Auto focus detecting device comprising both phase-difference detecting and contrast detecting methods
US5597999A · kind A · utility
56Cited by
11References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 2, 1996 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | Jan 2, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/285
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An auto focus detecting device capable of focus detection by a contrast detecting method and a phase-difference detecting method. In accordance with a condition of an object, either one of detecting method is selected, and then an amount of defocus is calculated based on a result obtained by the selected detecting method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.