OPTICAL FILM, POLARIZER AND IMAGE DISPLAY UNIT

• Main Authors: NAKAMURA KEISHI, NOMURA TAKAHISA, NAKAGAWA HIROKI, HAMADA TAKANORI, HATA KENTARO, NAKAJIMA MASATAKA
• Format: Patent
• Language: English; Japanese
• Published: 31.10.2023
• Subjects: ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

To provide an optical film that can block blue light, can suppress yellowish coloring, and can be made thin, a polarizer with such an optical film, and an image display unit.SOLUTION: There is provided an optical film 10 that comprises a light-transmissive base material 11 and a light-transmitting function layer 12 provided on one surface side of the light-transmissive base material 11, and also has a spectral transmission factor of less than 1% at a wavelength of 380 nm, equal to or greater than 10% and less than 60% at 410 nm, and equal to or greater than 70% at 440 nm, and the light-transmitting function layer 12 is 9 μm or smaller thick.SELECTED DRAWING: Figure 1 【課題】ブルーライトを遮蔽でき、黄色味を抑制でき、かつ薄型化を図ることができる光学フィルム、このような光学フィルムを備える偏光板および画像表示装置を提供する。【解決手段】光透過性基材１１と、光透過性基材１１の一方の面側に設けられた光透過性機能層１２とを備える光学フィルム１０であって、波長３８０ｎｍにおける分光透過率が１％未満であり、波長４１０ｎｍにおける分光透過率が１０％以上６０％未満であり、かつ波長４４０ｎｍにおける分光透過率が７０％以上であり、光透過性機能層１２の膜厚が、９μｍ以下である、光学フィルム１０が提供される。【選択図】図１