Zoom lens system
US6101044A · kind A · utility
6Cited by
6References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Oct 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4277
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system has, from the object side, a first lens unit having a negative optical power and including at least one diffractive optical surface and a second lens unit having a positive optical power and including at least one diffractive optical surface. A distance between the first and second lens units varies during zooming operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.