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Patent Searching and Data


Title:
OPTICAL FILTER AND NEAR-INFRARED RAY CUT FILTER
Document Type and Number:
WIPO Patent Application WO/2017/022658
Kind Code:
A1
Abstract:
This optical filter in which an optical multi-layer film is provided on a substrate is characterized in that a refractive index adjustment layer and a property improvement layer that has a stress adjusting function are formed, in this order from the substrate side, between the substrate and the optical multi-layer film, wherein the refractive index adjustment layer is formed of one to three layers, and the property improvement layer is a single-layer film of which the physical film-thickness is 600 nm or greater. Accordingly, an optical filter is provided in which a substrate is less susceptible to warpage and which has an excellent spectral diffraction property.

Inventors:
TATEMURA MITSUYUKI (JP)
Application Number:
PCT/JP2016/072290
Publication Date:
February 09, 2017
Filing Date:
July 29, 2016
Export Citation:
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Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
G02B5/28; B32B7/02; G02B1/115
Domestic Patent References:
WO2014168189A12014-10-16
Foreign References:
JP2006349775A2006-12-28
JP2007041347A2007-02-15
JP2010210782A2010-09-24
JP2007156321A2007-06-21
JPH05341122A1993-12-24
Attorney, Agent or Firm:
SAKURA PATENT OFFICE, P.C. (JP)
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