Title:
OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2022/014478
Kind Code:
A1
Abstract:
According to the present invention, it is possible to provide an optical film in which a wavelength dispersion characteristic at wavelengths of 400-800 nm satisfies the following general formula (1) (where, the value of a is 1500 < a < 6600, the value of b is 1.17 < b < 1.27, Δλ represents a photoelastic coefficient at an arbitrary wavelength λnm in a 400-800 nm range, and Δ550 represents a photoelastic coefficient at a wavelength of 550 nm) and which has a thickness of 10-1000 μm.
Inventors:
KATO NORIYUKI (JP)
IKEDA SHINYA (JP)
HIRAKAWA MANABU (JP)
IKEDA SHINYA (JP)
HIRAKAWA MANABU (JP)
Application Number:
PCT/JP2021/025892
Publication Date:
January 20, 2022
Filing Date:
July 09, 2021
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
G02B5/30
Domestic Patent References:
| WO2018016516A1 | 2018-01-25 | |||
| WO2019044875A1 | 2019-03-07 | |||
| WO2017175693A1 | 2017-10-12 | |||
| WO2020080199A1 | 2020-04-23 | |||
| WO2020189409A1 | 2020-09-24 | |||
| WO2008130033A1 | 2008-10-30 | |||
| WO2018016516A1 | 2018-01-25 | |||
| WO2019044875A1 | 2019-03-07 |
Foreign References:
| JP5489669B2 | 2014-05-14 | |||
| JP2818398B2 | 1998-10-30 |
Other References:
See also references of EP 4184225A4
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
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