ILLUMINATOR HAVING LIGHT TRANSMISSION BODY

摘要

PROBLEM TO BE SOLVED: To uniformly illuminate an irrastrated face with light by forming an area for the reflection/diffusion of a conductor like saw teeth so that teeth are arranged in the longitudinal direction of the rod-like conductor and forming these teeth so that the width of teeth is narrowed in the vicinity of a light source and extended in accordance with separation from the light source. SOLUTION: An area 5 for reflecting/scattering a beam propagated through the inside of the conductor 3 and extracting the beam to the outside of the conductor 3 is constituted so as to form a fine saw tooth-like tooth string on one side face along the longitudinal direction of the conductor 3. The width of the area 5 is set so as to be narrowed in the vicinity of an incident face and extended on a center part separated from any incident face. Since the incident rate of a beam propagated through the inside of the conductor 3 upon the area 5 is reduced on near side of the incident face and increased on the far side, the non-uniformity of illuminance in the longitudinal direction of the conductor 3 is effectively improved.