EP1735657A1 - Dispositif optique permettant de aufbereiten un faisceau, notamment un faisceau laser - Google Patents

Dispositif optique permettant de aufbereiten un faisceau, notamment un faisceau laser

Info

Publication number
EP1735657A1
EP1735657A1 EP05737877A EP05737877A EP1735657A1 EP 1735657 A1 EP1735657 A1 EP 1735657A1 EP 05737877 A EP05737877 A EP 05737877A EP 05737877 A EP05737877 A EP 05737877A EP 1735657 A1 EP1735657 A1 EP 1735657A1
Authority
EP
European Patent Office
Prior art keywords
coupling prism
optical device
input beam
optical
coupling
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP05737877A
Other languages
German (de)
English (en)
Inventor
Bernd Ozygus
Juergen Erhard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1735657A1 publication Critical patent/EP1735657A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0972—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar

Definitions

  • the invention relates to an optical device for
  • a beam with a flat cross section into a beam with a less flat cross section, in particular a laser beam, with at least one optical element, into which at least a part of the beam is coupled as an input beam and from which at least a part of the beam emerges as an output beam.
  • the radiation from laser diodes is generally very astigmatic. This means that the extent of the radiation source and the angle of radiation of the light are different in the two room reindeer rings. This generally results in beam cross sections which have a very large width compared to the height. In particular, the radiation from laser diode bars cannot therefore be coupled directly into an optical fiber. An attempt is therefore made to prepare the beam so that its cross section is as symmetrical as possible by reducing the width and increasing the height. The ideal would be a radiation field that is as wide as it is high and has the same divergences in both directions. To this To achieve the goal or at least get close, "re-stacking methods" are used. In these areas of the radiation field of an input beam are shifted such that the output beam has at least approximately a desired intensity distribution.
  • a device which uses a plate cutter.
  • the beam offset in the Durcb passage is used by a plurality of plane-parallel plates.
  • the angle between the beam direction and the surface of the plate inside and outside the plate depends on the refractive index of the
  • the object of the present invention is to develop a device of the type mentioned at the outset in such a way that it can be manufactured and used more cheaply.
  • the optical element comprises a body which is at least sparing for the wavelengths of the beam t, b. which has two opposite surfaces with a central plane which is oriented such that it includes a first angle with a first spatial axis orthogonal to the longitudinal axis of the input beam and a second angle with a second spatial axis orthogonal to the longitudinal axis of the input beam and the first spatial axis, each of which is larger Are zero, and c. a coupling prism for coupling the input beam into the body on one surface and a coupling prism for coupling the output beam out of the body are arranged on the opposite surface of the body, d. wherein the coupling prism and the coupling prism, viewed in the direction of the longitudinal axis of the input beam, cover different areas on the body.
  • the device according to the invention can be produced very inexpensively, since instead of mirrors or thin and fan-shaped plates, a single transparent (for example crystal-clear) body is simply used, which is geometrically tilted and pivoted with respect to the longitudinal axis of the input beam in such a way that in light rays coupled in are totally reflected on the opposite surfaces and areas of the beam are "stacked". Corresponding prisms are used to couple in and out the light beam, which can also be easily manufactured. For beam preparation, only a maximum of three elements are required, which are also geometrically simple and easily adjustable relative to one another. The costs to be expended for beam processing, in particular in the case of laser diodes, are thus considerably reduced by the device according to the invention.
  • the physical effect used according to the invention is total reflection within an "optically dense" medium, in which light which is located inside a body which has a higher refractive index than the medium surrounding it (for example air) experiences total reflection within certain critical angles ,
  • the pivoting and tilting of the central plane of the body with respect to a plane perpendicular to the input beam and the distance between the two opposite surfaces determine the type and extent of the stacking.
  • the pivoting of the central plane is about an axis perpendicular to the plane of the input beam for the shift of areas of the radiation field in the direction of the plane of the Eixigangs beam is responsible ("slow axis"), whereas the generation of a certain "thickness" of the output beam is responsible for the tilting of the central plane about an axis that is perpendicular to the longitudinal axis of the input beam and in the plane of the input beam.
  • a first particularly preferred development is characterized in that the opposite surfaces of the optical body are at least approximately plane-parallel and flat. Basically, this creates a flat plate or square, which is particularly easy to manufacture. In addition: the course of the radiation in plane-parallel surfaces, which cause the total reflection of the radiation, is particularly easy to determine in advance.
  • the angle between the central plane and the first spatial axis is in the range from 40 ° to 50 ° and the angle between the central plane and the second spatial axis in the range from 5 ° to 60 °, in particular in the range from 30 ° to 40 ° lies, with the first spatial axis in the plane of the input beam.
  • the input beams in particular, which are generated by laser diode bars, can be processed very well, at the same time having small dimensions of the device and being easier and thus also more economical to manufacture.
  • a further advantageous embodiment of the optical device according to the invention is characterized in that the coupling prism is arranged in the region of a longitudinal edge of the body closest to the input beam, and the coupling prism is arranged in the region of a side edge of the body remote from the input beam.
  • the optical device can be formed in that the coupling prism and / or the coupling prism are / are connected to the body by means of an optical cement.
  • the coupling prism, the coupling prism and the body can be produced as separate elements which can be assembled in the manner of a modular system in accordance with the individual application requirements. It is conceivable, for example, to produce different sets of coupling prisms, coupling prisms and bodies, which can then be combined with one another as desired. As a result, optimal results are achieved under very different operating conditions at low costs.
  • a material whose refractive index corresponds as exactly as possible to that of the body and the prisms for example a UV-curing adhesive, can be used as a cement.
  • the coupling prism and / or the coupling prism in one piece with the body and preferably from the same material as the body.
  • the one-piece design of the optical device which is realized in this way simplifies handling during installation and reduces the risk of optical losses when the beam is coupled into the body and when the beam is coupled out of the body. Furthermore, separate assembly elements can be dispensed with.
  • the optical device according to the invention can be produced particularly inexpensively if the body, the coupling prism, the coupling prism or the one-piece unit comprising at least two of the previous elements are or are produced as an injection molded part, preferably made of plastic.
  • a collimation device is optically connected to the coupling prism and / or a focusing device is optically connected to the coupling prism or is integrated therein.
  • the optical device not only takes over the "stacking" but also the collimation, in particular of the fast axis. and / or the coupling of the beam into an optical fiber, for example.
  • the focusing device comprises a toric curved exit surface on the coupling-out prism.
  • a toric lens that is integral with the coupling-out prism is created, which has different focal lengths for the two spatial directions.
  • This unequal Focal lengths are required because the divergent differences, especially with laser radiation, are clearly different for the two spatial directions.
  • a toric curved exit surface can be realized on the AuskoppeL prism in a simple and inexpensive way.
  • the focusing device may comprise a light concentrator connected to the coupling-out prism, which is designed as a monolithic component and focuses the radiation through the plurality of total reflections on its outer boundary surfaces.
  • a focusing device also referred to as a "lens duct”
  • the dimensions of the light concentrator have to be adapted to the requirements placed on the focusing of the light beam. In most cases, the width of the radiation field will have to be reduced for both spatial directions.
  • the outer surfaces of the light concentrator, on which the total reflections take place can be both planar and curved.
  • a light concentrator in the "proposed type has the advantage that when the light is coupled into an optical fiber, the adjustment of the fiber can be dispensed with.
  • the fiber can be glued to the end of the light concentrator Costs saved in the manufacture and assembly of the optical device.
  • Collimating device comprises an entry surface on the coupling prism designed as a convexly curved lens. This also creates a lens "which collimates the radiation in the direction of the fast axis such a lens has a very large opening angle, so that only an aspherical surface comes into question.
  • the invention also relates to a steel shaping device for laser diode stacks. It is proposed that it comprises a plurality of optical devices of the above type, which are arranged one above the other in a stack. With such a beam shaping device, the radiation field of a stack of laser diode bars can be prepared in a simple manner.
  • Figure 1 shows a laser diode bar with an actual beam shape and a target beam shape
  • FIG. 2 shows a perspective view obliquely from behind of a first embodiment of an optical device for processing the laser beam from FIG. 1;
  • FIG. 3 shows a perspective view of the optical device from FIG. 2 from the front diagonally
  • FIG. 4 shows a perspective detailed illustration of an optical body of the optical device from FIG. 2;
  • Figure 5 is a perspective view obliquely from the front of a second embodiment of an optical device;
  • Figure 6 is a perspective view obliquely from behind of the optical device of Figure -5;
  • FIG. 7 shows a perspective illustration of an optical device according to FIG. 5 with a light concentrator
  • FIG. 8 shows a schematic illustration to explain the functional principle of the light concentrator from FIG. 7;
  • Figure 9 is a perspective view similar to Figure 6 of a third embodiment of an optical device
  • Figure 10 is a perspective view of a portion of a fourth embodiment of an optical device
  • FIG. 11 shows a perspective view obliquely from the front of a stack of several optical devices according to a sixth embodiment
  • Figure 12 is a perspective view obliquely from the rear of the stack of Figure 11.
  • a laser diode bar bears the reference number 10 overall.
  • the laser beam emitted by it is collimated with the aid of a cylindrical lens 12 in the direction of the fast axis.
  • the result is a laser beam 14 which is comparatively wide and flat
  • the laser beam 14 is to be symmetrized by means of a suitable device, which will be discussed in more detail below and which is symbolized in FIG. 1 only by an arrow 16. This means that the output beam 18 emerging from the optical device 16 is less wide and less flat than the input beam 14. It should be pointed out at this point that a “beam” here and below can also be understood to mean a bundle of individual beams.
  • the optical device 16 is shown in greater detail in FIGS. 2 and 3: It comprises a base plate 20, the plane of which is approximately parallel to the plane of the
  • Input beam 14 is.
  • a plate-shaped optical body 22 is mounted on the base plate 20. This is not perpendicular to the base plate 20, but, viewed in the direction of the input beam 14, is tilted backwards. In addition, the optical body 22 is also still around. an axis perpendicular to the plane of the input beam 14 is pivoted, that is to say it is inclined on the base plate 20. The exact geometric orientation of the optical body 22 is described below.
  • a coupling prism 24 is also mounted on the base plate 20, which has approximately the basic shape of a right-angled triangle and is placed flat on the base plate 20.
  • a hypotenuse surface 26 of the coupling prism 24 (FIG. 3) is over an optical cement (not shown) connected to the surface 28 of the optical body 22 facing the input beam 14 and covers an area 27 there.
  • the coupling prism 24 lies flat against the front surface 28 of the optical body 22, specifically in
  • An entry surface 30 of the coupling prism 24, which is formed by a catheter surface, is generally perpendicular to the input beam 14.
  • a coupling-out prism 34 is arranged on the base plate 20 on a rear surface 32 of the optical body 22. This is designed as an octagonal, irregular block. The side, top and bottom surfaces of the
  • Coupling prisms which are not provided with reference numerals, are aligned overall parallel to the axis of the input beam 14 and also of the output beam 18.
  • a contact surface 36 facing the optical body 22 is designed obliquely or tilted in both directions in such a way that it lies flat against the rear surface 32 of the optical body 22 at least in regions by means of an optical cement and covers an area 37 there.
  • An exit surface 38 of the coupling-out prism 34 opposite the contact surface 36 is again perpendicular to the axis of the output beam 18.
  • the coupling prism 24, the coupling prism 34 and the plate-shaped optical body 22 are each made as separate parts made of glass.
  • the coupling prism 24 serves to couple the input beam 14 into the optical body 22.
  • the coupling prism 34 has the function of coupling the output beam 18 out of the optical body 22. The actual preparation by re-stacking the laser radiation takes place in the optical body 22 through a large number of total reflections. This will now be explained with reference to FIG. 4:
  • a longitudinal axis of the input beam 14 is indicated as a dash-dotted line which bears the reference symbol 40.
  • the plane of the input beam 14 is drawn in dash-dotted lines and designated 42.
  • Input beam 14 orthogonal spatial axis X is designated 44 and lies in the plane 42 of the input beam.
  • a second Y axis orthogonal to the longitudinal axis 40 of the input beam 14 is perpendicular to the plane 42 of the input beam 14 and is designated by 46.
  • a central plane 48 is defined between the two surfaces 28 and 32 of the optical body 22. As already mentioned at the beginning, this is tilted backward by an angle A with respect to the Y axis 46. It is also pivoted by an angle B with respect to the X axis 44.
  • this is tilted backward by an angle A with respect to the Y axis 46. It is also pivoted by an angle B with respect to the X axis 44.
  • the angle A is approximately 35 °
  • the angle B is 45 °
  • a thickness D of the plate-shaped optical body 22 is the same everywhere and is approximately 0.7 mm in the present exemplary embodiment.
  • the principle of total reflection is used in the beam preparation within the optical body 22. This means that light, which is located within the optical body 22, the material of which has a higher refractive index than the medium surrounding it (generally air), is completely reflected within certain critical angles at the exposed areas of the surfaces 28 and 32. At the not exposed areas of the surfaces 28 and 32 of the optical Body 22, namely the area 27 covered by the hypotenuse surface 26 of the coupling prism 24 and the area 37 covered by the contact surface 36 of the coupling prism 34 (compare FIGS. 2 and 3), however, there is no total reflection, since the coupling prism 24,
  • Coupling prism 34 and optical body 22 are made of the same material with the same refractive index.
  • the beam path of the partial beam 14a of the input beam 14 is considered: This is coupled into the optical body 22 through the coupling prism 24 (not shown in FIG. 4). In the area of a point 50, however, the areas 27 and 37 overlap.
  • the input beam 14a is therefore not reflected on the rear surface 32 of the optical body 22, but is immediately coupled out again from the optical body 22 via the coupling prism 34. It emerges as partial beam 18b from the optical body 22 and finally from the coupling-out prism 34.
  • the partial output beam 18a has the same direction and position as the partial input beam 14a.
  • the partial input beam 14b is also coupled into the optical body 22 via the coupling prism 24. However, this takes place at a point 52 where the rear surface 32 is exposed. Due to the inclination of the optical body 22 and thus also the rear surface 32, the partial input beam 14b is completely reflected at a point 54a on the free rear surface 32. Due to the pivoting of the central plane 48 and thereby also the two surfaces 28 and 32 by the angle B about the Y axis 46, the input beam 14b does not strike the rear surface 32 perpendicularly, but rather obliquely, and is therefore reflected to the side. Due to the tilt of the central plane 48 and thereby also the rear surface 32 by the angle A about the X-axis 44, the partial input beam 14b is also reflected obliquely upwards relative to the central plane 48 at the reflection point 54a.
  • the partial input beam 14b again strikes the front surface 28 of the optical body 22. This point is located outside the region 27 covered by the hypotenuse surface 26 of the coupling prism 24 on the front surface 28 of the optical body 22.
  • the input beam 14b is again reflected at the point 54b in the direction of the original axis 40, in order then to hit the rear surface 32 of the optical body 22 again in 54c.
  • This back-and-forth reflection of the input beam 14b continues within the optical body 22 until it reaches the area 37 of the rear surface 32 of the optical body 22 covered by the contact surface 36 of the coupling-out prism 34. In this area, the input beam 14b is coupled out of the optical body 22 at position 58 and arrives in the coupling-out prism 34. There it emerges from the exit surface 38 as a partial output beam 18b.
  • the total right-hand region 14b of the input beam 14 seen in the beam direction is “stacked” by the total reflections within the optical body 22, so that it emerges as a partial output beam 18b lying above the partial region 18a Device 16 exits.
  • the wide and flat input beam 14 is transformed by the optical device 16, which comprises the coupling prism 24, the optical body 22 and the coupling prism 34, into a less wide and therefore significantly thicker output beam 18b.
  • the Input beam 14 does not have any discrete partial beams in reality. It is different with output beam 18: this actually consists of a stack of partial output beams 18a, 18b, ....
  • the number and the distance between the partial output beams is set on the one hand by the plate thickness D and by the angles A and B.
  • optical devices 16 are described below. Elements and areas which have functions equivalent to elements and areas of previously described exemplary embodiments have the same reference symbols. They are generally not explained in detail again.
  • the optical body 22 In the optical device 16 shown in FIGS. 5 and 6, the optical body 22, the coupling prism 24 and the coupling prism 34 are formed in one piece as a monolithic unit. A base plate is not present in this embodiment. The in the
  • Figures 5 and 6 shown optical device 16 is made as a plastic injection molded part.
  • the optical device 16 can also perform other functions, for example the
  • a focusing device 62 is attached to the exit surface 38 of the coupling prism 34, which in the exemplary embodiment shown in FIG. 7 is designed as a light concentrator, which is also referred to as a “lens duct”.
  • the radiation is focused by means of several total reflections on its exposed side surfaces.
  • the optical fiber 60 is simply glued to the end of the light concentrator 62.
  • the principle of one Light concentrator is shown in Figure 8.
  • An arrow 63 indicates the beam direction.
  • the dimensions of the light concentrator 62 have to be adapted to the individual requirements of the respective operating case. In most cases, the width of the radiation field will have to be reduced for both spatial directions.
  • the outer surfaces of the light concentrator shown in FIG. 8 are straight. However, they can also be curved.
  • the focusing device 62 is designed as a toric lens, which is created by a correspondingly curved configuration of the exit surface 38 on the coupling-out prism 34. In this way, different focal lengths can be realized for the two spatial directions. Such unequal focal lengths are necessary because the divergences of the output beam 18 can be significantly different in the two spatial directions.
  • the entry surface 30 on the coupling prism 24 is designed as an aspherical lens 66 by the entry surface 30 being convexly curved, as shown in FIG. 10 can be seen.
  • laser diode bars are also stacked as a laser diode stack.
  • five laser diode bars 10a to e are stacked as a laser diode stack 68.
  • five optical devices 16a-16e are therefore stacked one above the other for beam shaping. It can be seen that the height of the optical body 22 in the in the 11 and 12 optical devices 16 is significantly lower than, for example, in the embodiment shown in FIGS. 2 and 3.
  • a square, elongated spacer block 70 is placed on each of the coupling prisms 24, by means of which the individual optical devices 16a to 16e can be stacked precisely and in parallel.
  • the arrangement of FIGS. 11 and 12 divides the radiation field of each laser diode bar 10a to 10e and the individual radiation fields are stacked one on top of the other.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention concerne un dispositif optique (16) permettant de Aufbereiten un faisceau laser. Ce dispositif optique comprend un élément optique (22) dans lequel est injecté au moins un faisceau entrant et duquel sort un faisceau sortant. L'élément optique comprend un corps transparent (22) qui présente deux surfaces opposées (28, 32) ayant un plan central orienté de telle façon qu'il forme un premier angle avec un premier axe spatial perpendiculaire à l'axe longitudinal du faisceau entrant et un deuxième angle avec un deuxième axe spatial perpendiculaire à l'axe longitudinal du faisceau entrant et perpendiculaire au premier axe spatial, ces angles étant respectivement supérieurs à zéro. Un prisme d'injection (24) permet d'injecter le faisceau entrant dans le corps (22) sur une surface (28) et un prisme de prélèvement (34) permet de prélever le faisceau sortant du corps (22) sur la surface opposée (32) du corps (22). Le prisme d'injection (24) et le prisme de prélèvement (34) recouvrent différentes zones du corps (22) vu en direction de l axe longitudinal du faisceau entrant.
EP05737877A 2004-04-01 2005-02-28 Dispositif optique permettant de aufbereiten un faisceau, notamment un faisceau laser Withdrawn EP1735657A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004016835A DE102004016835A1 (de) 2004-04-01 2004-04-01 Optische Vorrichtung zum Aufbereiten eines Strahles, insbesondere eines Laserstrahles
PCT/EP2005/050851 WO2005096072A1 (fr) 2004-04-01 2005-02-28 Dispositif optique permettant de aufbereiten un faisceau, notamment un faisceau laser

Publications (1)

Publication Number Publication Date
EP1735657A1 true EP1735657A1 (fr) 2006-12-27

Family

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Family Applications (1)

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EP05737877A Withdrawn EP1735657A1 (fr) 2004-04-01 2005-02-28 Dispositif optique permettant de aufbereiten un faisceau, notamment un faisceau laser

Country Status (6)

Country Link
US (1) US20070273976A1 (fr)
EP (1) EP1735657A1 (fr)
JP (1) JP2007531028A (fr)
CN (1) CN1934486A (fr)
DE (1) DE102004016835A1 (fr)
WO (1) WO2005096072A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102007040119A1 (de) 2007-08-24 2009-02-26 Robert Bosch Gmbh Zündeinrichtung für eine Brennkraftmaschine
WO2014026713A1 (fr) 2012-08-15 2014-02-20 Limo Patentverwaltung Gmbh & Co. Kg Dispositif de formation de faisceau et dispositif à laser équipé d'au moins un dispositif de formation de faisceau
DE102014203479B3 (de) * 2014-02-26 2015-07-02 Forschungsverbund Berlin E.V. Lichtleitvorrichtung und Vorrichtung umfassend eine Lichtleitvorrichtung und Mittel zur Ausstrahlung linear angeordneter, paralleler Lichtstrahlen
US10401633B2 (en) * 2015-06-23 2019-09-03 TeraDiode, Inc. Optical element arrangements for varying beam parameter product in laser delivery systems
DE102015116402A1 (de) 2015-09-28 2017-03-30 Carl Zeiss Smart Optics Gmbh Optisches Bauteil und Verfahren zu seiner Herstellung
EP3506437A4 (fr) * 2016-08-26 2019-11-27 Panasonic Intellectual Property Management Co., Ltd. Module laser

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US4128308A (en) * 1977-04-14 1978-12-05 Mcnaney Joseph T Optical system for changing the cross sectional dimensions of a collimated beam of light
US4623225A (en) * 1984-06-29 1986-11-18 Melles Griot, Irvine Company Anamorphic prism for beam shaping
US5155633A (en) * 1991-07-30 1992-10-13 Applied Magnetics Corporation Anamorphic achromatic prism for optical disk heads
DE4438368C3 (de) * 1994-10-27 2003-12-04 Fraunhofer Ges Forschung Anordnung zur Führung und Formung von Strahlen eines geradlinigen Laserdiodenarrays
US6028722A (en) * 1996-03-08 2000-02-22 Sdl, Inc. Optical beam reconfiguring device and optical handling system for device utilization
FR2748127B1 (fr) * 1996-04-30 1998-07-17 Thomson Csf Dispositif de mise en forme d'un faisceau plat
US6278557B1 (en) * 1999-02-24 2001-08-21 Semiconductor Laser International Corporation Method and apparatus for stacking beams
JP3607211B2 (ja) * 2001-03-13 2005-01-05 株式会社東芝 光導波路、光モジュール、光ファイバレーザ装置

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Also Published As

Publication number Publication date
WO2005096072A1 (fr) 2005-10-13
CN1934486A (zh) 2007-03-21
US20070273976A1 (en) 2007-11-29
JP2007531028A (ja) 2007-11-01
DE102004016835A1 (de) 2005-10-20

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