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Patent Searching and Data


Title:
FOCAL-PLANE SHUTTER, OPTICAL DEVICE, AND METHOD FOR ADJUSTING CURRENT FOR FOCAL-PLANE SHUTTER
Document Type and Number:
WIPO Patent Application WO/2014/208120
Kind Code:
A1
Abstract:
A focal-plane shutter comprises: a mechanical section including a substrate with an opening, and a front curtain and a rear curtain capable of opening and closing the opening; and a front curtain actuator and a rear curtain actuator which drive the front curtain and the rear curtain respectively and include a front curtain coil and a rear curtain coil respectively. The value of current flowing in the front curtain coil and/or the rear curtain coil is adjusted so that the variation in either a front-curtain warm-up time or a rear-curtain warm-up time due to temperature change corresponds to the variation in the other warm-up time.

Inventors:
OISHI SEIICHI (JP)
MURATA MINORI (JP)
TOKURA SHOICHI (JP)
TAKAHASHI HIROSHI (JP)
Application Number:
PCT/JP2014/053719
Publication Date:
December 31, 2014
Filing Date:
February 18, 2014
Export Citation:
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Assignee:
SEIKO PRECISION KK (JP)
International Classes:
G03B9/36
Foreign References:
JP2002139771A2002-05-17
JPS61185734A1986-08-19
JP2012215658A2012-11-08
JP2002116478A2002-04-19
JP2003015189A2003-01-15
JPH0450827U1992-04-28
Attorney, Agent or Firm:
KATAYAMA, SHUHEI (JP)
Shuhei Katayama (JP)
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