Camera having a plurality of built-in lenses
US4451129A · kind A · utility
70Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1982 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Feb 26, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera having two built-in lenses with selective control of the focal length, wherein a first focal length is obtained by the first lens optical system and, after the first lens optical system has been moved along a lens axis without causing movement of a device for receiving light from an object to be photographed, the second lens optical system is moved to a composite position with the first lens optical system so that a second focal length is obtained by the first and second lens optical systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.