Camera
US5229805A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 1992 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | May 13, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera comprising: a switch for starting a photo-taking sequence; a photo-taking lens system which is able to expand and contract to focus a subject to be photographed in accordance with a projecting operation of the lens; a distance measuring unit for measuring distance to the subject to be photographed; a lens drive unit for driving the lens system to move to expand or contract in accordance with the lens projecting operation; and a first calculation unit for calculating a movement amount of the lens system on the basis of the measurement result transmitted from the distance measuring unit. The camera is featured to comprise a comparator unit for comparing two distance measurement results obtained during one projecting operation of the lens system; a memory unit for memorizing data from the distance measuring unit and first calculation unit. The camera further comprises a second calculation unit for calculating a correction amount of the movement amount of the lens system on the basis of the comparison result transmitted from the comparator means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.