PHOTOCHROMIC OPTICAL ARTICLE
PROBLEM TO BE SOLVED: To provide a photochromic optical article having both antiglare and transparency properties even under conditions where light of a wavelength shorter than 380 nm is blocked.SOLUTION: A photochromic optical article is provided that includes a photochromic compound whose absorban...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a photochromic optical article having both antiglare and transparency properties even under conditions where light of a wavelength shorter than 380 nm is blocked.SOLUTION: A photochromic optical article is provided that includes a photochromic compound whose absorbance at 420 nm is 0.100 or more, whose absorbance at 430 nm is 0.015 or more, and in which, when color optical density is measured, a value of color optical density measured under a state where light of a wavelength of 380 nm or less is substantially 100% blocked divided by a value of color optical density measured under a state in which light of the wavelength of 380 nm or less is not blocked becomes 0.60 or more.SELECTED DRAWING: None
【課題】 380nmより短波長の光を遮った条件下であっても、防眩性、および透過性の両方の特性を備えたフォトクロミック光学物品を提供することである。【解決手段】 420nmにおける吸光度が0.100以上、430nmにおける吸光度が0.015以上であり、かつ、発色濃度を測定するに際し、380nm以下の波長の光を実質的に100%遮断した状態で測定した発色濃度の値を、380nm以下の波長の光を遮断しない状態で測定した発色濃度の値で除した値が0.60以上となるフォトクロミック化合物を含有してなるフォトクロミック光学物品を提供する。【選択図】 なし |
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