OPTICAL DISTRIBUTOR

PURPOSE:To make an otical distributor small-sized and inexpensive, and also to interrupt the reverse incidence of reflected rays, by equally distributing input optical beam to plural distributig optical fibers provided in the circumference of an optical axis through use of a concave mirror having a through-hole in the center. CONSTITUTION:Distributing optical fibers 22-27 are placed in the outside circumference centering around an input optical fiber 21, and on a projecting optical axis A, a concave mirror 30 on which a total reflection film 31 having a microscopic through-hole 32 in the center is additionally provided is placed. According to this constitution, input optical beam is reflected by the total reflection film 31 of the concave mirror 30 and its curved surface, and is made incident and distributed to the distributing optical fibers 22-27 equally and also at its maximum. In this case, projecting optical beam traveling straight are emitted to the outside through the through-hole 32, therefore, no reflected rays are made incident in reverse to the projection surface of the optical fiber 21. In this way, the optical distributor is made small-sized and inexpensive, and also the reverse incidence of reflected rays is interrupted.