JPS5546703A - Photo multiple distributor - Google Patents

Abstract

PURPOSE: To obtain the device of low losses by coupling a mixing rod being a prism and optical fibers by way of an optical system and Fourie-transforming the exit light from the optical fibers by the optical system then mixing the same.

CONSTITUTION: The end faces 1a, 1b and side faces 1c, 1d, 1e, 1f of a mixing rod 1 being an optical transparent quadrangular prism are all smooth surfaces. An optical lens 2 of a focal length f is placed on the optical axis 0-0 in the position between the optical fibers 11 thru 14 serving both as incident and exit fibers and the end face 1a where it focuses exactly. A reflecting surface 4 is provided at the end part of the mixing rod 1. The luminous flux L₀ emitted from the optical fiber 11 is converted to the luminous flux nearly parallel and enters the mixing rod 1. Since the real image of the optical fiber 11 is formed on the end faces of the optical fibers 11 thru 14 by the reflecting surface 4, the losses owing to the presence of the clad layer which have occured in conventional devices becomes 0 in priciple, thus the photo multiple distribution of low losses is accomplished.

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