Patent ID: 11966102
Assignee: TOKAI OPTICAL CO. LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A spectacle lens comprising
an optical multilayer film formed on at least one surface side of a base,
wherein a first peak value in a reflectance distribution appears in a wavelength range of 440 nm to 460 nm, and a second peak value appears in a wavelength range of 620 nm to 640 nm,
wherein a blue light ray cutting rate, calculated by using a calculation formula according to Japanese Industrial Standards “JIS T7333 Appendix C,” is not less than 7%, and
wherein a YI value, derived according to an equation YI=100 (1.2769X−1.059Z)/IY, using tri-stimulus X, Y and Z values of a sample in a standard illuminant in an XYZ color system, is not greater than 6.