Aperture control device and camera
US8744260B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2013 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Mar 26, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An aperture control device includes: an aperture first driving member that controls an aperture of a diaphragm through which light flux passes; an aperture second driving member that drives the aperture first driving member; a motor that drives the aperture second driving member; a detection device that detects start of movement of the aperture first driving member caused by the aperture second driving member driven by the motor; and a motor control device that controls an aperture value of the diaphragm by controlling a rotational amount of the motor after the detection device detects the start of movement of the aperture first driving member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.