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公开(公告)号：JPH09203660A
公开(公告)日：1997-08-05
申请号：JP1140396
申请日：1996-01-26
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO , SASAKI FUMIO , KOBAYASHI SHUNSUKE
IPC: G01J1/02
Abstract: PROBLEM TO BE SOLVED: To attain accurate detection of the optical path, expanse and the like of laser beam sources with a wide ranging wavelength by forming a photodetecting surface provided on a substrate with a KLN microcrystal body having a second harmonic-generating function of non-linear optical effect to allow adaptation to the laser beam sources. SOLUTION: Alumina powder mixed with an adhesive is applied on the surface of a substrate 1 such as aluminum plate or quartz glass plate to form and dry a reflection preventing film 3. Then, microcrystal powder of potassium lithium niobate (K3 Li2 Nb5 O15 , so-called KLM) or 5 nitro 2 aminotoluene [CH3 C6 H3 (NO2 )NH2 , so-called NMK] is mixed with an adhesive to and applied at one end part of a preventing film 3 to form a photodetecting surface 3. This attains not only recognition of a laser beam wavelength from luminescent color but also adaptation to light with a wide wavelength range with one detector. This also allows the accurate determination of the shape and the position of a laser beam thereby improving resistance to damage by laser.
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公开(公告)号：JPH0753297A
公开(公告)日：1995-02-28
申请号：JP22279393
申请日：1993-08-16
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO
Abstract: PURPOSE:To grow a homogeneous crystal by introducing a melt obtd. by melting a mixture composed of a raw material having a compsn. equal to the component compsn. of a desired crystal and a flux into a small-bore pipe part and pulling up or pulling down the crystal with a seed crystal. CONSTITUTION:The raw material having the compsn. equal to the component compsn. of the desired crystal and the flux of the prescribed amt. of this raw material are mixed to obtain a mixture. This mixture is charged into a crucible 1 of a resistance heating type and is melted to obtain the raw material melt 2. This melt 2 is introduced to the small-bore pipe part 5 of the crucible 1 and is brought into contact with the seed crystal 3, and thereafter, the seed crystal 3 is pulled up or pulled down to grow the single crystal 4.
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公开(公告)号：JPH06345588A
公开(公告)日：1994-12-20
申请号：JP15303593
申请日：1993-05-31
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO
Abstract: PURPOSE:To obtain a practical-quality crystal with the composition hardly fluctuated and add an impurity in a higher amt. than specified by a distribution coefficient in the single crystal growth using a molten material of incongruent composition by supplying the molten material while using a minute clearance or a micronozzle to minimize the molten material to be supplied to a crystallization region. CONSTITUTION:A discharge hole having 100-800mum diameter is provided at the bottom of a platinum crucible 4 to discharge a part of a molten material, a platinum wire 7 of 500-800mum is hung on the hole and inserted into the hole so that the projecting part is controlled to 800-2000mum. The melting of the material and the molten material temp. are controlled by the current value applied to the crucible 4. A material 5 is filled in the crucible and electrically heated. As the material is melted, the molten material is oozed out from the clearance of the insert and dropped along the platinum wire surface, and the dropped material is pulled down with a seed crystal 8.
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公开(公告)号：JPS6347706A
公开(公告)日：1988-02-29
申请号：JP19129986
申请日：1986-08-15
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO
Abstract: PURPOSE:To permit direct prepn. of an objective single crystal fiber from the melt of a crystal base material by providing a microprojection to a part at the top end face of a pipe having a capillary, transferring the melt to the top end part of the pipe by capilarity and pulling up part of the melt in the microprojection. CONSTITUTION:The platinum pipe 5 is erected at approximately the center of a main heater 3. The microprojection 7 is formed on the cut face at the time of cutting out the pipe. Both sides of the pipes are held open and the pipe with the projection 7 faced upward is erected in substantial proximity to the groove of a twisted wire in such a manner that the bottom end of the pipe is dipped in the melt 12 when said melt wets the main heater 3 at the time of mounting the pipe. A raw material LiNbO3 is attached to the front end of a vertical driving mechanism 10 and is brought into contact with the main heater 3 by which the material is melted and the surface thereof is wetted. A seed crystal 11 which is LiNbO3 having a desired crystal orientation is then mounted in place of the raw material and the top end is brought into contact with the top end of the pipe so that said crystal is partly melted back to set the projection 7 and to fuse the melt thereof with the raw material melt 12 sucked by the capillarity. The temp. conditions are thereafter set at a desired fiber diameter and while the melt is puled up in the projection 7, the melt is crystallized.
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公开(公告)号：JPH06265949A
公开(公告)日：1994-09-22
申请号：JP7891293
申请日：1993-03-12
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO
Abstract: PURPOSE:To obtain a new boric acid-base nonlinear optical material compsn. and its production method. CONSTITUTION:The compsn. is synthesized by calcining zinc oxide or zinc carbonate, and boric acid or boric acid anhydride as the start source material at
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Patent Agency Ranking
公开(公告)号：JPH04280891A
公开(公告)日：1992-10-06
申请号：JP6885391
申请日：1991-03-08
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO
Abstract: PURPOSE:To realize the optimum crystal growing condition of a single crystal fiber over a wide crucible temperature range in a pull-out process by adjusting the protruded length of an insertion member protruded from a molten liquid pull-out port. CONSTITUTION:A fiber 7 is grown by pulling out a molten raw material 4 from a crucible 1 through a pull-out port 2 opened at a part of the crucible 1 by using a pull-out driving shaft 8 holding a seed crystal 5 at the tip end. In the above process, an insertion member 3 is protruded from the pull-out port 2, the molten liquid 4 is extruded through the gap between the insertion member 3 and the pull-out port 2 and guided along the surface of the insertion member 3 to the seed crystal, and the extruded liquid is crystallized at the seed crystal 5 and pulled out with the driving shaft 8. The protrusion length of the insertion member 3 is made to be long when the crucible temperature is high and to be short when the temperature is low. A solid-liquid interface 6 satisfying the crystallization condition can be formed at the tip end of the insertion member by this process.
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公开(公告)号：JPS62182188A
公开(公告)日：1987-08-10
申请号：JP2476386
申请日：1986-02-06
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO
Abstract: PURPOSE:To enable direct and ready growth of a single crystal fiber from molten liquid, by contacting a crystal matrix to a heater having a minute protrusion at a part of the surface and pulling up the molten liquid formed near the protrusion to effect the crystallization of the material. CONSTITUTION:A platinum wire 2 is wound to a coil of 5-10 turns to form a heater 1. A thin platinum wire 3 is welded to a part of the upper end of the coil in a manner slightly protruded from the top upward to form a minute protrusion 4. The heater 1 is heated by electric current and a crystal matrix 5 attached to a lower driving shaft 10 is made to contact with the heater 1 from beneath until the heater 1 and the protrusion 4 is wet with the molten liquid 6 filled in the heater 1. A seed crystal 7 freely attached to a driving shaft 9 of a pulling-up device through a chain 11 is lowered until the tip of the crystal is brought into contact with the molten liquid wetting the protrusion 4 to effect partial melting of the seed crystal. The crystal is pulled up at a prescribed growth rate while controlling the temperature to the condition for the growth of a fiber crystal 8. In order to continuously supply the crystal material 5 to the heater 1, the lower part of the heater coil 1 is wound at higher winding density to raise the temperature at the lower part.
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公开(公告)号：JPH0886922A
公开(公告)日：1996-04-02
申请号：JP22147194
申请日：1994-09-16
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO
IPC: G02B6/00
Abstract: PURPOSE: To provide a production method for an optical fiber to produce an optical waveguide structure in a single crystal fiber. CONSTITUTION: In the crystal growing process from a fused liquid 6 of the source material, the mechanism of crystal growing differs between in the center part 11 and the peripheral part 12 of the solid-liquid interface 7, which induces inhomogeneity of refractive index. This mechanism is used to produce an optical waveguide structure. By this method, an optical waveguide structure can be formed in a single crystal fiber while the crystal is grown.
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公开(公告)号：JPS63215598A
公开(公告)日：1988-09-08
申请号：JP4567487
申请日：1987-02-27
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ONISHI NORIO
Abstract: PURPOSE:To readily obtain a barium borate single crystal consisting of pure low temperature phase structure, by blending BaCl2 and NaBO2 with NaCl which is a flux at a specific molar ratio and heating and melting the blend to carry out reaction and depositing the resultant BaB2O4 as a crystal in the flux. CONSTITUTION:1-13.5mol. sodium chloride as a flux is blended with a raw material consisting of 1mol. barium chloride and 2mol. sodium metaborate. Then the blend is heated and melted to carry out reaction and barium borate which is reaction product is deposited as a crystal in the flux. Thus a single crystal of beta-BaB2O4, consisting of prism- or needle-like transparent crystal, containing no high temperature phase and wholly consisting of pure low temperature phase structure is obtained. The single crystal has large nonlinear optical effect and is strong to injure by laser and useful as nonlinear optical material.
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公开(公告)号：JPH0499609A
公开(公告)日：1992-03-31
申请号：JP7948190
申请日：1990-03-28
Applicant: AGENCY IND SCIENCE TECHN
Inventor： HIRAGA TAKASHI , MORIYA TETSUO , ONISHI NORIO , YAMASHITA MIKIO , TORITSUKA KENJI
Abstract: PURPOSE:To allow the titled film to be a good quality medium for propagating pulse lights having a width of the order of femto-seconds by uniformly dispersing a soluble compound in a solvent polymer compound on a substrate for forming a film, and thereafter subjecting the film to a hot rolling process while adding one directional shearing stresses. CONSTITUTION:A soluble compound and solvent polymer compound are added into a solvent, and the solution obtained is dropped on a glass substrate, and then the glass substrate is mounted on a high-speed rotating disk for forming a film sample. It is quietly left under room temperatures for three days for conducting preliminary drying, and then subjected to a treatment for two hours at 100 deg.C under vacuum conditions. Voids in the sample generated during the drying process are treated by a vacuum hot rolling device in the form of being held by another substrate with the same quality. The film sample 6 is charged within a vacuum vessel 1 for carrying out vacuum air discharging to it by a vacuum air discharging device 5 under room temperature for 30mins., and then it is heated by a heating device 2 at the rate of 50 deg.C/mins., and at the time when it reaches 100 deg.C, vacuum air discharging is stopped and the vacuum condition is maintained herein so as to perform further heating, and at the time when it reaches 150 deg.C, hydrostatic pressure of 50kg/cm is applied thereto by means of a hydraulic press main body, and after it is held for 10mins. cooling is effected at the rate of 100 deg.C/hr.
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