公开(公告)号：JPS55144443A

公开(公告)日：1980-11-11

申请号：JP5278979

申请日：1979-04-27

Applicant: FUJITSU LTD

Inventor： NAKAMURA OSAMU ,  KAWABATA YOSHIO ,  GOTOU JIYUNJIROU

IPC: C03B37/027 ,  C03B37/023 ,  C03B37/025 ,  G02B6/00

Abstract: PURPOSE:To provide uniform protective resin layer on the surface of optical fibers by a method wherein heating furnace temperature is controlled according to signal detecting variations in speed of optical fiber drawing so that drawing speed is maintained at a specified value. CONSTITUTION:When the temperature of optical fiber base material 3, 4 exceeds the specified value, the rotating speed of capstan 12 increases so as to maintain the diameter of fiber wire 5 at a constant value, and as a result drawing speed increases. At this time, the rotating speed of the capstan 12 is found by detector 15, causing a signal 16 to be output from comparator 16 in proportion to variations in drawing speed. Corresponding to this output signal, power supply from source 17 to electric furnace 2 is reduced. This results in reduced temperature of fiber base material 3, 4. So, the rotating speed of the capstan 12 is reduced so that the diameter of fiber wire 5 is maintained at the specified value, thereby restoring the specified draw speed. When the temperature of the base material 3, 4 is lowered and drawing speed is decreased, the reverse operation occurs to resume the specified drawing speed.

公开(公告)号：JPS55126542A

公开(公告)日：1980-09-30

申请号：JP3478679

申请日：1979-03-23

Applicant: FUJITSU LTD

Inventor： NAKAMURA OSAMU ,  KAWABATA YOSHIO ,  OZEKI TOMOMASA

IPC: C03B37/023 ,  C03B5/42 ,  C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  G02B6/00

Abstract: PURPOSE:To prevent penetration of impurities from a natural quartz crucible, in manufacture of glass for an optical transmission line, by forming a synthetic quartz film on the inner wall of the crucible by a vapor phase deposition method. CONSTITUTION:Guide tube 12 is attached to one end of natural quartz tube 10, and SiCl4 of five to six-nine class used in the semiconductor industry, O2, steam, etc. are introduced from the other end of tube 12. The outer wall of tube 10 is uniformly heated with moving oxyhydrogen burner 13 or other heat source to form synthetic quartz film 11 contg. little impurities on the inner wall of tube 10. One end of tube 10 is then sealed by melting to manufacture a quartz crucible. By forming glass for an optical transmission line with this crucible the amt. of impurities such as Fe mixed becomes negligibly small, so light attenuation of an optical transmission line made of this glass is minimized.

公开(公告)号：JPS54134132A

公开(公告)日：1979-10-18

申请号：JP4147578

申请日：1978-04-07

Applicant: FUJITSU LTD

Inventor： NAKAMURA OSAMU ,  TATSUTA TAKASHI

IPC: C03B37/023 ,  G02B6/00

Abstract: PURPOSE:The title device designed to manufacture high-quality optical fibers of uniform dimension, wherein the glass is remolten in a U-shaped conduit between the melting and the spinning crucibles for a given time to prevent the devitrification of glass and to maintain the pressure applied to the nozzle constant. CONSTITUTION:The preform rods 1 and 2 are molten in the melting crucibles 3 and 4 by the heating furnace 7, kept by the U-shaped conduits 5 and 6 at a high temperature for a given time, and spun through the crucible 8 into fibers. The furnace 7 is kept at a higher temperature then that of the heating furnace 9 to prevent devitrification during the spinning. The contamination of impurities can be prevented by the almost airtight structure between the crucibles 3 and 4 and the double crucible 8. The heating time is controlled by the inside diameters of the conduits 5 and 6 and the crucibles 3 and 4, and the head H. The molten glass surface is controlled to maintain the pressure applied to the nozzle almost constant.

公开(公告)号：JPS5474298A

公开(公告)日：1979-06-14

申请号：JP14137077

申请日：1977-11-24

Applicant: FUJITSU LTD

Inventor： GOTOU JIYUNJIROU ,  OZEKI TOMOMASA ,  NAKAMURA OSAMU

IPC: C01G15/00

Abstract: PURPOSE:Water-containing GaCl2 is vaporized at low temperature in unliquefied condition, and the vapor is condensed in series-connected cooling containers to remove substantially all of water and Cu content to provide high purity GaCl2 without the danger of bumping. CONSTITUTION:Crude GaCl2 is disposed in a gas-tight container 1 in a oil bath 2 which is maintained at a temperature of about 80 deg.C. The pressure of container is reduced to about 1 mmHg causing CaCl2 to sublime. The first sublimate containing water and other impurities is passed througha first container 6 and conducted into a second container 3 cooled by liquid N25 where it is cooled and condensed. Meanwhile, The first container 6 is maintained at ambient temperature or a sufficient higher temperature than that of liquid N2 so as to permit passing of the first sublimate. Then liquid N2 is poured into a cooling bath 7 of the container 6 to cool and collect the next sublimate, or pure GaCl2 which is separated from the first sublimate. The process provides purified GaCl2 useful as raw material for Ga203 in optical fiber glass component.

公开(公告)号：JPS5468645A

公开(公告)日：1979-06-01

申请号：JP13610377

申请日：1977-11-11

Applicant: FUJITSU LTD

Inventor： NAKAMURA OSAMU ,  GOTOU JIYUNJIROU

IPC: C03B37/023 ,  G02B6/00

Abstract: PURPOSE:To form a fiber of a constant ratio of its core layer and covering layer by supplying glass raw materials respectively in the form of glass rods into double crucibles for continuous spinning of the optical fiber and controlling their diameters thereby making the feed ratios of both constant. CONSTITUTION:Soot for core and soot for covering having respectively once melted in cruicibles 6, 16 are drawn out through effluent ports 7, 17 to let a glass rod 8 for core layer and a glass rod 18 for covering be formed. Following to this, the glass rod 8 is continuously fed into the inner crucible 12 of the double crucibles and the glass rod 18 into the outer crucible 21 respectively, where they are remelted and are then drawn out through effluent ports 23, 24, whereby the optical fiber composed of the double structure of the core layer and covering layer is produced. The take-up of the abovementioned glass rods 8, 18 is kept at respectively specified values by the glass rod diameter control rollers 10, 20 which are controlled by the signals from glass diameter detectors 9, 19 to make the feed ratios to the double crucibles constant, whereby the ratio between the covering layer diameter and covering layer thickness of the fiber formed is made constant. The fiber diameter is defined by using similar detector 27 and control roller 28.

公开(公告)号：JPS5260146A

公开(公告)日：1977-05-18

申请号：JP13665675

申请日：1975-11-12

Applicant: FUJITSU LTD

Inventor： NAKAMURA OSAMU ,  TANAKA MINORU ,  TACHIYAMA TAKASHI

IPC: C03B37/018 ,  C03B37/027 ,  C03B37/029 ,  F23D14/52 ,  G02B6/00

Abstract: PURPOSE:The inflammable gas nozzle is equipped outside auxiliary inflammable gas supply nozzle for use of spinning of light fiber, etc. Furthemore, composite nozzle is installed outside the flammable gas nozzle. In this way, the outer diameter of the product is made uniform.

公开(公告)号：JPS5242744A

公开(公告)日：1977-04-02

申请号：JP11840875

申请日：1975-09-30

Applicant: FUJITSU LTD

Inventor： ARIMA TADAO ,  NAKAMURA OSAMU ,  TAKAHATA TAKEO

IPC: G01M11/02 ,  G01M11/00 ,  G02B6/00

Abstract: PURPOSE:To eliminate the influence of a coating layer by selecting light emerging from an optical fiber with angles sufficiently less than the critical angnel and limiting an effective area of the light-receiving surface of a photo electric converter.

公开(公告)号：JP2012079070A

公开(公告)日：2012-04-19

申请号：JP2010223226

申请日：2010-09-30

Applicant: Fujitsu Ltd ,  富士通株式会社

Inventor： NAKAMURA OSAMU ,  OKAJIMA KOICHI

IPC: G06F1/16

CPC classification number: H05K7/1489 ,  B23Q3/18 ,  B23Q3/186 ,  B25B11/02 ,  G06F1/181 ,  Y10T29/49826

Abstract: PROBLEM TO BE SOLVED: To provide an installation jig and an installation method using the same, when installing an apparatus on a rack, that enable the apparatus to be pushed into a predetermined position in the rack by smaller force without giving impulsive force.SOLUTION: An installation jig has a pair of slide members extending to a fore side, stoppers for preventing the slide members from moving toward the fore side, and knobs for pulling the slide members to a near side. Each of the slide members has an inclined surface comprising a planar part and a bottom surface comprising a planar part on an opposite side of the inclined surface. A height from the bottom surface to the inclined surface is gradually decreased from the near side to the fore side. The inclined surface and the bottom surface are made of a low friction coefficient material. The respective bottom surfaces are fixed at predetermined positions in horizontal surface parts having equal heights in a pair of brackets provided in a rack. When sliding down the apparatus from the near side to the fore side at the inclined surface, an edge of the apparatus on the fore side comes into contact with the horizontal surface parts.

Abstract translation: 要解决的问题：为了提供一种安装夹具及其安装方法，当在机架上安装装置时，能够通过较小的力将装置推入机架中的预定位置而不产生冲击力 。 解决方案：安装夹具具有一对延伸到前侧的滑动构件，用于防止滑动构件向前侧移动的止动件和用于将滑动构件拉到近侧的旋钮。 每个滑动构件具有包括平面部分和底面的倾斜表面，该底面包括在倾斜表面的相对侧上的平面部分。 从底面到倾斜面的高度从近侧向前侧逐渐减小。 倾斜表面和底表面由低摩擦系数材料制成。 相应的底面固定在设置在机架中的一对托架中具有相同高度的水平表面部分中的预定位置处。 当在倾斜表面上从近侧向前侧滑动装置时，前侧的装置的边缘与水平表面部分接触。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2002251609A

公开(公告)日：2002-09-06

申请号：JP2001049900

申请日：2001-02-26

Applicant: FUJITSU LTD

Inventor： NAKAMURA OSAMU ,  SHITAMAE HIROKI ,  KAMATA MASAKI

IPC: G01J1/44 ,  G01J5/48 ,  G06T1/00 ,  H04N5/33 ,  H04N7/18

Abstract: PROBLEM TO BE SOLVED: To provide an infrared imaging device capable of appropriate shading correction for precise reproduction of a scene image. SOLUTION: This infrared imaging device performing shading correction of image data photographed by means of a camera bead having an optical system, a plurality of infrared detection elements, and a housing storing them is provided with a first correction part correcting an optical system shading component so that a scene component included in the image data in photographing an even scene is kept constant for forming sensitivity correction image data, a storage part storing a housing response profile for correcting a housing shading component based on an infrared ray radiated from the optical system and the housing in every infrared detection element, and a second correction part correcting the housing shading component on the basis of the sensitivity correction image data about the respective infrared detection elements and the housing response profile for forming housing shading correction image data.

公开(公告)号：JPH1175104A

公开(公告)日：1999-03-16

申请号：JP23574597

申请日：1997-09-01

Applicant: FUJITSU LTD

Inventor： NAKAMURA OSAMU ,  SHITAMAE HIROKI ,  KAMATA MASAKI ,  SUZUKI KATSUHIDE

IPC: G01J1/42 ,  G01J1/44 ,  G01S3/782 ,  H04N5/232 ,  H04N5/33

Abstract: PROBLEM TO BE SOLVED: To prevent a target image from being attenuated even if a real time sensitivity correction arithmetic is performed when correcting sensitivity dispersion in infrared ray sensors for an infrared ray tracking device provided with the infrared ray sensor consisting of plural infrared ray sensing elements arranged in 2-dimension. SOLUTION: A target position dither means 5 generates a visual axis dither signal to continuously change a visual axis of an infrared ray sensor 1 and adds it to a target position signal detected from a target position detection means 4. A tracking arithmetic means 6 receiving the target position signal on which the visual axis dither signal is superimpose discriminates it that a target position on a scene has been changed and generates a tracking signal to track a target in a virtual direction. Thus, a gimbal means 7 generates a gimbal drive signal so that the infrared ray sensor 1 directs the virtual target direction to drive the gimbal mechanism section 2.