Hitachi, Ltd.

Kiyohide Miyake

Hitoshi Yokono

Aizo Kaneda

Masao Yano

Hidemi Sato

Toshiki P Tanaka

Seiichi Onoda

Ichiro Ikushima

Masaaki Kusano

Yasumasa Koakutsu

Tamio Takeuchi

Kiichi Suzuki

Atsuyoshi Ohashi

Toshiro Kodama

Syouji Yamada

In a device for coupling optically a light source with an optical transmission path, the present invention interposes an optical transmission path structure at the center of the distance between them in order to improve the optical coupling efficiency. The optical transmission path structure consists of a plurality of light transmitting elements arranged so that the light from the light source is received by the structure as incident light and is sent out therefrom as outgoing light at an outgoing angle which is equal to the angle of incidence. The light transmitting elements are arranged in parallel with the optical path of the light emitted from the light source and according to this arrangement, the system of the present device becomes equivalent to a system in which the positions of the light source are located at points of .+-.l.sub.1 from the light outgoing surface of the optical transmission path structure. When used with an optical fiber, the optical transmission path structure is disposed such that the distance from the light source to one end face of the optical transmission path structure is the same as the distance from the end face of the means for transmitting to the other end face of the optical transmission path structure.

Optical transmission device

An optical fiber connector comprising a pair of plugs, a sleeve and a pair of cap nuts which is assembled at the site where optical fibers are installed, so as to connect the optical fibers with a high degree of positional accuracy. The plugs and the sleeve are molded of a composition including a synthetic resin added with a suitable content of a filler, such as glass beads.

Optical fiber connector

Growing community of inventors

Kodaira, Japan

Kiyohide Miyake