US 11,988,902 B2
Spectacle lens
Sou Miyamoto, Tokyo (JP)
Assigned to HOYA LENS THAILAND LTD., Pathunthani (TH)
Appl. No. 17/279,860
Filed by HOYA LENS THAILAND LTD., Pathumthani (TH)
PCT Filed Sep. 27, 2019, PCT No. PCT/JP2019/038101
§ 371(c)(1), (2) Date Mar. 25, 2021,
PCT Pub. No. WO2020/067407, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 2018-184882 (JP), filed on Sep. 28, 2018.
Prior Publication US 2021/0397024 A1, Dec. 23, 2021
Int. Cl. G02C 3/00 (2006.01); G02C 7/02 (2006.01); G02C 7/10 (2006.01)
CPC G02C 7/107 (2013.01) [G02C 7/104 (2013.01); G02C 7/022 (2013.01); G02C 7/10 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A spectacle lens comprising multilayer films on both surfaces of a lens substrate, wherein
a sum of mean reflectances on both surfaces of the spectacle lens in a wavelength band of 360 to 400 nm is 6.0% or less,
a sum of the mean reflectances on both surfaces of the spectacle lens in a wavelength band of 400 to 440 nm is 20.0% or more,
a sum of the mean reflectances on both surfaces of the spectacle lens in a wavelength band of 480 to 680 nm is 2.0% or less,
a reflectance on each surface of the spectacle lens has at least one maximum value in a wavelength band of 400 to 440 nm, and
a ratio of the mean reflectance on one surface of the spectacle lens to the mean reflectance on the other surface is more than 0 and less than 1.0 in a wavelength band of 400 to 440 nm.