Maxell, Ltd.

Nippon Petrochemicals Company, Limited

Junichi Yokoyama

Masaaki Ikeda

Atsushi Yusa

Katsufumi Suga

Hideo Kawabata

Masayoshi Kariya

Naoki Hiratoge

Tsuyoshi Maro

An optical apparatus capable of correcting field curvature easily, a method for manufacturing the optical apparatus, and a headlight including the optical apparatus. A lens, a plurality of solid-state light sources, and a substrate on which the solid-state light sources are mounted. The substrate includes a base material, which is rigid, and a mount surface, which is formed on the base material in a curved surface shape that substantially matches a focal plane shape of the lens, and on which a circuit pattern is formed. The solid-state light sources are mounted on the mount surface, and the substrate is positioned with respect to the lens such that a position of a focal plane of the lens substantially coincides with emission surfaces of the solid-state light sources, and thus field curvature can be easily corrected.

Optical apparatus, method for manufacturing optical apparatus, and headlight

A polar group-containing ethylene polymer or copolymer having improved insulating properties, or a composition thereof is characterized in that said polar group-containing ethylene polymer or copolymer contains 20 to 8000 ppm of a polar group having a dipole moment of more than 0.8 debye. The polymer can be used in a power cable as insulation.

Ethylene polymers or copolymers having improved insulating properties,

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Yokohama, Japan

Junichi Yokoyama