EP0265462A1 - System for adjusting a light beam in an impingement plane - Google Patents

System for adjusting a light beam in an impingement plane

Info

Publication number
EP0265462A1
EP0265462A1 EP87902401A EP87902401A EP0265462A1 EP 0265462 A1 EP0265462 A1 EP 0265462A1 EP 87902401 A EP87902401 A EP 87902401A EP 87902401 A EP87902401 A EP 87902401A EP 0265462 A1 EP0265462 A1 EP 0265462A1
Authority
EP
European Patent Office
Prior art keywords
coils
light beam
mirror
tilt
magnets
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Withdrawn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
EP87902401A
Other languages
German (de)
French (fr)
Inventor
Werner Reis
Siegfried Cierlak
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.)
G Rodenstock Instrumente GmbH
Original Assignee
G Rodenstock Instrumente 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 G Rodenstock Instrumente GmbH filed Critical G Rodenstock Instrumente GmbH
Publication of EP0265462A1 publication Critical patent/EP0265462A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/0075—Apparatus for testing the eyes; Instruments for examining the eyes provided with adjusting devices, e.g. operated by control lever
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F9/00802—Methods or devices for eye surgery using laser for photoablation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F9/00821—Methods or devices for eye surgery using laser for coagulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
    • B60Q1/076—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle by electrical means including means to transmit the movements, e.g. shafts or joints
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G02B7/1821—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors for rotating or oscillating mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G02B7/1822—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors comprising means for aligning the optical axis
    • G02B7/1827—Motorised alignment
    • G02B7/1828—Motorised alignment using magnetic means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00863—Retina
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00872—Cornea

Definitions

  • the invention relates to a device for adjusting a light beam in an impact plane according to the preamble of patent claim 1.
  • Devices of this type are required, for example, in so-called laser coagulators which are used in ophthalmology.
  • laser coagulators which are used in ophthalmology.
  • Means the preamble of claim 1 is for example the so-called. "Micromanipulator” melderin the "An ⁇ according to.
  • a mirror is moved pneumatically, the processing laser beam in Rich ⁇ deflects on the eye.
  • This mirror may Example ⁇ be one of the mirrors that deflects the operation and / or the aiming beam in the device described in WO 85/00966 or in DE-GM 7 225 429.
  • the known micromanipulator is not easily over a suitable electronic system can be remote controlled and / or programmed.
  • the response times of the manipulator may be "noticeable" during the operation.
  • the manipulation process is not always silent.
  • the invention has for its object to provide a device for adjusting a light beam in an impact plane, which allows fast, accurate and electronically controllable manipulation of the beam in an impact plane.
  • a solution to this problem according to the invention is characterized by its developments in the claims.
  • the object is achieved by continuing to assume a device in which a mirror deflecting the light beam is tilted or pivoted.
  • the mirror is attached to a tilt / swivel joint which is pretensioned to a basic position by a pretensioning device and is connected to magnets.
  • the magnets are located in a magnetic field generated by current-carrying coils.
  • the tilt of the mirror and thus the displacement of the Light beam in the impact plane is quick and noiseless.
  • the system has a defined basic position, in which, for example, the laser beam of an operation laser is directed precisely at the geometric center of the field, over which the laser beam can be shifted.
  • the device is controlled, for example via an electronic control, it is possible to bring the system into any desired basic position by means of a constant current. In any case, however, an exact manipulation of the light beam in the impact plane is possible, since the prestressed tilt / swivel joint is mounted with almost no play.
  • the circuit claimed in claim 4 increases the symmetry of the device according to the invention and " further reduces the risk of the occurrence of tilting moments.
  • the mirror By reversing the currents flowing through the coils the mirror can be rotated or tilted in both directions with a symmetrical arrangement (claim 5).
  • the device according to the invention can be controlled both by hand, for example via a control stick (claim 8) and by a controller (claim 11).
  • the control enables the impact point of the light beam to be programmed or, for example, to be controlled by an image processing device.
  • the rapid reaction of the device according to the invention makes it possible to make "real time” corrections, for example during a laser shot during laser treatment on the human eye.
  • Another advantage of the device according to the invention is i Claim 12 characterized: the "purely electrical control" of the beam shift allows the connection, for example, of a log printer or a storage unit with which the manipulations of the beam can be recorded. This can be important, for example, in ophthalmology in the event of subsequent claims for recourse etc.
  • the device according to the invention is particularly suitable for manipulating a laser beam in an eye examination and treatment device.
  • the laser is an argon laser for retina treatment, a neodymium-YAG laser for cutting in anterior eye media or an excimer or 3 ⁇ m laser for keratotomy.
  • FIG. 1 a and b show two exemplary embodiments of a device according to the invention.
  • Fig. 2 shows an embodiment of a joystick.
  • FIGS. 1 a and 1 b show two exemplary embodiments which differ essentially in the design of the pretensioning device which defines the basic position.
  • the two exemplary embodiments have a tilt / swivel joint 1, to which two holders 2, of which only one is shown in the figures, for a mirror 3 are fastened.
  • a light and, in particular, a laser beam 4 runs between the two holders 2, which is deflected by the mirror 3 and whose impact location is to be manipulated in an impact plane 5, only shown schematically.
  • the tilt / swivel joint which is only shown schematically, is designed such that it has a passage channel for the laser beam.
  • the joint 3 is movable in the direction of arrows 6 and 7; the resulting mirror movements in the direction of arrows 6 'and 7' shift the beam 4 in the plane 5 in the x / y direction.
  • a coil / magnet unit is provided, which is described in more detail below.
  • the same unit is provided for moving the joint 1 in the direction of the arrow 7, but this system has been omitted for reasons of clarity in the drawing.
  • Permanent magnets 9 are fastened to the joint 1 by means of rods 8 and are located in a B field which is generated by current-carrying coils 10.
  • the coils 10 are each connected to one another in such a way that a current flow in one direction results in a force which attracts one of the permanent magnets 9 and repels the other.
  • a pretensioning device is provided which defines a basic position of the joint 1 when the coils 10 are not energized and thus of the mirror 3.
  • the prestressing device consists of two springs 11 and in the exemplary embodiment according to FIG. 1 b, there are two further permanent magnets 12 which exert a "same-directional" force on the magnets 9.
  • FIG. 2 shows an embodiment of a control stick for the manual control of the device according to the invention.
  • the control stick has an operating plate 20, a ball socket 21, which allows displacement of the operating plate in the x / y direction and a magnet 22, which is connected to the ball socket 21.
  • field plates 23 are provided, with regard to their arrangement and connection, reference is made to the figure.
  • a pair of field plates 23 is connected to a coil configuration 10 of the device according to the invention via an intermediate amplifier (not shown).
  • FIG. 1 a it is possible to use a device according to FIG. 1 a for moving the joint 1 in one direction and a device according to FIG. 1 b in the other direction.
  • a device according to FIG. 1 a for moving the joint 1 in one direction and a device according to FIG. 1 b in the other direction.
  • FIG. Sticks of a different design can be used.
  • the "translation" between the movement of the control stick and the deflection of the laser beam can be changed.
  • the coils and the permanent magnets can also be interchanged, that is to say the coils can be arranged on the joint 1 without the function of the device according to the invention being changed.
  • the device according to the invention When using the device according to the invention in a laser with a slit lamp device, for example when guiding the beam through the microscope arm, it is particularly advantageous if one of the mirrors located in the microscope arm is tilted by the device according to the invention.

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Biophysics (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Laser Surgery Devices (AREA)
  • Lasers (AREA)
  • Position Input By Displaying (AREA)

Abstract

Un système pour ajuster un faisceau lumineux dans un plan d'incidence (5) comprend un miroir (3) qui dévie le faisceau lumineux (4) et dont le basculement ou le pivotement permet l'ajustement du point d'incidence du faisceau lumineux. Le système est caractérisé en ce que le miroir (3) est fixé à une articulation (1) basculante/rotative chargée initialement par un système de précontrainte (11; 12) pour reprendre une position de base, et reliée à des aimants (9); et en ce que lesdits aimants sont situés dans un champ magnétique produit par des bobines fixes (10) parcourues par un courant, le passage de ce dernier à travers les bobines étant commandé par une unité de commande. Cela permet une manipulation rapide et précise du faisceau laser soit manuellement soit via une unité de commande électronique.A system for adjusting a light beam in an incidence plane (5) comprises a mirror (3) which deflects the light beam (4) and whose tilting or pivoting allows the point of incidence of the light beam to be adjusted. The system is characterized in that the mirror (3) is fixed to a tilting / rotating articulation (1) initially loaded by a prestressing system (11; 12) to return to a basic position, and connected to magnets (9) ; and in that said magnets are located in a magnetic field produced by fixed coils (10) traversed by a current, the passage of the latter through the coils being controlled by a control unit. This allows rapid and precise manipulation of the laser beam either manually or via an electronic control unit.

Description

Einrichtung zum Verstellen eines Lichtstrahls in einer Device for adjusting a light beam in a
AuftreffebeneImpact level
B e s c h r e i b u n gDescription
Technisches GebietTechnical field
Die Erfindung bezieht sich auf eine Einrichtung zum Ver¬ stellen eines Lichtstrahls in einer Auftreffebene gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for adjusting a light beam in an impact plane according to the preamble of patent claim 1.
Stand der TechnikState of the art
Derartige Einrichtungen werden beispielsweise in sog. Laserkoagulatoren benötigt, die in der Ophthalmologie Verwendung finden. Darüberhinaus gibt es selbstverständ¬ lich eine Vielzahl weiterer Anwendungsmöglichkeiten auf den verschiedensten Gebieten der Technik für derartige Einrichtungen, beispielsweise in der Laser-Schweißtechnik.Devices of this type are required, for example, in so-called laser coagulators which are used in ophthalmology. In addition, there are of course a large number of further possible uses in the most varied fields of technology for such devices, for example in laser welding technology.
Eine Einrichtung gemäß dem Oberbegriff des Patentanspruchs 1 ist beispielsweise der sog. "Mikromanipulator" der "An¬ melderin. Bei dieser bekannten Einrichtung wird pneuma¬ tisch ein Spiegel verstellt, der den Laserstrahl in Rich¬ tung auf das Auge umlenkt. Dieser Spiegel kann beispiels¬ weise einer der Spiegel sein, die den Operations- und/oder den Zielstrahl bei der in der WO 85/00966 oder der in dem DE-GM 7 225 429 beschriebenen Vorrichtung umlenkt.Means the preamble of claim 1 is for example the so-called. "Micromanipulator" melderin the "An¬ according to. In this known device, a mirror is moved pneumatically, the processing laser beam in Rich¬ deflects on the eye. This mirror may Example ¬ be one of the mirrors that deflects the operation and / or the aiming beam in the device described in WO 85/00966 or in DE-GM 7 225 429.
Diese bekannte Einrichtung ist - wie erfindungsgemäß er¬ kannt worden ist - aufgrund der pneumatischen Spiegelver¬ stellung nicht in allen Einsatzfällen optimal:This known device is - as has been recognized according to the invention - not optimal in all applications due to the pneumatic mirror adjustment:
Der bekannte Mikromanipulator ist nicht ohne weiteres über ein geeignetes elektronisches System fernbedienbar und/ oder programmierbar. Die Ansprechzeiten des Manipulators sind unter Umständen beim Bedienungsvorgang "spürbar". Darüberhinaus ist der Manipulationsvorgang nicht immer geräuschlos.The known micromanipulator is not easily over a suitable electronic system can be remote controlled and / or programmed. The response times of the manipulator may be "noticeable" during the operation. In addition, the manipulation process is not always silent.
Darstellung der ErfindungPresentation of the invention
Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zum Verstellen eines Lichtstrahl in einer Auftreffebene anzugeben, die eine schnelle, genaue und elektronisch steuerbare Manipulation des Strahl in einer Auftreffebene erlaubt.The invention has for its object to provide a device for adjusting a light beam in an impact plane, which allows fast, accurate and electronically controllable manipulation of the beam in an impact plane.
Eine erfindungsgemäße Lösung dieser Aufgabe ist mit ihren Weiterbildungen in den Patentansprüchen gekennzeichnet. Überraschenderweise gelingt eine Lösung der Aufgabe da¬ durch, daß weiterhin von einer Einrichtung ausgegangen wird, bei der ein den Lichtstrahl umlenkender Spiegel gekippt bzw. geschwenkt wird. Erfindungsgemäß ist der Spiegel an einem Kipp-/Drehgelenk befestigt, das durch eine Vorspanneinrichtung auf eine Grundstellung hin vorge¬ spannt und mit Magneten verbunden ist. Die Magnete befin¬ den sich in einem von stromdurchflossenen Spulen erzeugten Magnetfeld. Durch Variation des durch die Spulen fließen¬ den Stroms und damit des erzeugten Magnetfelds ist es möglich, das Kipp-/Drehgelenk und damit den Spiegel de¬ finiert zu verkippen. Entsprechend der definierten Ver¬ kippung wird auch der Auftreffort des Lichtstrahls in der Auftreffebene definiert verschoben.A solution to this problem according to the invention is characterized by its developments in the claims. Surprisingly, the object is achieved by continuing to assume a device in which a mirror deflecting the light beam is tilted or pivoted. According to the invention, the mirror is attached to a tilt / swivel joint which is pretensioned to a basic position by a pretensioning device and is connected to magnets. The magnets are located in a magnetic field generated by current-carrying coils. By varying the current flowing through the coils and thus the magnetic field generated, it is possible to tilt the tilt / swivel joint and thus the mirror in a defined manner. In accordance with the defined tilt, the point of impact of the light beam is also shifted in a defined manner in the plane of impact.
Die erfindungsgemäße Einrichtung hat damit eine Reihe von Vorteilen:The device according to the invention thus has a number of advantages:
Die Verkippung des Spiegels und damit die Verschiebung des Lichtstrahls in der Auftreffebene erfolgt schnell und geräuschlos. Das System hat eine definierte Grundstellung, in der beispielsweise der Laserstrahl eines Operationsla¬ sers genau auf die geometrische Mitte des Feldes gerichtet ist, über das der Laserstrahl verschoben werden kann. Andererseits ist es bei einer Steuerung der Einrichtung beispielsweise über eine elektronische Steuerung möglich, das System durch einen Konstantstrom in jede beliebige Grundstellung zu überführen. In jedem Falle ist jedoch eine genaue Manipulation des Lichtstrahls in der Auf¬ treffebene möglich, da das vorgespannte Kipp-/Drehgelenk nahezu spielfrei gelagert ist.The tilt of the mirror and thus the displacement of the Light beam in the impact plane is quick and noiseless. The system has a defined basic position, in which, for example, the laser beam of an operation laser is directed precisely at the geometric center of the field, over which the laser beam can be shifted. On the other hand, when the device is controlled, for example via an electronic control, it is possible to bring the system into any desired basic position by means of a constant current. In any case, however, an exact manipulation of the light beam in the impact plane is possible, since the prestressed tilt / swivel joint is mounted with almost no play.
Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet:Further developments of the invention are characterized in the subclaims:
Die im Anspruch 2 gekennzeichnete Ausbildung, bei der der Spiegel um zwei aufeinander senkrecht stehende Achsen kipp- bzw. schwenkbar ist, und die Verdrehung des Spiegels um jede dieser Achsen durch eine eigene Spulen/ Magnetein¬ heit erfolgt, ermöglicht am einfachsten eine x/y-Verstel- lung des Auftreffort des Lichtstrahls in der Auftreff¬ ebene.The design characterized in claim 2, in which the mirror can be tilted or pivoted about two mutually perpendicular axes, and the rotation of the mirror about each of these axes is carried out by a separate coil / magnet unit, allows the easiest x / y -Adjustment of the point of impact of the light beam in the impact plane.
Durch die "drehsymmetrische" Ausbildung der erfindungsge¬ mäßen Einrichtung gemäß Anspruch 3 werden Kippmomente, durch die die Genauigkeit der Einstellung reduziert werden könnte, wirksam vermieden.Due to the "rotationally symmetrical" design of the device according to the invention, tilting moments by which the accuracy of the setting could be reduced are effectively avoided.
Die im Anspruch 4 beanspruchte Schaltung erhöht die Sym¬ metrie der erfindungsgemäßen Einrichtung und" verringert damit die Gefahr des Auftretens von Kippmomenten weiter.The circuit claimed in claim 4 increases the symmetry of the device according to the invention and " further reduces the risk of the occurrence of tilting moments.
Durch die Umkehrung der durch die Spulen fließenden Ströme kann der Spiegel auch bei einer symmetrischen Anordnung in beide Richtungen gedreht bzw. gekippt werden (Anspruch 5) .By reversing the currents flowing through the coils the mirror can be rotated or tilted in both directions with a symmetrical arrangement (claim 5).
In den Ansprüchen 6 und 7 sind verschiedene Möglichkeiten für die Vorspanneinrichtung gekennzeichnet, die die Ein¬ richtung auf ihre Grundstellung hin vorspannt.In claims 6 and 7 different possibilities for the pretensioning device are characterized, which pretensions the device towards its basic position.
Die erfindungsgemäße Einrichtung kann sowohl von Hand, beispielsweise über einen Steuerknüppel (Anspruch 8) als auch von einer Steuerung (Anspruch 11) gesteuert werden.The device according to the invention can be controlled both by hand, for example via a control stick (claim 8) and by a controller (claim 11).
Die Steuerung ermöglicht es, den Auftreffort des Licht¬ strahls programmiert oder beispielsweise von einer Bild¬ verarbeitungseinrichtung gesteuert zu verschieben. Die schnelle Reaktion der erfindungsgemäßen Einrichtung er¬ laubt es dabei, in "Echtzeit" Korrekturen beispielsweise während eines LaserSchusses bei einer Laserbehandlung am menschlichen Auge vorzunehmen.The control enables the impact point of the light beam to be programmed or, for example, to be controlled by an image processing device. The rapid reaction of the device according to the invention makes it possible to make "real time" corrections, for example during a laser shot during laser treatment on the human eye.
Natürlich ist auch eine leichte Fernbedienung möglich. Darüberhinaus erlaubt die rein elektrische Bedienung und Steuerung der erfindungsgemäßen Einrichtung beispielsweise eine elektronische "Übersetzung" der Bewegungen des Steuerknüppels (Anspruch 9) .Of course, a light remote control is also possible. In addition, the purely electrical operation and control of the device according to the invention allows, for example, electronic "translation" of the movements of the control stick (claim 9).
Im Anspruch 10 ist eine vorteilhafte Ausbildung eines Steuerknüppels beschrieben. Selbstverständlich sind aber auch andere Ausbildungen, wie sie beispielsweise bei sog. "Joy-Sticks" verwendet werden, möglich, solange sie nur die Umsetzung einer Verschiebung bzw. einer Bewegung des Knüppels in einer Ebene in "AnsteuerSignale" für die Spu¬ len erlauben.In claim 10, an advantageous embodiment of a joystick is described. Of course, however, other designs, such as those used in so-called "joy sticks", are also possible, as long as they only allow the translation or movement of the stick in one plane into "control signals" for the spools.
Ein weiterer Vorteil der erfindungsgemäßen Einrichtung ist i Anspruch 12 gekennzeichnet: die "rein elektrische Steuerung" der StrahlVerschiebung erlaubt in einfacher Weise den Anschluß beispielsweise eines Protokolldruckers oder einer Speichereinheit, mit der die Manipulationen des Strahls aufgezeichnet werden können. Dies kann beispiels¬ weise in der Ophthalmologie bei späteren Regreßanspruchen etc von Bedeutung sein.Another advantage of the device according to the invention is i Claim 12 characterized: the "purely electrical control" of the beam shift allows the connection, for example, of a log printer or a storage unit with which the manipulations of the beam can be recorded. This can be important, for example, in ophthalmology in the event of subsequent claims for recourse etc.
In jedem Falle eignet sich die erfindungsgemäße Einrich¬ tung im besonderen Maße für die Manipulation eines Laser¬ strahls in einem Augenuntersuchungs- und Behandlungsgerät. Für die Funktionsweise der erfindungsgemäßen Einrichtung ist es gleichgültig, ob der Laser ein Argonlaser für die Retinabehandlung, ein Neodym-YAG-Laser zum Schneiden in vorderen Augenmedien oder ein Excimer- oder 3<m-Laser für die Keratotomie ist.In any case, the device according to the invention is particularly suitable for manipulating a laser beam in an eye examination and treatment device. For the functioning of the device according to the invention, it does not matter whether the laser is an argon laser for retina treatment, a neodymium-YAG laser for cutting in anterior eye media or an excimer or 3 <m laser for keratotomy.
Kurze Beschreibung der -ZeichnungBrief description of the drawing
Die Erfindung wird nachstehend anhand von Ausführungsbei- spielen in Verbindung mit der Zeichnung näher beschrieben, auf die im übrigen für die Offenbarung aller nicht im Text beschriebenen Einzelheiten ausdrücklich Bezug genommen wird. Es zeigen:The invention is described in more detail below on the basis of exemplary embodiments in conjunction with the drawing, to which reference is expressly made for the disclosure of all details not described in the text. Show it:
Fig. 1 a und b zwei Ausführungsbeispiele einer erfindungs¬ gemäßen Einrichtung, und1 a and b show two exemplary embodiments of a device according to the invention, and
Fig. 2 ein Ausführungsbeispiel eines Steuerknüppels.Fig. 2 shows an embodiment of a joystick.
Darstellung eins AusführungsbeispielsRepresentation of an embodiment
Die Fig. la und lb zeigen zwei Ausführungsbeispiele, die sich im wesentlichen in der Ausbildung der Vorspannein¬ richtung unterscheiden, die die Grundstellung definiert. Übereinstimmend weisen die beiden Ausführungsbeispiele ein Kipp-/Drehgelenk 1 auf, an dem zwei Halter 2, von denen in den Figuren nur einer dargestellt ist, für einen Spiegel 3 befestigt sind. Zwischen den beiden Haltern 2 verläuft ein Licht- und insbesondere ein Laserstrahl 4, der von dem Spiegel 3 umgelenkt wird und dessen Auftreffort in einer nur schematisch dargestellten Auftreffebene 5 manipuliert werden soll. Das nur schematisch dargestellte Kipp-/Dreh- gelenk ist hierzu so ausgebildet, daß es einen Durchla߬ kanal für den Laserstrahl aufweist.FIGS. 1 a and 1 b show two exemplary embodiments which differ essentially in the design of the pretensioning device which defines the basic position. Correspondingly, the two exemplary embodiments have a tilt / swivel joint 1, to which two holders 2, of which only one is shown in the figures, for a mirror 3 are fastened. A light and, in particular, a laser beam 4 runs between the two holders 2, which is deflected by the mirror 3 and whose impact location is to be manipulated in an impact plane 5, only shown schematically. For this purpose, the tilt / swivel joint, which is only shown schematically, is designed such that it has a passage channel for the laser beam.
Das Gelenk 3 ist in Richtung der Pfeile 6 und 7 beweglich; durch die resultierenden Spiegelbewegungen in Richtung der Pfeile 6' und 7' wird der Strahl 4 in der Ebene 5 in x/y- Richtung verschoben.The joint 3 is movable in the direction of arrows 6 and 7; the resulting mirror movements in the direction of arrows 6 'and 7' shift the beam 4 in the plane 5 in the x / y direction.
Zum Bewegen des Kipp-/Drehgelenks 1 in Richtung des Pfeils 6 ist eine Spulen/Magnet-Einheit vorgesehen, die im fol¬ genden näher beschrieben wird. Eine gleiche Einheit ist zum Bewegen des Gelenks 1 in Richtung des Pfeils 7 vorge¬ sehen, dieses System ist jedoch aus Gründen der zeichneri¬ schen Übersichtlichkeit weggelassen.To move the tilt / swivel joint 1 in the direction of arrow 6, a coil / magnet unit is provided, which is described in more detail below. The same unit is provided for moving the joint 1 in the direction of the arrow 7, but this system has been omitted for reasons of clarity in the drawing.
An dem Gelenk 1 sind mittels Stäben 8 Permanentmagnete 9 befestigt, die sich in einem B-Feld befinden, das von stromdurchflossenen Spulen 10 erzeugt wird. Die Spulen 10 sind jeweils so miteinander verbunden, daß ein Stromfluß in der einen Richtung eine resultierende Kraft ergibt, die die den einen der Permanentmagnete 9 anzieht und den an¬ deren abstößt. Durch Steuern des Stromflußes und der Stromrichtung kann damit eine definierte Bewegung des Gelenks 1 und damit eine definerte Schwenkung des Spiegels 3 hervorgerufen werden. Ferner ist eine Vorspanneinrichtung vorgesehen, die eine Grundstellung des Gelenks 1 bei nicht erregten Spulen 10 und damit des Spiegels 3 definieren. Bei dem in Fig. la gezeigten Ausführungsbeispiel besteht die Vorspanneinrich¬ tung aus zwei Federn 11 und bei dem Ausführungsbeispiel gemäß Fig. lb aus zwei weiteren Permanentmagneten 12, die eine "gleichsinnige" Kraft auf die Magnete 9 ausüben.Permanent magnets 9 are fastened to the joint 1 by means of rods 8 and are located in a B field which is generated by current-carrying coils 10. The coils 10 are each connected to one another in such a way that a current flow in one direction results in a force which attracts one of the permanent magnets 9 and repels the other. By controlling the current flow and the current direction, a defined movement of the joint 1 and thus a defined pivoting of the mirror 3 can thus be brought about. Furthermore, a pretensioning device is provided which defines a basic position of the joint 1 when the coils 10 are not energized and thus of the mirror 3. In the exemplary embodiment shown in FIG. 1 a, the prestressing device consists of two springs 11 and in the exemplary embodiment according to FIG. 1 b, there are two further permanent magnets 12 which exert a "same-directional" force on the magnets 9.
Fig. 2 zeigt ein Ausführungsbeispiel eines Steuerknüppels für die manuelle Steuerung der erfindungsgemäßen Einrich¬ tung. Der Steuerknüppel weist einen Bedienteller 20, eine Kugelpfanne 21, die eine Verschiebung des Bedientellers in x-/y-Richtung erlaubt und einen Magnet 22 auf, der mit der Kugelpfanne 21 verbunden ist. Ferner sind Feldplatten 23 vorgesehen, bezüglich deren Anordnung und Verschaltung auf die Figur verwiesen wird. Jeweils ein Feldplatten-Paar 23 ist mit einer Spulenkonfiguration 10 der erfindungsgemäßen Einrichtung über einen nicht dargestellten Zwischenver¬ stärker verbunden. Durch eine Verschiebung des Bedientel¬ lers 20 in der x-/y-Ebene und die hieraus resultierende Verschiebung des Magneten ändert sich der durch die Feld¬ platten und damit durch die Spulen 9 fließende Strom pro¬ portional der Verschiebung. Entsprechend wird dann der Spiegel zur Manipulation des Strahls verkippt.2 shows an embodiment of a control stick for the manual control of the device according to the invention. The control stick has an operating plate 20, a ball socket 21, which allows displacement of the operating plate in the x / y direction and a magnet 22, which is connected to the ball socket 21. Furthermore, field plates 23 are provided, with regard to their arrangement and connection, reference is made to the figure. A pair of field plates 23 is connected to a coil configuration 10 of the device according to the invention via an intermediate amplifier (not shown). By shifting the operator 20 in the x / y plane and the resulting shift of the magnet, the current flowing through the field plates and thus through the coils 9 changes proportionally to the shift. The mirror is then tilted accordingly for manipulating the beam.
Vorstehend ist die Erfindung anhand von Ausführungsbei- spielen ohne Beschränkung des allgemeinen Erfindungsgedan¬ kens beschrieben worden, wie er in den Ansprüchen nieder¬ gelegt ist.The invention has been described above on the basis of exemplary embodiments without restricting the general inventive concept as set forth in the claims.
Beispielsweise ist es möglich, zum Bewegen des Gelenks 1 in einer Richtung eine Einrichtung gemäß Fig. la und in der anderen Richtung eine Einrichtung gemäß Fig. lb zu verwenden. Anstelle des in Fig. 2 dargestellten Steuer- knüppels können anders aufgebaute Steuerknüppel Verwendung finden. Auch ist es möglich, anstelle einer manuellen Steuerung eine Programmsteuerung oder eine selbsttätige Steuerung beispielsweise durch eine Bildverarbeitungsein¬ richtung zu verwenden.For example, it is possible to use a device according to FIG. 1 a for moving the joint 1 in one direction and a device according to FIG. 1 b in the other direction. Instead of the control shown in FIG. Sticks of a different design can be used. It is also possible to use a program control or an automatic control instead of a manual control, for example by means of an image processing device.
Ferner kann bei einer manuellen Steuerung beispielsweise durch Ändern des Verstärkungsfaktors des Zwischenverstär¬ kers die "Übersetzung" zwischen Bewegung des Steuerknüp¬ pels und Auslenkung des Laserstrahls geändert werden.Furthermore, in a manual control, for example by changing the amplification factor of the intermediate amplifier, the "translation" between the movement of the control stick and the deflection of the laser beam can be changed.
Auch können gegebenenfalls die Spulen und die Permanent¬ magnete vertauscht werden, also die Spulen an dem Gelenk 1 angeordnet werden, ohne daß die Funktion der erfindungs¬ gemäßen Einrichtung geändert würde.If necessary, the coils and the permanent magnets can also be interchanged, that is to say the coils can be arranged on the joint 1 without the function of the device according to the invention being changed.
Bei Verwendung der erfindungsgemäßen Einrichtung in einem Laser mit Spaltlampengerät ist es beispielsweise bei einer Führung des Strahls durch den Mikroskoparm besonders vor¬ teilhaft, wenn einer der im Mikroskoparm befindlichen Spiegel von der erfindungsgemäßen Einrichtung gekippt wird. When using the device according to the invention in a laser with a slit lamp device, for example when guiding the beam through the microscope arm, it is particularly advantageous if one of the mirrors located in the microscope arm is tilted by the device according to the invention.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Einrichtung zum Verstellen eines Lichtstrahls in einer Auftreffebene (5) mit einem den Lichtstrahl (4) umlenken¬ den Spiegel (3) , durch dessen Verkippung bzw. Verschwen- kung der Auftreffort des Lichtstrahls verstellbar ist, gekennzeichnet durch folgende Merkmale:1. Device for adjusting a light beam in an impact plane (5) with a mirror (3) deflecting the light beam (4), by tilting or pivoting the point of impact of the light beam being adjustable, characterized by the following features:
-der Spiegel (3) ist an einem Kipp-/Drehgelenk (1) be¬ festigt,the mirror (3) is fastened to a tilt / swivel joint (1),
-das Kipp-/Drehgelenk ist durch eine Vorspanneinrichtung (11;12) auf eine Grundstellung hin vorgespannt und mit Magneten (9) verbunden, und- The tilt / swivel joint is prestressed to a basic position by a prestressing device (11; 12) and connected to magnets (9), and
-die Magnete befinden sich in einem von ortsfesten stromdurchflossenen Spulen (10) erzeugten Magnetfeld, -eine Steuereinheit steuert den Strom durch die Spulen.the magnets are located in a magnetic field generated by fixed current-carrying coils (10), a control unit controls the current through the coils.
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zur Verdrehung bzw. Verkippung des Spiegels um zwei aufeinander senkrecht stehende Achsen für jede Bewegung getrennte am Kipp-/Drehgelenk befestigte Magnete und Spulen vorgesehen sind.2. Device according to claim 1, characterized in that for rotating or tilting the mirror about two mutually perpendicular axes for each movement separate magnets and coils are provided attached to the tilt / swivel joint.
3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß für jede Bewegung um jeweils eine Achse jeweils zwei beidseits des Kipp-/Drehgelenks im gleichen Abstand von dem Gelenk angeordnete Magnete und zwei zugeordnete Spulen vorgesehen sind.3. Device according to claim 1 or 2, characterized in that for each movement about an axis in each case two on both sides of the tilt / swivel joint arranged at the same distance from the joint and two associated coils are provided.
4. Einrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die eine Bewegung um eine Achse erzeugenden Spulen entgegengesetzt in Serie geschal¬ tet sind. 4. Device according to claim 3, characterized in that the coils generating a movement about an axis are oppositely switched in series.
5. Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Richtung der durch die Spulen fließenden Ströme umkehrbar ist.5. Device according to one of claims 1 to 4, characterized in that the direction of the currents flowing through the coils is reversible.
6. Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Federn (11) die Einrichtung auf ihre Grundstellung hin vorspannen.6. Device according to one of claims 1 to 4, characterized in that springs (11) bias the device to its basic position.
7. Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zusätzliche Permanentmagnete (12) die Einrichtung auf ihre Grundstellung hin vorspan¬ nen.7. Device according to one of claims 1 to 4, characterized in that additional permanent magnets (12) preload the device to its basic position.
8. Einrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Steuereinheit einen Steuerknüppel (Fig. 2) aufweist.8. Device according to one of claims 1 to 7, characterized in that the control unit has a joystick (Fig. 2).
9. Einrichtung nach Anspruch 8,9. Device according to claim 8,
« dadurch gekennzeichnet, daß die Übersetzung zwischen Be¬ wegung des Steuerknüppels und Verschiebung des Strahls in der Auftreffebene änderbar ist.«Characterized in that the translation between the movement of the control stick and the displacement of the beam in the incidence plane can be changed.
10. Einrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß der Steuerknüppel einen Per¬ manentmagneten (22) aufweist, der über Feldplatten (23) verschiebbar angeordnet ist, die über einen Zwischenver¬ stärker mit den Spulen (10) verbunden sind.10. Device according to claim 8 or 9, characterized in that the control stick has a permanent magnet (22) which is arranged displaceably via field plates (23) which are connected to the coils (10) via an intermediate amplifier.
11. Einrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß eine elektronische Steuerung die Einrichtung steuert. -11-11. Device according to one of claims 1 to 7, characterized in that an electronic control controls the device. -11-
12. Einrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß ein Protokolldrucker, eine Speichereinheit etc. die Bewegungen des Strahls in der Auftreffebene (5) registriert. 12. Device according to one of claims 1 to 11, characterized in that a log printer, a storage unit etc. registers the movements of the beam in the impact plane (5).
EP87902401A 1986-04-18 1987-04-18 System for adjusting a light beam in an impingement plane Withdrawn EP0265462A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863613233 DE3613233A1 (en) 1986-04-18 1986-04-18 DEVICE FOR ADJUSTING A LIGHT BEAM IN A MEETING LEVEL
DE3613233 1986-04-18

Publications (1)

Publication Number Publication Date
EP0265462A1 true EP0265462A1 (en) 1988-05-04

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EP (1) EP0265462A1 (en)
JP (1) JPH01500063A (en)
DE (1) DE3613233A1 (en)
WO (1) WO1987006358A1 (en)

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US4850687A (en) 1989-07-25
DE3613233A1 (en) 1987-10-22
JPH01500063A (en) 1989-01-12
WO1987006358A1 (en) 1987-10-22
DE3613233C2 (en) 1989-04-06

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