Optical film, polarizing plate, and image display device

The invention provides an optical film, a polarizing plate and an image display device. The functional layer of the optical film contains an ultraviolet absorber containing nitrogen atoms, the film thickness of the functional layer is 1 [mu] m to 10 [mu] m, and when the strength of secondary ions in...

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Main Authors ISOJIMA SEIICHI, KURODA TAKASHI, HORII KANA, NOMURA TAKAHISA, NANAUMI MAKOTO, HIRUMA YUSUKE, HORIO TOMOYUKI
Format Patent
LanguageChinese
English
Published 12.01.2024
Subjects
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:The invention provides an optical film, a polarizing plate and an image display device. The functional layer of the optical film contains an ultraviolet absorber containing nitrogen atoms, the film thickness of the functional layer is 1 [mu] m to 10 [mu] m, and when the strength of secondary ions in the depth direction of the functional layer is measured by time-of-flight secondary ion mass spectrometry, the strength of the secondary ions in the depth direction of the functional layer is less than or equal to 10 [mu] m. The ratio of the intensity of the secondary ions of the ultraviolet light absorber source in the second region having a thickness of 0.3 [mu] m to the intensity of the secondary ions of the ultraviolet light absorber source in the first region having a thickness of 0.3 [mu] m is 1.1-4.0 (inclusive); the ratio of the intensity of the secondary ions derived from the ultraviolet light absorber in a third region having a thickness of 0.3 [mu] m to the intensity of the secondary ions derived from t
Bibliography:Application Number: CN202311461461