Title:
LIGHT AMOUNT ADJUSTMENT DEVICE AND OPTICAL APPARATUS
Document Type and Number:
Japanese Patent JP2017040720
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light amount adjustment device that maintains, without increasing the number of components, the function thereof even in a case when a light amount adjustment member is brought into contact with a lens group due to unexpected impact force applied to a camera when the camera is used.SOLUTION: The light amount adjustment device is provided with: the light amount adjustment member that uses a rotatable rotor magnet as a driving source and is retractable with respect to a light passage port along with the rotation of the rotor magnet; and a device substrate that supports a driving unit. A structure that restricts the light amount adjustment member from moving by a certain amount or greater in a direction orthogonal to a rotation direction for being retracted to the light passage port is provided at a place farther than the light passage port of a bottom board with respect to a rotational axis of the light amount adjustment member.SELECTED DRAWING: Figure 4
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Inventors:
KAWAKUBO NAOKI
Application Number:
JP2015161195A
Publication Date:
February 23, 2017
Filing Date:
August 18, 2015
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G03B9/02; G03B11/00