Compact zoom lens system
US5446592A · kind A · utility
11Cited by
15References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1993 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Oct 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/143
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact zoom lens system comprises a front negative lens component and a rear positive lens component with a variable air space between the front and the rear lens components. The front negative lens component consists of two lens elements and the rear lens component consists of two or three lens elements. A plurality of aspherical surfaces are employed for the compact zoom lens system. Furthermore, some zoom lens system includes an additional negative lens component having a weak refractive power behind the rear lens component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.