Variable focus camera
US4789875A · kind A · utility
8Cited by
9References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1987 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Jun 10, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B3/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Variable focus camera includes primary and secondary lens systems, in which only the primary lens system is used for wide angle shots while the combination of the primary with the secondary lens system is used for telephoto shots. The variable focus camera can exactly and positively control the focus change region, the automatic focusing region and other regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.