Title:
LIGHT-AMOUNT ADJUSTMENT DEVICE
Document Type and Number:
Japanese Patent JP2017003605
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light-amount adjustment device that adjusts an opening area of a stop with a uniform amount of light kept with an attachable/detachable size only by forming a small slit in a main body device.SOLUTION: A light-amount adjustment device 10 includes a diaphragm mechanism in which an opening edge of a diaphragm is moved to thereby change an opening area and then an amount of passing light is adjusted, and the diaphragm mechanism comprises: an arm 31 that transmits drive force from a motor 11; and light shield members 32 to 35 that move due to the drive force to be transmitted by the arm, and thereby change an opening area of the diaphragm. The light shield members 32 and 33 are reciprocally moved in a linear direction, and mutual opening edges 32d and 33d get proximity or are spaced apart, and the light shield members 34 and 35 cause a movement of opening edges 34d and 35d in a crossing direction to the linear movement direction of the light shield members 32 and 33 to change the opening area of the diaphragm.SELECTED DRAWING: Figure 4
Inventors:
TAKADA YOSHIO
Application Number:
JP2015113843A
Publication Date:
January 05, 2017
Filing Date:
June 04, 2015
Export Citation:
Assignee:
NEW ASIA OPTICAL CORP
International Classes:
G03B9/02
Attorney, Agent or Firm:
Patent Business Corporation Tani/Abe Patent Office
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