Kyowa Hakko Kogyo Co., Ltd.

Yamamoto Kogaku Co., Ltd.

Yamamoto Kogaku Ltd.

Oritoshi Murata

Ikuo Shimizu

Shoshiro Matsushita

Yoshihisa Ishiba

Masahiko Okamoto

Kazuko Mabuchi

A lens for eyeglasses and a molded synthetic resin for light transmitting filters are disclosed, which can reduce the glare of light and can provide a clear color sense, while retaining the lightness in the field of vision. The lens for eyeglasses and the molded synthetic resin for light transmitting filter are made of a synthetic resin base material comprising an organic dye with an absorption maximum in the vicinity of the central wavelength on the standard relative visibility curve, as well as an ultraviolet light absorbing agent and a blue light absorbing agent, the base material having a transmittance minimum in the range of wavelength extending from 550 to 585 nm on the transmittance curve, the transmittance of light at the transmittance minimum being not greater than 25%, the average transmittance of light over the range of wavelength extending from 590 to 660 nm being not less than 15%, and the average transmittance over the range of wavelength extending from 470 to 550 nm being not less than 10%. The above synthetic resin base material in the lens or the molded synthetic resin may further comprise an infrared light absorbing or reflecting agent.

Eyeglass lens and molded material of synthetic resin having

A composite molded article including a polarizer of polycarbonate is provided which is excellent in impact resistance and allows for the manufacture of an eyesight-corrective polarizing lens for eyeglasses, and which comprises a protective layer 2 formed of an annealed or stretched polycarbonate material, a layer to be polished 4 including an untreated layer 6 formed of a polycarbonate material as injection-molded which is not annealed or stretched, and a polarizing film 3 which are superposed one on another in stack with the polarizing film 3 interposed between the protective layer 2 and the layer to be polished 4, the layer to be polished 4 being greater in thickness than the protective layer 2.

Composite molded article including a polarizer of polycarbonate

Growing community of inventors

Higashiosaka, Japan

Oritoshi Murata