Zoom lens system
US5973849A · kind A · utility
3Cited by
11References
80Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1995 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Dec 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/142
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system has a plurality of lens units. Zooming is performed by varying distances between the lens units. A gradient index lens is included in the lens units. The gradient index lens has a gradient index in a direction vertical to an optical axis. The gradient index lens has at least one aspherical surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.