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Title:
A light filter and an imaging device
Document Type and Number:
Japanese Patent JP6202230
Kind Code:
B1
Abstract:
可視光の透過性を良好に維持しながら、特に高い入射角における近赤外光の遮蔽性の低下が抑制された光学フィルタの提供。吸収層および反射層を有し、（ｉ−１）入射角０°の分光透過率曲線において、波長４３０〜６２０ｎｍの光の平均透過率が６５％以上であり、かつ、波長６００〜７００ｎｍに透過率５０％を示す波長を有する、（ｉ−２）波長６１５〜７２５ｎｍにおいて、入射角０°および入射角３０°の分光透過率曲線の差分の絶対値を平均した値が８％／ｎｍ以下である、および（ｉ−３）入射角６０°の分光透過率曲線において波長７３０〜１０００ｎｍの光の最大透過率が１５％以下である、の要件を満たす光学フィルタ。

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Inventors:
Kazuhiko Shiono
Keigo Matsuura
Hiroki Hodaka
Application Number:
JP2017515266A
Publication Date:
September 27, 2017
Filing Date:
December 01, 2016
Export Citation:
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Assignee:
Asahi Glass Co., Ltd.
International Classes:
G02B5/22; B32B7/02; G02B5/20; G02B5/26; G02B5/28
Domestic Patent References:
JP2015172102A2015-10-01
Foreign References:
WO2015099060A12015-07-02
WO2012169447A12012-12-13
WO2007148621A12007-12-27
WO2014088063A12014-06-12
Attorney, Agent or Firm:
Patent Business Corporation Sakura International Patent Office



 
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