LIGHT AMOUNT CONTROLLER, IMAGING APPARATUS, AND OPTICAL INSTRUMENT

Japanese Patent JP2017058443

A

PROBLEM TO BE SOLVED: To solve a problem in which it is difficult to design a thin light amount controller in a light passing direction to secure clearance of light amount controlling blades.SOLUTION: A light amount controller includes: a plurality of light amount controlling blades having substrate parts in which revolving shafts and operation shafts are provided upright and blade plate parts; a first member rotatably supporting each of the revolving shafts of the plurality of light amount controlling blades juxtaposed in a circular ring shape around a predetermined center opening; and a second member that moves each of the operation shafts of the plurality of light amount controlling blades, rotates each of the light amount controlling blades about each of the revolving shafts, and changes a shielding amount of the center opening made by the plurality of light amount controlling blades and thereby changing the amount of light passing through the center opening. The light amount controlling blade is arranged in a state where at least one portion of the blade plate part overlaps with its adjacent blade plate part of another light amount controlling blade in a light passing direction. The blade plate part is formed inclined to the substrate part in at least its portion overlapping with the blade plate part of another light amount controlling blade.SELECTED DRAWING: Figure 5

TERAHARA DAISUKE

JP2015181683A

March 23, 2017

September 15, 2015

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RICOH IMAGING CO LTD

G03B9/06

JP2015049430A	2015-03-16
JP2008203576A	2008-09-04
JP2014164049A	2014-09-08

WO2013005436A1

2013-01-10

Shuhei Matsuoka
Eihiro Oyama
Munetaka Yamaga

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