Spectacle lens and method for producing same

• Main Author: Nishimoto, Keiji
• Format: Patent
• Language: English
• Published: 20.07.2017
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CONTACT LENSES; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

One aspect of the present invention pertains to a spectacle lens having reflection characteristics in which the following are satisfied in a lower region in which at least one of an object-side surface and an eye-side surface is positioned lower than a fitting point or the optical center when the lens is worn: (1) the average reflectance at normal incidence in a 400 to 500 nm wavelength region is in a range of 1.0 to 15%; and (2) the average reflectance at normal incidence exceeds the average reflectance at normal incidence in a 400 to 500 nm wavelength region of an upper region positioned higher than the lower region when the lens is worn.