Title:
OPTICAL DEVICE AND IMAGING DEVICE
Document Type and Number:
Japanese Patent JP2014164006
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To secure a sufficient amount of a correction of an image blur at a time of correcting the image blur, and to attain flatness in an optical axis direction.SOLUTION: An optical device has: a light amount adjustment device that includes a first group lens having a concave curve surface shape, a second group lens having a convex curve surface shape, and a plurality of blade members located between the first group lens and the second group lens and having the convex curve surface shape on a first group lens side, and causes a size of an aperture transmitting a flux of light to be changed by rotating the blade member, respectively; image blur correction means for driving the second group lens in a direction orthogonal to an optical axis and correcting an image blur; and movement means for moving the light amount adjustment device in an optical axis direction so that a relative distance along the optical axis direction between the light amount adjustment device and the image blur correction means varies. The distance between the light amount adjustment device and the image blur correction means is shorter in a collapsed state of the optical device than a photographing state thereof.
Inventors:
KATANO KENICHI
Application Number:
JP2013032731A
Publication Date:
September 08, 2014
Filing Date:
February 22, 2013
Export Citation:
Assignee:
CANON KK
International Classes:
G03B5/00; G03B9/02; H04N5/225; H04N5/232
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsuya Mizumoto
Michiya Hirayama
Atsuya Mizumoto
Michiya Hirayama