Mitsubishi Rayon Company, Limited

Kiyoshi Ichimura

Yukio Shibuya

Satoshi Takahashi

Yoshikazu Fujinaga

Shuichiro Tokuda

Noriyuki Furukawa

Masaki Fuse

Takashi Fujigaki

Shigeru Iuchi

Shingo Suzuki

Hiroshi Okada

Kazuhiko Hotta

Masatoshi Toda

Koichiro Kido

Shogo Yamamoto

Chiaki Suematsu

Masayoshi Komiya

Norio Kawashima

Kideaki Ito

Kozo Yasuhara

An optical system having a light source, a uniforming device and an optical fiber type lightguide, wherein the uniforming device comprises a first optical transmission portion connected to the lightguide and a second optical transmission portion connected to the first optical transmission portion including a plurality of optical fibers stretching across the inside thereof which are arranged in such a manner that a light-receiving end of each of the optical fibers is placed at a randomly assigned position on a light-receiving end of the second optical transmission portion and on the other hand a light-emitting end of each of the optical fibers is placed at a randomly assigned position on a light-emitting end of the second optical transmission portion, thereby uniforming the distribution of the quantity of light emitted therefrom.

Light source system with uniforming device for optical fiber type

The invention provides an end structure for at least one optical fiber ribbon wherein the same-side ends of the optical fiber ribbons are bundled together and tightly fitted in a metallic sleeve member so that coating layers of the optical fiber ribbons may be on the inner surface of the metallic sleeve member.

Optical fiber ribbon end-structure

In apparatus for following sun light, at least two pairs of diametrically facing light-receiving elements (30a, 30c and 30b, 30d) are provided along the periphery of a circular end plane of incidence (24) of an optical fiber cable (20) where sun light is condensed by way of a lens 14. The deviation of a condensed light area from the circular end plane of incidence (24) will be effectively detected by the light-receiving elements to control a drive unit (46) which drives an equatorial (18) carrying an optical system including the lens (14) and the end plane of incidence (24) of the optical fiber cable (20). In one embodiment, another light-receiving element (50i) is provided at the center of the end plane of incidence (24) to detect when light condensing area is deviated to a great extent. The output signal of this light-receiving element (50i) is used to perform speed control of the drive unit (46). In another embodiment, a circuit arrangement for detecting abnormal state of the optical system is also used.

Apparatus for following sun light

A mode scrambler capable of converting the mode distribution of light transmitted through an optical fiber into a stationary mode distribution. The mode scrambler comprises a plurality of cylinders arranged in a predetermined arrangement, and a step index optical fiber of 100 .mu.m or above in core diameter and 0.4 or above in numerical aperture wound around and across the plurality of cylinders. The step index optical fiber is wound at least in one 8-shaped wind at least across the two cylinders of the plurality of cylinders. At least the diameter of one of two cylinders across which the step index optical fiber is wound in an 8-shape is not less than ten times and not more than fifty times the core diameter of the step index optical fiber, and the diameter of the other cylinder is not less than that of the former cylinder.

Mode scrambler

The invention provides a working equipment for roughening the side of optical fiber having a hot stamper, a sheet having rough surface to be transferred, a cushion, and a cushion-mounted plate having a portion formed in stepwise or continuously curved or sloped form.

Working equipment for roughening the side of optical fiber

An automatic gain control circuit comprising an input terminal means for receiving first and second signals, an amplifier for receiving and amplifying first and second signals and outputting a first output signal when receives the first signal and outputting a second output signal when receives the second signals, input means for receiving an operation control signal and responsive to the operation control signal for separately inputting the first and second signals to the amplifier with a predetermined interval of time, control signal generating means responsive to the second output signal of the amplifier for generating a control signal, selection means connected to the input means for supplying the second output signal of the amplifier to the control signal generating means when the second signal is fed to the amplifier and sending out the first output signals to an external circuit when the first signal is fed to the amplifier and gain control means connected to the amplifier and the control signal generating means and responsive to the control signal for regulating the gain of the amplifier, wherein the control signal generating means includes gain maintaining means for maintaining the regulated gain of the amplifier.

Automatic gain control circuit

A coating composition comprising (A) 100 parts by weight of an acrylic copolymer and (B) from 0 to 40 parts by weight of a curing agent, wherein said acrylic copolymer is a copolymer of a monomer mixture composed essentially of:

Coating composition and method for forming a multi-layered coating

Growing community of inventors

Tokyo, Japan

Kiyoshi Ichimura