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Title:
LIGHT QUANTITY ADJUSTMENT DEVICE
Document Type and Number:
Japanese Patent JP2013054394
Kind Code:
A
Abstract:

To provide a light quantity adjustment device able to use an infrared ray cutoff filter highly reliably as required without increasing its thickness.

The light quantity adjustment device comprises: a light quantity adjustment mechanism that adjusts a quantity of passing light by changing the area of an aperture; and a filter switching mechanism that moves an infrared ray cutoff filter 43 to the aperture position of the light quantity adjustment mechanism and separates the infrared ray cutoff filter from the aperture position. A separating member 110 facing the infrared ray cutoff filter of the filter switching mechanism is provided with a recessed part (accommodating space) 110b so as not to interfere with the infrared ray cutoff filter.


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Inventors:
TAKADA YOSHIO
Application Number:
JP2012278190A
Publication Date:
March 21, 2013
Filing Date:
December 20, 2012
Export Citation:
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Assignee:
NEW ASIA OPTICAL CORP
International Classes:
G03B11/00; G03B9/02
Domestic Patent References:
JP2010020063A2010-01-28
JP2010527030A2010-08-05
JP2006217686A2006-08-17
JP2010049135A2010-03-04
JP2010020063A2010-01-28
JP2010049135A2010-03-04
JP2006217686A2006-08-17
JP2010527030A2010-08-05
JP2010145706A2010-07-01
JP2010204206A2010-09-16
Attorney, Agent or Firm:
Toshinobu Isobe
Shigeru Kobayashi



 
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