Zoom lens control system and method for zooming control
US4735494A · kind A · utility
30Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1986 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | May 19, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/282
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention user plural driving speeds of the focusing lens component of a zoom lens which responds to plural separate control regions of focal length and object position. In each control region, the focusing lens component is driven in predetermined suitable constant speed. By this operation the object is nearly focused on the focal plane. The slight discrepancy between the image position of the object and the ideal plane is regarded as zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.