Projection zoom lens and camera
US9835835B1 · kind B1 · utility
20Cited by
33References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2016 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Apr 11, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection zoom lens assembly for a digital cinema projection system includes three optical groups. A first optical group includes one or more wide angle lenses for projecting digital cinema images. A second optical group includes a set of zoom optical groups each comprising two or more lenses, including a first independently movable zoom group, a second independently movable zoom group, and a third zoom group. A third optical group includes multiple lenses for receiving images for projection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.