Compact zoom lens system
US5424870A · kind A · utility
11Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1992 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Nov 20, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/143103
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact zoom lens system comprises, from the object side, a first lens component of a positive refractive power, a second lens component of a positive refractive power, and a third lens component of a negative refractive power. The first lens component has at least one aspherical surface. There are variable air spaces between the first and second lens components and between the second and third lens components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.