Invention Grant
- Patent Title: Spectacle lens and spectacles
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Application No.: US17161810Application Date: 2021-01-29
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Publication No.: US11966102B2Publication Date: 2024-04-23
- Inventor: Hirotoshi Takahashi
- Applicant: TOKAI OPTICAL CO., LTD.
- Applicant Address: JP Okazaki
- Assignee: Tokai Optical Co., Ltd.
- Current Assignee: Tokai Optical Co., Ltd.
- Current Assignee Address: JP Okazaki
- Agency: BURR PATENT LAW, PLLC
- Priority: JP 18179148 2018.09.25
- Main IPC: G02C7/10
- IPC: G02C7/10 ; G02B1/11 ; G02B5/28 ; G02C7/02

Abstract:
A spectacle lens includes an optical multilayer film formed on at least one surface of a base. The spectacle lens is formed such that, in a reflectance distribution in a visible region, maximal values appear in a range of wavelengths that are not less than 440 nm and not greater than 460 nm and in a range of wavelengths that are not less than 620 nm and not greater than 640 nm. A blue light ray cutting rate calculated by using a calculation formula described in Japanese Industrial Standards “JIS T7333 Appendix C” is not less than 7% (preferably not less than 8%) in the spectacle lens. A YI value is not greater than 6 in the spectacle lens.
Public/Granted literature
- US20210149221A1 SPECTACLE LENS AND SPECTACLES Public/Granted day:2021-05-20
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