Title:
DIAPHRAGM DEVICE, LENS BARREL, AND IMAGING DEVICE OR PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/105401
Kind Code:
A1
Abstract:
A diaphragm device 10 comprises: a diaphragm blade 100 having a first fixed boss 120 projecting from one surface of a first flat plate 102 in a first direction and a moving boss 130 projecting from the other surface in a second direction; a light shielding blade 200 having a second fixed boss 220 projecting from one surface of a second flat plate 202 in the first direction and making a pair with the diaphragm blade 100; a driving ring 300 having a first cam groove 330 formed therein; and a case 400 for storing the diaphragm blade 100, the light shielding blade 200, and the driving ring 300. The light shielding blade 200 is further provided with a second cam groove 230, the moving boss 130 of the diaphragm blade 100 is inserted in the second cam groove 230 of the light shielding blade 200 and is inserted in the first cam groove 330 of the driving ring 300, and the first fixed boss 120 and the second fixed boss 220 are arranged at mutually different distances from an optical axis OA. The present invention can provide a diaphragm device that allows for more diaphragm blades.
Inventors:
HANAOKA TAKAFUMI (JP)
Application Number:
PCT/JP2017/042022
Publication Date:
June 14, 2018
Filing Date:
November 22, 2017
Export Citation:
Assignee:
NITTOH INC (JP)
International Classes:
G03B9/06
Foreign References:
| JP2011215319A | 2011-10-27 | |||
| JP2006154312A | 2006-06-15 | |||
| JP2016133626A | 2016-07-25 | |||
| JPS4326691B1 | 1968-11-16 |
Other References:
See also references of EP 3553599A4
Attorney, Agent or Firm:
MATSUO, Nobutaka (JP)
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