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Title:
OPTICAL LAYER
Document Type and Number:
Japanese Patent JP2018109743
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an optical layer that is excellent in infrared transmission characteristic, visible light shielding characteristic, and weather resistance.SOLUTION: An optical layer 10 of the present invention is an optical layer used as a cover member that covers an infrared receiving part in an infrared radar that is mounted on a movable body, and comprises a first layer containing: aromatic polycarbonate that transmits visible light and has aromatic rings in its principal chain; a light absorber that is contained in the aromatic polycarbonate and comprises at least one of a first light absorber that absorbs light with a wavelength of 300 nm or more and 550 nm or less, a second light absorber that absorbs light with a wavelength of 450 nm or more and 800 nm or less, and a third light absorber that absorbs light with a wavelength of 400 nm or more and 800 nm or less; and a fourth light absorber that absorbs light with a wavelength of 100 nm or more and 400 nm or less.SELECTED DRAWING: Figure 1

Inventors:
FUNAKOSHI YUICHIRO
YAMAMOTO KATSUHIRO
Application Number:
JP2017223184A
Publication Date:
July 12, 2018
Filing Date:
November 20, 2017
Export Citation:
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Assignee:
SUMITOMO BAKELITE CO
International Classes:
G02B5/22; B60R21/00; G03B11/00
Domestic Patent References:
JP2010002704A2010-01-07
JP2014063144A2014-04-10
JP2016184172A2016-10-20
JP2009163197A2009-07-23
JP2014021131A2014-02-03
JP2004198617A2004-07-15
JP2015184666A2015-10-22
JP2008009238A2008-01-17
Foreign References:
WO2016186050A12016-11-24
WO2015056734A12015-04-23
WO2013168565A12013-11-14
WO2006118277A12006-11-09
Attorney, Agent or Firm:
Tatsuya Masuda
Kazuo Asahi



 
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