Automatic zooming device
US5398095A · kind A · utility
7Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1993 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Jul 30, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This zooming device performs auto-zooming by determining the focal length based on the object distance. When the degree of zooming is large, it performs zooming at a speed appropriate to that degree. Further, when a conversion lens is mounted to change the focal length, the device determines focal length while taking into account the degree of change in focal length effected by the conversion lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.