| 摘要 |
PURPOSE:To reduce a leak of light and obtain a small-sized device by arranging plural optical fibers and a light reflector near the focal plane of a specific converging lens on both sides of the lens, and interposing a polarizing and separating filter between the lens and light reflector. CONSTITUTION:A spacer 17 is inserted so that fiber end surfaces are on one focal plane of the converging lens 16 whose pitch is less than 0.25, and a prism 19 and the polarizing filter 20 are provided between the lens 16 and reflecting mirrors 18a and 18b arranged near the other focal plane of the lens 16. Light incident from a fiber 15a is separated by the polarizing filter 20 into a P and an S wave, and the P wave is transmitted through the filter 20 and reflected by the reflecting mirror 18a to enter an optical fiber 15c. The S wave is passed through the filter 20 and reflected by the reflecting mirror 18a to enter an optical fiber 15b. There is not any discontinuous point which may cause diffusion on the optical path, so a leak of light is reduced. |
