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WO2003009045A2 - Dispositif de deflexion d'un faisceau laser - Google Patents

Dispositif de deflexion d'un faisceau laser Download PDF

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Publication number
WO2003009045A2
WO2003009045A2 PCT/EP2002/006790 EP0206790W WO03009045A2 WO 2003009045 A2 WO2003009045 A2 WO 2003009045A2 EP 0206790 W EP0206790 W EP 0206790W WO 03009045 A2 WO03009045 A2 WO 03009045A2
Authority
WO
WIPO (PCT)
Prior art keywords
laser beam
axis
deflection
unit
deflected
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.)
Ceased
Application number
PCT/EP2002/006790
Other languages
German (de)
English (en)
Other versions
WO2003009045A3 (fr
Inventor
Michael Deyerler
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.)
Excelitas Deutschland GmbH
Original Assignee
Linos Photonics GmbH and Co KG
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 Linos Photonics GmbH and Co KG filed Critical Linos Photonics GmbH and Co KG
Publication of WO2003009045A2 publication Critical patent/WO2003009045A2/fr
Publication of WO2003009045A3 publication Critical patent/WO2003009045A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements

Definitions

  • the invention relates to a device according to the preamble of the main claim, namely a device for deflecting a laser beam extending in the radiation direction by means of a deflection unit which, based on a neutral position, is rotatably mounted about a first axis and by means of an optical unit arranged downstream thereof and which is arranged around a second axis is rotatable, the laser beam being deflected by the deflection unit as a deflected laser beam by a first angle towards the optical unit and emerging behind the latter as a deflected laser beam from the device and wherein one leg of the first angle from the deflected laser beam and the other leg from a laser beam formed during the deflection in neutral position is formed as a neutral leg.
  • a device for deflecting a laser beam is known as a so-called orthogonal scanner with a plane mirror as a deflection unit and a further plane mirror as an optical unit.
  • the bisector of the first angle is perpendicular to the first axis.
  • This known device generally carries out two superimposed movements with both mirrors, namely a rapid back and forth movement about the first and a slow linear movement about the second axis.
  • a continuous movement pattern in the linear direction for example a sinusoidal movement.
  • Other motion sequences are difficult to generate and have the disadvantage that the positioning frequency is limited to a few kilohertz (kHz) due to the inertia of the deflection units.
  • the invention has for its object to develop an above-mentioned device according to the preamble of the main claim so that on the one hand faster positioning can be realized with closed movements.
  • the laser beam behind the first deflection unit is deflected by the first angle with respect to the first axis, so that the deflected beam falls on the optical unit which rotates about its own axis, as a result of which the laser beam acts as a cone jacket with a certain opening angle , which depends on the first angle, exits the device.
  • the opening angle of the emerging laser beam in the form of the cone shell during beam deflection can be enlarged or reduced by changing the angular position of the fixed deflection unit about its first axis.
  • closed curves can advantageously run through extremely quickly and thus high positioning frequencies can be achieved.
  • closed Movements e.g. B. circular tracks
  • the positioning frequency is only limited by the pulse rate of the light source for the laser beam.
  • circles, ellipses or spirals or other circle-like movements can be achieved in the simplest way. For example, if operations are carried out on the eye, a sequence of merging points along a closed curve at a distance of 5 ⁇ m, for example, takes about 5 minutes.
  • Figure 1 shows an embodiment of the invention in a schematic side view
  • Figure 2 shows a special embodiment of the optical unit
  • the device designated overall by 5 in FIG. 1 serves to deflect a laser beam 6, which strikes in the radiation direction 7 on a first deflection unit designed as a flat mirror 8, which in its angular position 8 ′ or 8 about a first axis 9 that can be rotated perpendicularly in the plane of the drawing '' is adjustable.
  • the laser beam 6 is directed from the first deflection unit 8 as a deflected beam 10, 10 ′, 10 ′′ to the optical unit designated as a whole by 11 by a first angle p with respect to the neutral position 8 shown in FIG Center of the optical unit 11 deflected.
  • This optical unit 11 is designed as an image or beam rotator. Its axis of rotation z - the second axis - typically coincides with the laser beam 10 deflected in the neutral position of the deflection unit 8.
  • the image or beam rotator 11 is driven to rotate about the axis 10 in a direction of rotation.
  • an image plane 12 when the deflection unit 8 is set in the position 8 ′ or 8 ′′, the first angle p results, which is represented as a beam 13 emerging from the device 5 along a cone shell, that is to say in the case of a cone with the opening angle p extends.
  • This image results in the image plane 12 a circle with a radius R and a point due to the first angle p, which is rotated by the angle ⁇ due to the optical unit 11.
  • FIG. 2 An example of an image or beam rotator 11 designed as a perchan prism is shown in FIG. 2 in a schematic cross section.
  • a perchan prism, designated as a whole by 22, is arranged as an optical unit 11 in a sleeve 21 supported by a ball bearing 20.
  • the outer bearing ring 24 of the ball bearing 20 is fixed to the device and has a motor 25 with a drive disk 26 which engages on a preferably arranged external ring gear 27 of the sleeve 21 and drives it in operation in a certain direction of rotation and at a predeterminable speed.
  • any other device that acts as an image or beam rotator can also be used.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Lasers (AREA)

Abstract

L'invention concerne un dispositif de déflexion d'un faisceau laser qui est dirigé dans un sens de rayonnement, à l'aide d'une unité de déflexion qui est montée pivotante autour d'un premier axe et tourne à partir d'une position neutre, et à l'aide d'une unité optique qui est montée en aval de l'unité de déflexion et tourne autour d'un deuxième axe. Le faisceau laser est dévié par l'unité de déflexion sous forme de faisceau laser dévié d'un premier angle et vient frapper l'unité optique qu'il traverse en sortant sous forme de faisceau laser dévié. Un côté du premier angle est représenté par le faisceau laser dévié et l'autre côté neutre par un faisceau laser formé en position neutre lors de la déviation. L'invention est caractérisée en ce que l'unité optique est conçue sous forme de rotor image ou rotor faisceau et que son deuxième axe coïncide avec le côté neutre ; en ce que l'unité optique qui tourne autour du deuxième axe dans un sens de rotation, est conçue pour dévier le faisceau laser sortant le long d'une aire latérale de cône d'un certain angle d'ouverture de manière par rapport au deuxième axe et en ce que l'on peut déplacer l'unité de déflexion par rapport au premier axe pour modifier l'importance de la déviation du faisceau laser sortant du dispositif.
PCT/EP2002/006790 2001-07-12 2002-06-19 Dispositif de deflexion d'un faisceau laser Ceased WO2003009045A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10133850.3 2001-07-12
DE2001133850 DE10133850A1 (de) 2001-07-12 2001-07-12 Vorrichtung zur Ablenkung des Laserstrahls

Publications (2)

Publication Number Publication Date
WO2003009045A2 true WO2003009045A2 (fr) 2003-01-30
WO2003009045A3 WO2003009045A3 (fr) 2003-11-27

Family

ID=7691499

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/006790 Ceased WO2003009045A2 (fr) 2001-07-12 2002-06-19 Dispositif de deflexion d'un faisceau laser

Country Status (2)

Country Link
DE (1) DE10133850A1 (fr)
WO (1) WO2003009045A2 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406798A (en) * 1944-01-26 1946-09-03 Standard Telephones Cables Ltd Direction finder
US4856891A (en) * 1987-02-17 1989-08-15 Eye Research Institute Of Retina Foundation Eye fundus tracker/stabilizer
US5225924A (en) * 1989-04-07 1993-07-06 Dainippon Screen Mfg. Co., Ltd. Optical beam scanning system
JPH0560527A (ja) * 1991-08-30 1993-03-09 Ikegami Tsushinki Co Ltd 回転光学型撮像装置
GB9127241D0 (en) * 1991-12-23 1992-02-19 Crosfield Electronics Ltd Light deflecting device
US5637109A (en) * 1992-02-14 1997-06-10 Nidek Co., Ltd. Apparatus for operation on a cornea using laser-beam
AU5133093A (en) * 1992-10-01 1994-04-26 Advanced Laser Projection, Inc. Image mover
DE19605505C2 (de) * 1996-02-14 2001-02-15 Sick Ag Optische Abtastanordnung
US6072625A (en) * 1997-02-03 2000-06-06 Olympus Optical Co., Ltd. Optical microscope apparatus
DE19745280A1 (de) * 1997-10-15 1999-04-22 Daimler Chrysler Ag Verfahren zur Fein- und Mikrobearbeitung von Werkstücken mittels Laserstrahlen und Vorrichtung zur Durchführung des Verfahrens
WO1999026214A1 (fr) * 1997-11-17 1999-05-27 Thermotrex Corporation Dispositif et procede servant a detecter un danger de collision aerienne avec des fils suspendus

Also Published As

Publication number Publication date
DE10133850A1 (de) 2003-05-22
WO2003009045A3 (fr) 2003-11-27

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