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Title:
LIGHT-SHIELDING FILM AND PRODUCTION METHOD OF THE SAME, AND DIAPHRAGM, SHUTTER BLADE AND LIGHT QUANTITY CONTROLLING DIAPHRAGM BLADE USING THE SAME
Document Type and Number:
Japanese Patent JP2014153522
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light-shielding film and a production method of the film excellent in light-shielding property, low reflection property, sliding property, conductivity, heat resistance and resistance to high temperature and high humidity, to be used for optical apparatus components such as a diaphragm, a shutter blade or a diaphragm blade of a mobile phone with a camera, a digital camera or a lens shutter of a digital video camera, or a light quantity controlling diaphragm blade of a projector.SOLUTION: The light-shielding film comprises: a resin film substrate (A) having a surface roughness of 0.2 to 2.2 μm in terms of an arithmetic average height Ra; a Ni-based metal film (B) having a film thickness of 50 to 250 nm formed on one surface or both surfaces of the resin film substrate (A) by a sputtering process; and a Ni-based metal oxide film (C) having a film thickness of 100 to 400 nm on the Ni-based metal film (B). The Ni-based metal film (B) has an oxygen content of 0.20 or less in terms of O/Ni atomic number ratio; and the Ni-based metal oxide film (C) has an oxygen content of 0.65 to 0.85 in terms of O/Ni atomic number ratio. The light-shielding film has a minimum optical density of 4 or more and a maximum regular reflectance of 0.4% or less at a wavelength of from 380 to 780 nm.

Inventors:
ONO KATSUSHI
Application Number:
JP2013022958A
Publication Date:
August 25, 2014
Filing Date:
February 08, 2013
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO LTD
International Classes:
G03B9/02; G02B5/00; G03B9/10
Domestic Patent References:
JP2010001518A2010-01-07
JP2011186390A2011-09-22
JP2012203309A2012-10-22
JP2008158479A2008-07-10
JP2008216951A2008-09-18
JP2012247518A2012-12-13
JP2010175653A2010-08-12
JP2012203310A2012-10-22
JP2010001518A2010-01-07
JP2011186390A2011-09-22
JP2012203309A2012-10-22
JP2008158479A2008-07-10
JP2008216951A2008-09-18
JP2012247518A2012-12-13
JP2010175653A2010-08-12
JP2012203310A2012-10-22
Foreign References:
WO2010026853A12010-03-11
WO2007125875A12007-11-08
WO2010026853A12010-03-11
WO2007125875A12007-11-08
Attorney, Agent or Firm:
Kenji Kawabi



 
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