申请人:Mitsui Chemicals, Inc.
公开号:EP2963456A1
公开(公告)日:2016-01-06
An optical material of the present invention includes: a phosphor which has an excitation wavelength in a range from 220 nm to 500 nm, a fluorescence wavelength in a range from 380 nm to 650 nm, a maximum excitation wavelength in a range from 350 nm to 400 nm, and a maximum fluorescence wavelength in a range from 400 nm to 500 nm; and an ultraviolet light absorber, and the light transmittance thereof measured at a thickness of 2 mm satisfies the following features (1) to (3) :
(1) The light transmittance at a wavelength of 440 nm is 80% or higher.
(2) The light transmittance at a wavelength of 420 nm is 70% or lower.
(3) The light transmittance at a wavelength of 410 nm is 5% or lower.
本发明的一种光学材料包括:荧光粉,其激发波长在 220 nm 至 500 nm 之间,荧光波长在 380 nm 至 650 nm 之间,最大激发波长在 350 nm 至 400 nm 之间,最大荧光波长在 400 nm 至 500 nm 之间;紫外线吸收剂,其在厚度为 2 mm 时的透光率满足以下特征(1)至(3):
(1) 波长为 440 纳米时的透光率为 80%或以上。
(2) 波长为 420 纳米时的透光率为 70% 或更低。
(3) 波长为 410 纳米时的透光率为 5%或更低。