Position detecting device for a zoom lens of a copying machine
US4412737A · kind A · utility
22Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1982 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Mar 17, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A copying machine including a zoom lens is provided with a device for detecting the position of the zoom lens, so that the lens may be correctly positioned at a location corresponding to life or actual size copying. The detector includes a photo-interrupter or the like and a small computer which operates to return the lens to the correct position from any position, but such that the final approach to the correct position is always made from the same direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.