting, and a mechanism for moving the first group lens from said one setting toward an image formation plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.