Title:
光学材料
Document Type and Number:
Japanese Patent JP7233542
Kind Code:
B2
Abstract:
An optical material for which the following (1) to (3) are satisfied by a transmittance curve in a case in which the optical material is measured at a thickness of 2 mm, and for which a∗ is from -4 to 1 and b∗ is from -1 to 11 as a hue in a CIE 1976 (L∗, a∗, b∗) color space: (1) the transmittance curve has a maximum value T1 of transmittance at a wavelength of from 400 nm to 445 nm, and the maximum value T1 is 65% or more; (2) the transmittance curve has a minimum value T2 of transmittance at a wavelength of from 445 nm to 485 m, and the minimum value T2 is from 60% to 90%; and(3) a minimum value of transmittance at a wavelength of from 650 nm to 800 nm is 75% or more, and an average value of transmittance at a wavelength of from 650 nm to 800 nm is 80% or more.
Inventors:
Nobuo Kawato
Manami Takenaka
Manami Takenaka
Application Number:
JP2021537297A
Publication Date:
March 06, 2023
Filing Date:
July 31, 2020
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
G02B5/22; C08K5/3415; C08K5/56; C08L101/00; C09B47/10; G02C7/00
Domestic Patent References:
| JP2017515822A | ||||
| JP2020094214A | ||||
| JP2020132596A |
Foreign References:
| WO2014119042A1 | ||||
| WO2018062385A1 | ||||
| CN109912607A |
Attorney, Agent or Firm:
Patent Attorney Corporation Taiyo International Patent Office