The Furukawa Electric Co., Ltd.

Mitsubishi Electric Corporation

Tetsuro Wada

Masahide Kuwabara

Yukio Komura

Hiroyuki Abe

Koji Masuda

Hidetoshi Mishima

Kenji Taira

Hideaki Maehara

Toshihiro Mikami

Kazuyou Mizuno

Eiji Ueda

Kazuhiko Matsuda

Mengxiong Wang

Momoyo Hino

Kazuhiro Miyazawa

Masaki Izumo

Masaki Hattori

Atsushi Hiraizumi

Koichi Shintomi

An object of the present invention is to provide a water level measurement device and a shoreline extraction method each of which is capable of stably measuring the water level. A pixel selection unit () selects a pixel of interest () from a designated area () designated from a captured image (), and an identification image extraction unit () extracts identification images (), () each coming in contact with the pixel of interest (). The identification unit () calculates an identification strength indicating a degree to which an area corresponding to each of the identification images (), () is a water area, on a basis of the result of machine learning related to identification between the water area and a non-water area. The shoreline extraction unit () extracts a shoreline in the captured image from the identification strength of the area corresponding to each of the identification images (), (), on a basis of the result of machine learning related to the identification between the water area and the non-water area by the learning unit ().

Water level measurement device and shoreline extraction method

An optical power supply type sensing system includes: an optical directivity coupler () mounted in a sensor unit (); a photo-electric converter () connected to a first optical fiber () among the first to the third optical fiber () connected to the optical directivity coupler (); an optical output device () connected to the second optical fiber (); and a measurement device () connected to the third optical fiber () drawn out of the sensor unit ().

Optical power supply type sensing system

A thin film deposition method for producing an optical film with an optical characteristic on a deposition substrate in a vacuum chamber is provided. The method may include preparing in the vacuum chamber a deposition source which is a source of the film producing material; holding the deposition substrate with a substrate holding member; arranging the deposition substrate and the deposition source such that, given that a vertical distance from the center of the deposition substrate to the deposition source is defined as ZK and a horizontal distance between the deposition substrate and the deposition source as Xk, Xk/Zk is set to satisfy a following equation 0.48&#x2266;Xk/Zk&#x2266;0.78; rotating the deposition substrate on a rotational axis which is orthogonal to the deposition substrate; and evaporating the film producing material of the deposition source to perform deposition on the deposition substrate.

Thin film deposition method and thin film deposition apparatus

An electric furnace extending method and apparatus for an optical fiber glass body alignment when connecting the extension use body and pulling member and making it possible to immediately start the extension after the fusing of the connection portion. A centering mechanism for centering the free end portion of the body and member on the furnace center side is provided between the furnace pipe of the electric furnace and grips of the extension use glass body and between the furnace pipe and the pulling member. The free end portion is centered by this centering mechanism, then the gripped sides of the body and member are fixed, the front ends of the two free end portions are abutted and fused and bonded at the highest temperature portion inside the electric furnace, then the highest temperature portion is moved to the extension portion of the glass body side and the extending of the glass body is commenced.

Electric furnace extension method and extension apparatus for optical fiber glass preform

In an optical device manufacturing method according to the present invention, a metal film is formed on a side surface of a bare fiber, a film is formed on an end face of the bare fiber, and, thereafter, the bare fiber is inserted into a ferrule until the end face of the bare fiber on which the film was formed is protruded from an end face of the ferrule, and then, the bare fiber is secured to the ferrule. In an optical device according to the present invention, a bare fiber having a side surface on which a metal film was formed is inserted into and secured to a ferrule, and an end face of the bare fiber is protruded from an end face of the ferrule, and a distance L between the end faces satisfies a relationship L<4&times;d (outer diameter of the bare fiber), and a film is formed on the end face of the bare fiber.

Method for manufacturing optical device and optical device

An electric furnace extending method and apparatus for an optical fiber glass body alignment when connecting the extension use body and pulling member and making it possible to immediately start the extension after the fusing of the connection portion. A centering mechanism for centering the frame and portion of the body and member on the furnace center side is provided between the furnace pipe of the electric furnaces and grips of the extension use glass body and between the furnace pipe and the pulling member. The free end portion is centered by this centering mechanism, then the gripped sides of the body and member are fixed, the front ends of the two free end portions are abutted and fused and bonded at the highest temperature portion inside the electric furnace, then the highest temperature portion is moved to the extension portion of the glass body side and the extending of the glass body is commenced.

An apparatus for producing an optical fiber porous glass preform using the VAD method which can stably produce a high quality optical fiber porous glass preform, wherein a target bar is only rotatably supported by a chuck and is not pulled upward, a lower tip of a soot body is detected by a laser and a photodetector, and a core burner and a cladding burner is lowered in response to the result detected. A tip position detecting drive and burners are synchronizingly lowered while the deposit of porous glass grows at the lower portion of the target bar.

Growing community of inventors

Tokyo, Japan

Tetsuro Wada