Tokai Optical Co., Ltd.

Miyoshi Oil & Fat Co., Ltd.

Shingo Ono

Hiroshi Ueno

Atsushi Nagao

Hiroaki Watanabe

Koji Kawai

Kotaro Kaneko

Nobuhiro Kaneko

Yuichi Shishino

Hisashi Ikawa

To provide a plastic lens which can absorb light with a wavelength of 400 to 420 nm with sufficiently high efficiency but is reduced in the absorption of light with a wavelength of around 420 nm or longer, is less affected by harmful light, suppresses yellow coloration and therefore has excellent appearance, suppresses yellowish discoloration over time, and has excellent heat resistance, light resistance, and also optical performance, particularly an excellent Abbe's number. The plastic lens is characterized by containing an ultraviolet absorbing agent represented by the following formula (I): (in the formula, Rto Reach independently represent a monovalent group such as a hydrogen atom, Rrepresents a monovalent sulfur-containing group represented by the following formula (i): (in the formula, Rrepresents a divalent hydrocarbon group with 1 to 20 carbon atoms or the like; Rrepresents a divalent hydrocarbon group with 1 to 20 carbon atoms or the like; Rrepresents a monovalent hydrocarbon group with 1 to 20 carbon atoms; the total number of carbon atoms in R, n number of R, and Ris 30 or less; m represents an integer of 0 or 1; and n represents an integer of 0 to 3)), and a resin material.

Plastic lens

A spectacle lens manufacturing system includes resin material filling means which fills a lens mold with a lens material (heat-curable resin material), and at least a portion of the lens mold is formed by a three-dimensional printer. The lens mold includes a front lens mold having a rear surface that defines a front surface of a spectacle lens, a rear lens mold having a front surface that defines a rear surface of the spectacle lens, and a side peripheral lens mold having an inner surface that defines a side periphery of the spectacle lens. The side peripheral lens mold is formed by the three-dimensional printer.

Spectacle lens manufacturing system

A spectacle lens manufacturing system includes resin material filling means which fills a lens mold with a lens material (heat-curable resin material), the lens mold includes a rear lens mold having a front surface that defines a rear surface of a spectacle lens, the rear lens mold has a rear lens mold base body, a three-dimensional printer which adds a aspherical surface addition portion to a front surface of the rear lens mold base body is provided, and a front surface of the rear lens mold is the front surface of the rear lens mold base body, to which the aspherical surface addition portion is added.

Growing community of inventors

Okazaki, Japan

Shingo Ono