Linear lighting equipment

Abstract

Abstract PURPOSE: To equalize an intensity distribution of a projected light beam by a simple constitution, by placing a light source and an incident end of a plate-like light guide in one focus and the other focus, respectively, of an elliptical cylinder part of a cylindrical mirror consisting of junction of a half-elliptical cylinder and a half- circular cylinder. CONSTITUTION: A mirror cylinder 1 is provided with an elliptical cylinder part 2 and a cylinder part 3, and a light source 7 and an incident end 6 of a plate-like light guide 5 are placed in one focus and the other focus, respectively, of the elliptical cylinder part 2. Also, the light source is formed so as to be placed in the center position of curvature of the cylinder part 3. A light beam proceeding to the front from the light source 7 is reflected by a cold mirror surface 2a, is condensed onto the incident end 6, and the light beam proceeding to the rear is reflected by a cold mirror 3a, and after that, is condensed onto the incident surface 6 by the cold mirror 2a. Its light beam is reflected to a multipath in the light guide, and is projected from an projection end 8. In this way, an intensity distribution of a projected light beam is equalized by a simple constitution. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Takashi Murakami
• 👤 Takeshi Higuchi

Bibliographic Details