WO1999042878A1 - Überlastschutz zur vermeidung einer beschädigung optischer komponenten - Google Patents
Überlastschutz zur vermeidung einer beschädigung optischer komponenten Download PDFInfo
- Publication number
- WO1999042878A1 WO1999042878A1 PCT/DE1999/000452 DE9900452W WO9942878A1 WO 1999042878 A1 WO1999042878 A1 WO 1999042878A1 DE 9900452 W DE9900452 W DE 9900452W WO 9942878 A1 WO9942878 A1 WO 9942878A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- overload protection
- protection according
- reducing
- optical component
- Prior art date
Links
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
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
-
- 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
- G02B2006/4297—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources having protection means, e.g. protecting humans against accidental exposure to harmful laser radiation
Definitions
- the invention relates to an overload protection to avoid damage to optical components due to excessive light output of a light source, in particular to protect a glass fiber system used to transmit laser light.
- the optical components or systems to be protected here are, for example, glass fiber systems for transmitting laser light to a measuring system.
- glass fiber systems are used, among other things. used in confocal microscopy.
- Lasers are often used here, which have large differences in intensity in individual lines, so that the total laser power must be set extremely high in order to also stimulate individual weak lines. Accordingly, the total output power of such lasers can be so high that the destruction threshold of a glass fiber system is exceeded.
- lasers with several world lengths have a high light output at the laser output, which is in the range between 2 and 3 watts. If the destructibility of a glass fiber system is exceeded - by the coupled laser beam - one speaks of the "death" of the fiber, because the fiber entry is literally burned.
- the invention is therefore based on the object of designing and developing an overload protection to prevent damage to optical components due to excessive light output of a light source, in particular for protecting a glass fiber system used for the transmission of laser light, in such a way that a sufficient means with simple means and without switching off the light source Protection of the optical component exposed to the light is achieved. If the optical component is a glass fiber system, burning of the fiber entrance should be effectively avoided.
- the overload protection according to the invention of the type in question solves the above object by the features of claim 1.
- the overload protection to avoid damage to optical components due to excessive light output of a light source comprises a decoupling device arranged in the beam path between the light source and the optical component for decoupling a small proportion of the light, a detector for detecting the light intensity of the outcoupled light, an electronic evaluation unit for comparing the detected light intensity with a specifiable maximum or welding value and a device for reducing the light output or for switching off of the light striking the optical component in the event that the maximum value is exceeded.
- the optical component can be protected by detecting its intensity or power directly in the beam path of the light, it being specifically proposed here to decouple a small proportion of the light from the beam path.
- the outcoupled small proportion of the light is detected with regard to the light intensity and compared with a predetermined maximum value within an electronic evaluation unit.
- This maximum value must of course relate to the light-optical capacity of the optical component.
- the coupling-out device forms. the detector and the device for reducing the light output or for switching off the light striking the optical component has a control loop which then acts on the beam path directed at the optical component when the predetermined maximum value of the light intensity is exceeded.
- the device for reducing the light output or for switching off the light striking the optical component can have different effects. For example, it is possible that the device for reducing the light output immediately dims or throttles the light source or - in extreme cases - even switches it off, it being possible to define a complete switch-off as an "emergency stop " . It is particularly advantageous However, it is possible to implement the device for reducing the light output as a filter arranged between the light source and the optical component, which can also be a filter combination, This filter combination could, for example, include filter wheels or similar constructive measures or the filter combination can be ensured that a reduction in the light intensity or light output impinging on the optical component is possible, depending on the detected light output.
- AOTF acousto-optical filter
- the primary light or laser beam would be weakened in its amplitude to below the maximum value and thus harmless intensity values via the electronic control of the AOTF.
- the device for reducing the light output comprises a mechanical shutter unit, a shutter, arranged between the light source and the optical component. If the set maximum value of the light intensity is exceeded, the primary light beam would be blocked by the mechanical shutter, which ensures protection of the optical components with simple means.
- a coupling-out device is provided for the detection of the light intensity, which coupling-out a small proportion of the light striking the optical component.
- This decoupling device could be designed as a beam splitter. Specifically, this could be a glass beam splitter plate, i.e. a glass plate. Such a glass plate is particularly suitable as a beam splitter, since such a plate - without further coating - can already be used for partial reflection of approximately 4% to 6% of the incident light. A corresponding range - from about 4% to 6%, preferably from 5% of the light beam - should be coupled out for the detection of the light intensity.
- the decoupling device and the device for reducing the light output could be combined to form a structural unit arranged in the beam path of the light.
- both devices could be arranged within a single housing, with one light entry and two light exits there - on the one hand for the primary light beam and on the other hand for the outcoupled light.
- the overload protection comprises an outcoupling device 4 arranged in the beam path 1 between a laser light source 2 and a glass fiber 3 for outcoupling a small portion of the primary laser light 5. Furthermore, in the beam path 6 of the outcoupled laser light there is a detector 7 for detecting the light intensity or light output of the decoupled light provided. An electronic evaluation unit 8 for comparing the detected light intensity with a predeterminable maximum value is connected downstream of the detector 7. Finally, a device 9, 11 for reducing the light output or even for switching off 9, 12 of the laser light 5 striking the glass fiber 3 is provided, namely in the event that the predeterminable maximum value is exceeded.
- the figure indicates that the decoupling device 4, the detector 7, the evaluation unit 8 and finally the device 9 for reducing the light output form a control loop.
- the overload protection described above ensures that the to a system 10 - e.g. a microscope-guiding glass fiber 3 is effectively protected against excessive light output of the coupling laser light 5.
- the device 9 for reducing the light output consists of a combination between an acousto-optical filter (AOTF) 11 and a mechanical shutter 12 designed as a shutter between the laser light source 2 and the glass fiber 3 arranged unit - AOTF 11, mechanical closure part 12 - allows laser lines to be selected individually or together, namely through the acousto-optical filter 11 provided there and the closure part 12, the two components - AOTF 11 and mechanical closure part 12 - complete.
- AOTF acousto-optical filter
- mechanical shutter 12 designed as a shutter between the laser light source 2 and the glass fiber 3 arranged unit - AOTF 11, mechanical closure part 12 - allows laser lines to be selected individually or together, namely through the acousto-optical filter 11 provided there and the closure part 12, the two components - AOTF 11 and mechanical closure part 12 - complete.
- An alternative arrangement of one or the other component is also conceivable.
- the coupling-out device 4 comprises a beam splitter, specifically a glass plate 13 or a beam splitter plate made of glass. With the aid of the coupling-out device 4, coupling-out takes place in the range between 4% and 6% of the primary laser light 5.
- the overload protection according to the invention is ideally suited for use in confocal microscopy, namely as overload protection for the glass fiber used for the transmission of laser light.
- the measures according to the invention make it possible to use stronger and thus more versatile Muitiline lasers without risk, the life of the glass fiber being increased by limiting the power of the laser light without affecting the laser light source through switching measures.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Lasers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99910142A EP0976000A1 (de) | 1998-02-19 | 1999-02-18 | Überlastschutz zur vermeidung einer beschädigung optischer komponenten |
US09/402,340 US6421475B1 (en) | 1998-02-19 | 1999-02-18 | Overload protection system for avoiding damage to optical components |
JP54197999A JP4396997B2 (ja) | 1998-02-19 | 1999-02-18 | ガラスファイバーシステムの損傷を防止するための過負荷保護装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19806866 | 1998-02-19 | ||
DE19806866.2 | 1998-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999042878A1 true WO1999042878A1 (de) | 1999-08-26 |
Family
ID=7858227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/000452 WO1999042878A1 (de) | 1998-02-19 | 1999-02-18 | Überlastschutz zur vermeidung einer beschädigung optischer komponenten |
Country Status (5)
Country | Link |
---|---|
US (1) | US6421475B1 (de) |
EP (1) | EP0976000A1 (de) |
JP (1) | JP4396997B2 (de) |
DE (1) | DE19906769A1 (de) |
WO (1) | WO1999042878A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002072098A (ja) * | 2000-07-10 | 2002-03-12 | Leica Microsystems Heidelberg Gmbh | 光学組立物および共焦点走査型顕微鏡に少なくとも1つの波長の光を結合するための装置 |
EP2795282A4 (de) * | 2011-12-19 | 2015-08-12 | Optoskand Ab | Vorrichtung zur überwachung der prozessleistung eines lasersystems mit einem faseroptischen stromkabel |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014222738B4 (de) * | 2014-11-06 | 2019-07-18 | Leoni Kabel Gmbh | Faseroptik, insbesondere Lasersonde, sowie Lasersystem mit einer solchen Faseroptik |
NZ739860A (en) | 2015-08-18 | 2019-10-25 | Magic Leap Inc | Virtual and augmented reality systems and methods |
US10735649B2 (en) | 2018-02-22 | 2020-08-04 | Magic Leap, Inc. | Virtual and augmented reality systems and methods using display system control information embedded in image data |
CN114414216B (zh) * | 2022-03-31 | 2022-06-28 | 深圳市先地图像科技有限公司 | 一种激光器的功率监测装置及监测方法 |
CN117740144B (zh) * | 2023-11-21 | 2024-06-28 | 同济大学 | 一种大口径激光光斑形貌的测量装置及方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4543477A (en) * | 1982-04-19 | 1985-09-24 | Asahi Kogaku Kogyo Kabushiki Kaisha | Safety device for detecting trouble in optical transmission fibers |
EP0245552A1 (de) * | 1986-05-16 | 1987-11-19 | GV Medical, Inc. | Kathetervorrichtung mit Laser |
EP0329492A2 (de) * | 1988-02-18 | 1989-08-23 | Bjorn A. J. Angelsen | Mit Laser versehene Kathetervorrichtung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2470397A1 (fr) * | 1979-11-21 | 1981-05-29 | Thomson Csf | Attenuateur optique a attenuation controlee |
US4443696A (en) * | 1981-08-28 | 1984-04-17 | John Taboada | Optical beam intensity control system |
US4682594A (en) * | 1985-03-11 | 1987-07-28 | Mcm Laboratories, Inc. | Probe-and-fire lasers |
US4994059A (en) * | 1986-05-09 | 1991-02-19 | Gv Medical, Inc. | Laser catheter feedback system |
US5057099A (en) * | 1987-02-27 | 1991-10-15 | Xintec Corporation | Method for laser surgery |
US4928284A (en) * | 1988-09-28 | 1990-05-22 | Lasa Industries, Inc. | Laser power control system |
JPH03276782A (ja) * | 1990-03-27 | 1991-12-06 | Matsushita Electric Ind Co Ltd | パルス光源 |
US5157676A (en) * | 1990-06-19 | 1992-10-20 | The United States Of America As Represented By The United States Department Of Energy | Apparatus and process for active pulse intensity control of laser beam |
US5357097A (en) * | 1991-11-25 | 1994-10-18 | Nec Corporation | Method and apparatus for controlling acousto-optic filter |
GB9306090D0 (en) * | 1993-03-24 | 1993-05-12 | Bt & D Technologies Ltd | Optical responder |
-
1999
- 1999-02-17 DE DE19906769A patent/DE19906769A1/de not_active Ceased
- 1999-02-18 EP EP99910142A patent/EP0976000A1/de not_active Withdrawn
- 1999-02-18 US US09/402,340 patent/US6421475B1/en not_active Expired - Lifetime
- 1999-02-18 WO PCT/DE1999/000452 patent/WO1999042878A1/de not_active Application Discontinuation
- 1999-02-18 JP JP54197999A patent/JP4396997B2/ja not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4543477A (en) * | 1982-04-19 | 1985-09-24 | Asahi Kogaku Kogyo Kabushiki Kaisha | Safety device for detecting trouble in optical transmission fibers |
EP0245552A1 (de) * | 1986-05-16 | 1987-11-19 | GV Medical, Inc. | Kathetervorrichtung mit Laser |
EP0329492A2 (de) * | 1988-02-18 | 1989-08-23 | Bjorn A. J. Angelsen | Mit Laser versehene Kathetervorrichtung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002072098A (ja) * | 2000-07-10 | 2002-03-12 | Leica Microsystems Heidelberg Gmbh | 光学組立物および共焦点走査型顕微鏡に少なくとも1つの波長の光を結合するための装置 |
EP2795282A4 (de) * | 2011-12-19 | 2015-08-12 | Optoskand Ab | Vorrichtung zur überwachung der prozessleistung eines lasersystems mit einem faseroptischen stromkabel |
Also Published As
Publication number | Publication date |
---|---|
EP0976000A1 (de) | 2000-02-02 |
DE19906769A1 (de) | 1999-12-16 |
JP2001520766A (ja) | 2001-10-30 |
JP4396997B2 (ja) | 2010-01-13 |
US6421475B1 (en) | 2002-07-16 |
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