Motion compensation detection device for an optical system
US6173121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Feb 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A motion compensation device which detects vibration of an optical system and can discriminate between undesired movement or vibration of photographic equipment and intentional movement of the photographic equipment and compensate for the undesired movement while not compensating for the intentional movement. The motion compensation device contains a decision unit which calculates a variance value based on an angular velocity signal supplied by am angular velocity sensor. The decision unit then compares this variance value with a predetermined decision level value and determines if a large movement has occurred due to a photographic composition change, panning photography or the operator following of a randomly moving subject. A target value calculation unit, based on the decision result of the decision unit, calculates a target value of vibration motion compensation control to be executed. The target value calculation unit then varies the target value of vibration motion compensation control when large movements are detected by the angular velocity sensor. This motion compensation device may be contained within a lens barrel or camera body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.