Zoom lens device
US4009942A · kind A · utility
8Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1975 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | May 1, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens device comprises a zooming section including a group of focusing lenses, a group of variator lenses and a group of compensator lenses, and a relay section for focusing the light beam from the zooming section. The zoom lens device permits its zooming section alone to be interchanged with another zooming section. By fitting this other zooming section to the relay section, the zoom lens device having different magnification, and so on can be obtained. The light beam from this other zooming section is substantially equal in aberration and image forming conditions to the light beam from the original zooming section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.