Light image shift correcting device and an optical device
US6539174B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Nov 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/646
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light image shift correcting device is provided with a planar member having a reference surface perpendicular to an optical axis of a focusing optical system, a shift correcting optical member having a flange portion at its periphery, an urger for movably pressing the shift correcting optical member against the reference surface of the planar member at a plurality of parts of the flange portion, a torus type piezoelectric actuator pressed against the flange portion by a part of the urger, and a controller for controlling the torus type piezoelectric actuator. The device can highly precisely control a light image shift correcting optical member despite its simple construction and can be made smaller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.