OPTICAL FILTER AND IMAGE CAPTURING DEVICE

To provide an optical filter which offers good visible light transmissivity and suppresses deterioration of near-infrared shielding capability at high incident angles.SOLUTION: An optical filter provide herein comprises an absorptive layer containing a near-infrared absorbing dye and a transparent r...

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Bibliographic Details
Main Authors SUZUKI SHIYOUKO, SHIONO KAZUHIKO, YAMADA SAYURI, HODAKA HIROKI
Format Patent
LanguageEnglish
Japanese
Published 21.05.2024
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:To provide an optical filter which offers good visible light transmissivity and suppresses deterioration of near-infrared shielding capability at high incident angles.SOLUTION: An optical filter provide herein comprises an absorptive layer containing a near-infrared absorbing dye and a transparent resin, and a reflective layer, the absorptive layer having a thickness in a range of 0.3-10 μm, and satisfies specific characteristics (1)-(5).SELECTED DRAWING: Figure 1 【課題】可視光の透過性が良好で、高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。【解決手段】近赤外線吸収色素及び透明樹脂を含有する吸収層と、反射層とを備え、前記吸収層の厚さが０．３～１０μｍであり、特定の特性（１）～（５）をすべて満たす光学フィルタ。【選択図】図１
Bibliography:Application Number: JP20240039407