Forming method for optical bar

Abstract

Abstract PURPOSE:To form a continuous optical bar having roughly uniform width and luminance by forming an optical element by bundling optical fibers, and allowing a light beam to be made incident on this optical element almost perpendicularly to the axis thereof. CONSTITUTION:A light beam is made incident on an optical element almost perpendicularly to the axis thereof. That is to say, when a light beam 10 is radiated to an optical element 1, the light beam is made incident on an optical fiber 3 in the optical element 1, a part of the light beam transmits through this optical fiber 3 and refracted, the other part of the light beam is brought to a total reflection in this optical fiber 3, and thereafter, transmits through and refracted, and these transmission light beams proceed to other optical fiber 3 of the vicinity, and transmit, refracted and brought to a total reflection again. As a result, the light beam is diffused in all peripheral directions in the optical element 1 and emitted from the optical element 1. Subsequently, each transmission light which is emitted from many optical fibers 3 placed on the outside peripheral part of the optical element 1 interferes mutually, and a bright part of an optical bar 30 is formed continuously on a production of all peripheral directions of the optical element. The bright part of this optical bar 30 goes to that which has uniformly the luminance exceeding a prescribed value and the width exceeding a prescribed dimension.

Inventors

• 👤 Yoshio Watanabe
• 👤 義夫 渡辺

Bibliographic Details