WO2001029600A1 - Procede permettant d'empecher la fonte d'une fibre optique en plastique, et dispositif de transmission optique - Google Patents

Procede permettant d'empecher la fonte d'une fibre optique en plastique, et dispositif de transmission optique Download PDF

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Publication number
WO2001029600A1
WO2001029600A1 PCT/JP2000/007180 JP0007180W WO0129600A1 WO 2001029600 A1 WO2001029600 A1 WO 2001029600A1 JP 0007180 W JP0007180 W JP 0007180W WO 0129600 A1 WO0129600 A1 WO 0129600A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
light source
optical
fiber
face
Prior art date
Application number
PCT/JP2000/007180
Other languages
English (en)
Japanese (ja)
Inventor
Fumio Ogura
Original Assignee
Waden Kougyo Kabushikikaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP29667999A external-priority patent/JP2003294976A/ja
Priority claimed from JP2000273094A external-priority patent/JP2005099062A/ja
Application filed by Waden Kougyo Kabushikikaisha filed Critical Waden Kougyo Kabushikikaisha
Priority to AU76878/00A priority Critical patent/AU7687800A/en
Publication of WO2001029600A1 publication Critical patent/WO2001029600A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources

Definitions

  • the present invention relates to a method for preventing burning of a resin-based optical fiber, which can expand the applicable range of an inexpensive resin-based optical fiber, and an optical transmission device.
  • optical fiber lighting system that transmits light obtained from a single light source through one or more optical fibers and illuminates a place away from the light source has been widely used in a wide range of fields. According to this system, for example,
  • an optical fiber illumination system it is possible to reduce ultraviolet rays and infrared rays in the illumination light, thereby preventing deterioration of an object to be irradiated.
  • an optical fiber transmits almost only visible light, it emits almost no heat even when irradiated with light coming out of the end of the optical fiber (such light is also called cold light). Therefore, precious works of art and paintings can be prevented from being damaged by light or heat, and power consumption can be reduced by reducing the calorific value of the air conditioning system.
  • the light source and the light emitting unit are separated from each other, it is suitable for lighting around water and has the advantage that maintenance such as lamp replacement is easy. Specifically, it is expected to be used in museums, galleries, museums, multi-purpose public spaces, shops, ordinary homes, displays, and others.
  • silica-based optical fiber if an expensive silica-based optical fiber is used as the optical fiber, the whole system becomes very expensive.
  • silica optical fiber is a converging fiber, when the lens is focused, the shadow of each fiber appears. For this reason, it is desirable to use polymer optical fiber (PMMA), which is inexpensive to produce and easy to process.
  • PMMA polymer optical fiber
  • polymer-based light Fibers have difficulty in heat resistance (heat-resistant temperature of about 70 ° C). When high light heat enters the light input end face of the optical fiber from the light source, the incident light in the fiber There was a problem that burning occurred over time near the end face c
  • JP-B Japanese Patent Application Publication (JP-B) No. 582-2 describes a relay circuit housed in a pressure-resistant container of an optical submarine repeater and an optical circuit housed in a high-voltage pipe of an optical submarine cable.
  • the optical fiber is arranged so as to be aligned with the optical axis of the condenser lens, and the end face of the condenser lens and the optical fiber.
  • the material is filled with a liquid or jelly-like substance having a refractive index substantially equal to the refractive index of the optical fiber. The reason for filling with this liquid or gel-like substance is to prevent seawater from entering between the condenser lens and the end face of the optical fiber, and not to release heat.
  • JP-A Japanese Patent Application Publication
  • JP-A No. 61-20464 discloses that, when performing optical coupling of a plurality of optical elements, two holes are formed in a side wall of a package. It describes that after assembling in air, the air in the package is replaced with gas for protecting the end face, and the two holes are closed and sealed. The reason for filling with gas in this way is to prevent oxidation of semiconductor lasers, optical receivers, lenses, and optical fibers and adhesion of dirt, but not to heat dissipation.
  • JP-A Japanese Patent Application Publication
  • JP-A No. 61-235,066 discloses an apparatus for conveying high-energy electromagnetic radiation from a laser source to an optical fiber, in which an input end and an exit end are connected. It has a sleeve for containing a liquid through which the radiation can pass, and the refractive index of the liquid is approximately adapted to the refractive index of the lens and the optical fiber.
  • the liquid flows through the apparatus to remove contaminants that may be generated by scattered radiation hitting the sleeve wall.
  • the present invention provides a method of using a polymer-based optical fiber as an optical fiber even when high-heat light is incident on the light-entering end face of the optical fiber from a light source. It is an object of the present invention to provide a method and an optical transmission device capable of preventing a fiber end face from being burned.
  • a method for preventing burning of a resin-based optical fiber according to the present invention is to prevent the end face of a resin-based optical fiber from being burned by light incident from an optical system including a light source.
  • a space between the fiber side end of the optical system and the fiber end face is filled with a translucent liquid, the fiber end face is cooled with the translucent liquid, and the fiber end face is shielded from air.
  • the optical transmission device according to the present invention provides an optical system including a light source, a resin optical fiber in which light from the optical system is incident on an end face, and a transmission between a fiber side end of the optical system and a fiber end face.
  • a container for filling the optical liquid and cooling the fiber end face with the translucent liquid and shielding the fiber end face from the air is provided.
  • ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where high light heat is made to enter the light-entering end face of an optical fiber from a light source using a volima-type optical fiber as an optical fiber, the fiber side end part of an optical system and a fiber
  • the fiber side end part of an optical system By filling the end face with a translucent liquid, cooling the fiber end face with this translucent liquid, and shielding the fiber end face from air, it is possible to prevent the end face of the optical fiber from burning out. .
  • the outside of the container filled with the translucent liquid may be air-cooled.
  • the light-transmissive liquid may be circulated to the outside and cooled.
  • the optical transmission device may further include, in the light source, a plurality of lamps, a mechanism for selecting lighting of the plurality of lamps, a detecting means for detecting a broken ball of the lamp, And an instruction means for instructing to select the lamp that has not burned out in the event of a failure.
  • the spare lamp can be quickly switched to a spare lamp.
  • a temperature sensor is attached to the container that fills the translucent liquid, and when a temperature rise of the container or the liquid is detected and a temperature rise of a predetermined value or more occurs.
  • the light source is turned off.
  • FIG. 1 is a cross-sectional view illustrating a configuration of an optical transmission device according to a first embodiment of the present invention.
  • FIG. 2 is a diagram showing the shape of another lens that can be used as the second lens 4 in the optical transmission device according to the first embodiment of the present invention.
  • FIG. 3 shows an optical transmission device according to a second embodiment of the present invention
  • FIG. 2 is a view schematically showing a coolant circulation system for circulating the fluid to the outside to cool the fluid.
  • FIG. 4 is a diagram showing a temperature measurement result in the optical transmission device according to the first embodiment of the present invention.
  • FIG. 5 is a perspective view showing a configuration of an optical transmission device according to a third embodiment of the present invention.
  • FIG. 6 is a flowchart showing a control flow of the optical transmission device according to the fourth embodiment of the present invention.
  • FIG. 1 is a cross-sectional view illustrating a configuration of an optical transmission device according to a first embodiment of the present invention.
  • This optical transmission device has a housing frame containing the light source 1 inside.
  • the housing frame 15 is a hollow box body and has a vent hole (not shown). Inside the housing frame 15, from left to right in the figure, a fan 14 for cooling the light source, a light source (lamp) 1, a first lens 2, a cold mirror reflector 3, and a second lens 4 are located.
  • the light source cooling fan 14 draws in external air into the housing frame 15 and exhausts it out of the frame, thereby cooling the light source 1 with the wind.
  • the light source 1 is a robot halogen bulb, and the device of this example (fiber diameter 3 mm X
  • the output is 65 W for (19 lines).
  • the first lens 2 and the second lens 4 condense the light emitted from the light source 1 toward the optical fiber rod 6.
  • the reflection cup 3 reflects light emitted from the first lens 2 toward the outer periphery toward the second lens 4.
  • the optical fiber unit fixed coupling 13 and the optical fiber unit coupling 12 are attached to the right surface of the housing frame 15 in the figure.
  • the fixed coupling 13 is a hollow cylinder and has a housing It is fixed to the side wall 15 a of the flange frame 15.
  • the fixed coupling 13 is disposed coaxially with the light source 1 and the optical axes of the first and second lenses 2 and 4.
  • a hollow cylindrical optical fiber unit coupling 12 is also fitted to the fixed coupling 13 ⁇ .
  • the coupling 12 contains a rod including a plurality of (19 in this example) POF optical fibers.
  • the coupling 12 is slidable in the fixed coupling 13 in the axial direction (the left-right direction in FIG. 1). The axial position of the coupling 12 can be fixed by tightening the fixing screw 13a.
  • the second lens 4 is housed in the inner hole at the left end of the coupling 12 while being pressed by the lens fixing adjuster screw 10. Behind the second lens 4 of the coupling 12, a coolant booth 5 and a coolant seal packing 8 are provided. The booth 5 and the packing 8 will be described later in detail.
  • the optical fiber rod 6 is formed by assembling 19 optical fibers 6a having a diameter of 3 mm and fitting a sheath 6b on the outside thereof.
  • the sheath 6 b is fitted inside the optical fiber unit cutting 12.
  • An optical fiber rod adjuster screw 11 is disposed at the right end of the coupling 12 and the sheath 6b.
  • the screw 11 has an internal screw 11 a that is screwed into a male screw 12 a on the outer periphery of the right end of the coupling 12.
  • the inner diameter portion l ib of the screw 11 1 has a double ring shape extending to the left side in the figure, and pushes the sheath 6 b of the optical fiber rod 6 to the left side in the figure.
  • Light generated from the light source 1 provided in the housing room 15 passes through the first lens 2 and the second lens 4 and enters the port 6 including a plurality of resin-based optical fibers.
  • the light source 1 for example, a 65 W white halogen bulb with high photothermal heat is used to obtain strong irradiation from the end of the optical fiber.
  • a number of resin-based optical fibers 6a are adhered to each other with an adhesive, and are fixed in the optical fiber coupling 12 by an optical fiber rod adjuster screw 11.
  • a typical example of the resin optical fiber is a polymer optical fiber.
  • a coolant bus 5 is provided between the second lens 4 and the optical fiber rod 6 in order to prevent burning at the focal point of the incident light at the end of the optical fiber.
  • the cooling liquid which is a light-transmissive liquid, is filled therein.
  • a cooling liquid an oil having a high light transmittance and a small transmission loss of several percent, particularly a vegetable-based transparent oil (for example, camellia oil) is suitable.
  • camellia oil an optical oil and a mineral oil are also preferable. The heat resistance of the oil will be specifically described later.
  • This coolant is used to cool the end face of the optical fiber and to shield the end face of the optical fiber from air to prevent oxidation.
  • heat radiation may be sufficient to cool the heated coolant, but it is desirable to provide a fiber cooling fan 16 for forced air cooling outside the coolant booth 5.
  • a cooling liquid circulation system as shown in FIG. 3 may be provided to circulate the cooling liquid to the outside and cool it, which will be described later in detail.
  • the coolant booth 5 includes a ring-shaped fixing guide 7 between the second lens 4 and the optical fiber rod 6 and a ring-shaped coolant on both sides thereof. It is formed by disposing the seal packing 8.
  • the size of the coolant booth 5 is about 27 mm in diameter and about 12 mm in length, and can accommodate about 15 milliliters of coolant.
  • the outer periphery of the fixed guide 7 is supported in contact with and surrounded by the inner periphery of the optical fiber coupling 12.
  • the optical fiber unit coupling 12 is movable in the longitudinal direction with respect to the optical fiber fixing force ring 13 attached to the nozing room 15. Both couplings 12 and 13 are fixed at appropriate positions with fixing screws 13a.
  • a coolant extraction port 9 is provided at the top of the fixing guide 7, and the optical fiber unit fixing coupling is also provided.
  • 13 is provided with a coolant supply groove 13b, on which a removable lid 13c is mounted.
  • the presence of the cooling liquid has an effect of cooling a portion heated by the concentration of light at the end of the optical fiber. It is also thought that the cooling liquid itself may play the role of a lens, in which case it has the secondary effect of leading to light amplification.
  • FIG. 2 is a diagram showing a lens of another shape that can be used as the second lens 4 in the optical transmission device according to the first embodiment of the present invention.
  • a convex lens with a convex part on the light source side as shown in Fig. 1
  • a convex lens with a convex part on the optical fiber side as shown in (a) of Fig. 2 or a light source as shown in (b) in Fig. 2
  • a concave lens having a concave portion on the side, a convex lens having convex portions on both sides as shown in (c), an asymmetric convex lens as shown in (d), and a combination thereof can be used.
  • FIG. 3 is a diagram schematically showing a cooling liquid circulation system for circulating a cooling liquid to the outside and cooling in the optical transmission device according to the second embodiment of the present invention.
  • the optical transmission device main body a cross section of the cooling liquid booth 5 is shown, and an optical fiber rod 6 can be seen from the front.
  • the periphery of the coolant booth 5 is surrounded by a fixing guide 7, an optical fiber unit coupling 12, and an optical fiber unit fixing coupling 13. Therefore, the coolant inlet 13 d and coolant outlet 13 e are provided in the optical fiber fixing force coupling 13, and the coolant is also provided in the corresponding portions of the optical fiber coupling 12 and the fixing guide 7.
  • the coolant can be circulated to the outside.
  • the cooling liquid flowing out of the cooling liquid outlet 13 e of the optical transmission device main body passes through a condenser 31 provided outside the main body, and is cooled by a cooling fan 32 provided adjacent thereto.
  • the cooled liquid is returned to the cooling liquid inlet 13 d of the optical transmission device body again by the microphone circulation pump 33.
  • the flow rate of the pump 33 is 50 milliliters / minute.
  • FIG. 4 is a diagram showing a temperature measurement in the optical transmission device according to the first embodiment of the present invention. It is a figure showing an example of a result.
  • Light was continuously emitted during the c- test time of 72 hours, using 15 milliliters of camellia oil as the coolant. 7
  • the temperature at the first lens 2 15 mm away from the light source 1 after 2 hours is 1 35. C
  • the temperature at the second lens 4, 25 mm from the first lens is 105. C
  • the temperature at the optical fiber end face 12 mm away from the second lens via the cooling liquid was 75 ° C.
  • the temperature inside the coolant booth 5 was maintained at an average of about 65 ° C.
  • the optical fiber end temperature of 75 ° C was a temperature at which the durability of the POF optical fiber could be maintained.
  • FIG. 5 is a perspective view showing a configuration of an optical transmission device according to a third embodiment of the present invention.
  • the optical transmission device according to this embodiment includes a light source and an optical fiber port for transmitting illumination light to each unit in a housing frame.
  • Light source (lamp) 42, first cold mirror 43, light control lens 44, tank space 45, second cold mirror 42 46 and optical fiber rods 47 are arranged on the same axis. Light generated from the light source 42 passes through the first cold mirror 43, the light amount adjusting lens 44 and the second cold mirror 46, and is condensed on the optical fiber rod 47.
  • the light source 42 is a halogen lamp having an output of 250 W.
  • a heat exhaust fan 48 for cooling the light source is arranged on the side of the light source 42 in the housing frame 41.
  • the cold mirror 43 reflects and removes mainly infrared components of the light from the light source.
  • the optical fiber rod 47 is a PMMA optical fiber (for example, a single-core core diameter of 2.944 mm, a cladding of 0.0666 mm, and a diameter of 3 mm).
  • the optical fiber rod 47 is provided so as to be movable in the axial direction by a coupling sheath, an Asian star screw, or the like, as in the optical transmission device shown in FIG. It is positioned at the light position.
  • the tank space 45 is provided between the first cone mirror 43 and the optical fiber rod 47, and is filled with a cooling liquid that is a translucent liquid. Therefore, the light control lens 44 and the second cold mirror 46, the optical fiber The end of the mouth 47 is immersed in the coolant.
  • the same cooling liquid as that used in the optical transmission device shown in Fig. 1 is used.
  • the tank space 45 is provided with a coolant outlet 45 a and a coolant inlet 45 b.
  • the coolant flowing out of the coolant outlet 45 a passes through a heat sink 49 provided in the housing frame 41 and is cooled.
  • the cooled liquid is returned to the cooling liquid inlet 45 b of the tank space 45 by the microphone port circulation pump 50.
  • a heat-resistant plate 4 6 (fiber reinforced glass) may be inserted into the light source side of the tank space 45. In this case, the heat on the light source side is prevented from being transmitted to the cooling tank space 45.
  • the volume of the tank space 45 filled with the coolant is considerably larger than the volume of the coolant booth of the optical transmission device of FIG.
  • the light amount adjusting lens 44 and the cold mirror 46 are also immersed in the cooling liquid.
  • the light-emitting portion of the light source may reach a high temperature of 400 ° C. or more when turned on. In such a case, a temperature difference may occur between the liquid booth and the light-emitting part of the light source, which may cause the lens to crack. Therefore, use a heat-resistant Pyrex lens (made of glass with low coefficient of thermal expansion) for the light intensity adjustment lens. Is preferred. With such a configuration, the end of the optical fiber rod 47 can be cooled more effectively.
  • the optical transmission device of this embodiment includes a light source switching device 51.
  • the light source switching device 51 includes a spare halogen lamp 52 disposed below the halogen lamp of the light source 42 and a sensor for detecting lighting of the halogen lamp of the light source.
  • a sensor that detects the lamp current can be used.
  • a temperature sensor or an optical sensor may be arranged near the light source 42 or near the first cold mirror 43. These temperature sensors and optical sensors detect the temperature and heat when the light source 42 is turned on and emit a signal.
  • the signals of these sensors are sent to the control unit of the light source switching device 51 to determine whether the light source 42 is on or off.
  • the control unit determines that the optical transmission device is operating and the light source 42 is not lit, the control unit is provided at a predetermined position.
  • the broken ball indication lamp lights up to indicate that the light source 42 has broken.
  • the light source 42 and the spare halogen lamp 52 are attached to a slider 53 that can move up and down on the housing frame 41.
  • the slider 53 is controlled by the control unit of the light source switching device 51.
  • the signal of the lamp automatic switching switch is sent to the control section, the slider 53 slides upward, and the spare halogen lamp 52 moves to the original light source position.
  • the spare halogen lamp 52 is turned on and turned on.
  • the lamp may be replaced manually.
  • the optical transmission device of the present invention the following selections are also possible.
  • the light source can be freely selected from halogen lamps, xenon lamps, and metal halide lamps depending on the purpose of use.
  • FIG. 6 is a flowchart showing control of the optical transmission device according to the fourth embodiment of the present invention.
  • the optical transmission device according to this embodiment includes a temperature sensor in a booth or a tank in which the cooling water is stored, and detects the temperature of the cooling water. The output of the temperature sensor is sent to the control unit of the optical transmission device.
  • the light source When the operation of the optical transmission device is started, the light source is turned on in S1. The light source lights up until the end button is pressed in S2. With the end button not pressed in S2, read the temperature sensor output in S3. At this time, if the output of the temperature sensor is equal to or less than the predetermined value, the process returns to S2 and the light source is kept turned on until the end button is pressed. In S3, if the output of the temperature sensor is equal to or higher than the predetermined value.
  • the threshold value of the temperature of the coolant is, for example, about 50 ° C when a vegetable oil having a high optical effect (transparency) is used for the coolant. This is because the vegetable oil has a heat resistant temperature of 70 to 80 ° C. Since the particles of plant oil are a little large, it is thought that when exposed to light, the reflectivity and the refractive index will increase, and it will be slightly brighter.
  • the heat resistance temperature is about 100 ° C. If it exceeds 100 ° C, it becomes oxidized and discolored, making it unsuitable for use. In the case of a silicon-based oil with a heat resistance temperature of about 130 ° C, deterioration starts at about 150 ° C.
  • Squalane super oil manufactured by Ezet Co., Ltd.
  • the oil can be colored intentionally. For example, by using a light blue color, the sharpness of light can be improved.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

L'invention concerne un dispositif permettant d'empêcher la fonte de l'extrémité d'une fibre optique polymère lorsqu'une lumière d'intensité élevée frappe sa surface de manière incidente. Une cabine de refroidissement (5) remplie d'un liquide transparent est placée entre une extrémité de ladite fibre (6a) et l'extrémité correspondante d'un système optique (lentilles (2, 4)) comprenant une source lumineuse (1). Le liquide transparent refroidit l'extrémité de la fibre (6a) et la protège de l'air.
PCT/JP2000/007180 1999-10-19 2000-10-17 Procede permettant d'empecher la fonte d'une fibre optique en plastique, et dispositif de transmission optique WO2001029600A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU76878/00A AU7687800A (en) 1999-10-19 2000-10-17 Method of preventing burnout of plastic optical fiber, and optical transmission device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP11/296679 1999-10-19
JP29667999A JP2003294976A (ja) 1999-10-19 1999-10-19 樹脂系光ファイバの焼損防止方法及び光伝送装置
JP2000273094A JP2005099062A (ja) 2000-09-08 2000-09-08 樹脂系光ファイバの焼損防止方法及び光伝送装置
JP2000/273094 2000-09-08

Publications (1)

Publication Number Publication Date
WO2001029600A1 true WO2001029600A1 (fr) 2001-04-26

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PCT/JP2000/007180 WO2001029600A1 (fr) 1999-10-19 2000-10-17 Procede permettant d'empecher la fonte d'une fibre optique en plastique, et dispositif de transmission optique

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AU (1) AU7687800A (fr)
WO (1) WO2001029600A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003517616A (ja) * 1999-12-15 2003-05-27 ペルマノヴァ・レーザーシステム・エービー ファイバー光学接触手段内の光パワー損失を測定するための方法と装置
DE10303857A1 (de) * 2003-01-30 2004-08-26 Schott Glas Vorrichtung zur Übertragung von Licht energiereicher Lichtquellen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945457A (en) * 1989-01-23 1990-07-31 Nei Canada Limited Cool light source for optic fibres
JPH0515391U (ja) * 1991-08-02 1993-02-26 株式会社モリテツクス 照明用光源装置
JPH08292339A (ja) * 1995-04-24 1996-11-05 Siemens Ag 光ファイバ照射装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945457A (en) * 1989-01-23 1990-07-31 Nei Canada Limited Cool light source for optic fibres
JPH0515391U (ja) * 1991-08-02 1993-02-26 株式会社モリテツクス 照明用光源装置
JPH08292339A (ja) * 1995-04-24 1996-11-05 Siemens Ag 光ファイバ照射装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003517616A (ja) * 1999-12-15 2003-05-27 ペルマノヴァ・レーザーシステム・エービー ファイバー光学接触手段内の光パワー損失を測定するための方法と装置
JP4975927B2 (ja) * 1999-12-15 2012-07-11 オプトスカンド エービー ファイバー光学接触手段内の光パワー損失を測定するための方法と装置
DE10303857A1 (de) * 2003-01-30 2004-08-26 Schott Glas Vorrichtung zur Übertragung von Licht energiereicher Lichtquellen

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