Light amount adjuster, lens barrel, and image pickup device
US7878721B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2008 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | May 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light amount adjuster for adjusting a size of a diaphragm aperture on an optical axis of an optical system, includes: a pair of straight moving diaphragm blades so provided at a portion to which the diaphragm aperture is opposed as to slide along a plane orthogonal to the optical axis in a direction of getting close to or separated from the optical axis; a pair of swing diaphragm blades so provided at a portion to which the diaphragm aperture is opposed as to swing about a center axis in parallel to the optical axis in a direction of getting close to or separated from the optical axis; and a drive mechanism for adjusting the size of the diaphragm aperture by sliding the pair of straight moving diaphragm blades and by allowing the pair of swing diaphragm blades to swing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.