fiber optic illumination device

Abstract

Abstract PURPOSE:To execute a wide and uniform illumination by forming a flaw of a specific shape extending from the surface to an optical fiber core, on the optical fiber whose one end has been coupled with a light source, and applying a substance whose refractive index is higher than a refractive index of the core, onto said flaw. CONSTITUTION:On the surface of an optical fiber 2, many flaws extending from its surface to an optical fiber core are formed, and an illumination by a side face leakage light is executed. In this case, when a cross section of the flaw 3 has been cut in the extended direction of the optical fiber 2, along the center axis of the optical fiber, it is like a saw edge and the slant face is turned in the direction of a light source 1, and although an interval of its flaw 3 is constant, depth of its flaw is formed by a depth variation shown as a quadratic function or a cubic function against the extended direction of the optical fiber 2. in such a way, a wide and uniform radiation power, namely, an illumination can be executed along the extended direction of the optical fiber 2.

Inventors

• 👤 Naomichi Okamoto
• 👤 尚道 岡本
• 👤 Zen Katagiri
• 👤 片桐　禅

Bibliographic Details