Focal length changeable camera
US5005038A · kind A · utility
16Cited by
12References
79Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1990 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Jun 27, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B3/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosed camera changes between two focal lengths by bringing or taking a built-in attachment lens into and out of axial alignment with a master lens. A single electric motor serves as the drive source both for changing the focal length and effecting automatic focusing. The attachment lens is brought into axial alignment with the master lens for telephoto operation and taken out of axial alignment with the master lens for standard operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.