Auto focus camera
US4422746A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1981 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | Sep 4, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a camera having a phototaking lens capable of manual focusing operation by an operating ring and automatic focusing operation by a drive control device responsive to the output of an in-focus detecting device and wherein the manual focusing operation and the automatic focusing operation can be selectively accomplished by means of a change-over operating device, there are provided display means capable of displaying information on the in-focus condition of the phototaking lens in response to the output of the in-focus detecting device, focus lock means operable to restrain the movement of the phototaking lens at any position related to the focusing operation of the phototaking lens and at the same time fix the display by the display means, and means for blocking the operation of the focus lock means in response to the selection of the manual focusing operation by the change-over operating device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.