【発明の名称】灯 具

Japanese Patent JP2945376

B1

A lamp is composed of a light source, a composite reflector consisting of a plurality of reflecting surface units, and aspheric lenses provided to correspond to the individual reflecting surface units. The composite reflector includes a first and a second reflecting surface units. Each of the first reflecting surface units is formed of a reflecting surface configuration obtained by cutting, radially around a center axis of the light source, a portion from a spheroid having a first focal point located on the center axis and adjacent the light source and a second focal point located on a line passing through the first focal point and tilted appropriately from the center axis such that the cut portion spans a range of 15° to 90° around the center axis. Each of the second reflecting surface units is composed of a second reflecting surface configuration obtained by similarly cutting a portion from a spheroid having a second focal point located external to the first reflecting surface configuration. The first and second reflecting surface configurations are defined in non-overlapping relation with each other to form effective reflecting surfaces. Of the reflecting surface units, the identical ones are combined concentrically to compose the composite reflector. The aspheric lenses are provided to correspond to the respective second focal points of the reflecting surface units of the composite reflector and converge reflected light beams from the respective reflecting surface units.

Teruo Koike
Futami Takashi
Kawaguchi Yoshifumi

JP12221198A

September 06, 1999

May 01, 1998

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Stanley Electric Co., Ltd.

F21S8/10; F21V5/00; F21V7/00; F21V13/00; F21V17/00; F21S2/00; (IPC1-7): F21M1/00; F21M3/02; F21M3/05; F21Q1/00; F21Q3/00

JP57183606U

Akimoto Teruo

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