DE3608242A1 - Method and apparatus for producing a laser-beam spot of adjustable size (II) - Google Patents
Method and apparatus for producing a laser-beam spot of adjustable size (II)Info
- Publication number
- DE3608242A1 DE3608242A1 DE19863608242 DE3608242A DE3608242A1 DE 3608242 A1 DE3608242 A1 DE 3608242A1 DE 19863608242 DE19863608242 DE 19863608242 DE 3608242 A DE3608242 A DE 3608242A DE 3608242 A1 DE3608242 A1 DE 3608242A1
- Authority
- DE
- Germany
- Prior art keywords
- laser
- spot
- area
- beam spot
- target light
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 claims abstract description 3
- 210000004087 cornea Anatomy 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 2
- 238000005345 coagulation Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000007631 vascular surgery Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B2018/2035—Beam shaping or redirecting; Optical components therefor
- A61B2018/20351—Scanning mechanisms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B2018/2035—Beam shaping or redirecting; Optical components therefor
- A61B2018/20351—Scanning mechanisms
- A61B2018/20355—Special scanning path or conditions, e.g. spiral, raster or providing spot overlap
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B2018/2035—Beam shaping or redirecting; Optical components therefor
- A61B2018/20351—Scanning mechanisms
- A61B2018/20359—Scanning mechanisms by movable mirrors, e.g. galvanometric
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Optics & Photonics (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Laser Surgery Devices (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Erzeugung eines Laserstrahlflecks einstellbarer Größe auf einem Objekt, insbesondere im menschlichen Auge.The invention relates to a method for production of an adjustable size laser beam spot on one Object, especially in the human eye.
Ein derartiges Verfahren ist aus der Deutschen Patentan meldung P 35 32 464.3 bekannt, zu der vorliegende Anmel dung eine Zusatzanmeldung darstellt.Such a method is from the German patent message P 35 32 464.3 known to the present application is an additional application.
Bei Bearbeitungs- bzw. Behandlungsvorgängen mit Lasern, beispielsweise bei Operationen im menschlichen Auge, stellt sich allgemein das Problem, den Laserstrahl, der je nach Art des Lasers einen bestimmten Querschnitt hat, der zu bearbeitenden bzw. zu behandelnden Fläche anzu passen. Hierzu werden insbesondere in der Medizintechnik strahlaufweitende optische Elemente in Verbindung mit Elementen, beispielsweise Varioobjektiven verwendet, die die Vergrößerung ändern. Auf diese Weise ist es beispiels weise möglich, die Strahlfleckfläche des Operationslasers auf dem Augenhintergrund zwischen bestimmten Durchmessern zu variieren. Dabei ergibt sich jedoch das Problem, daß gleichzeitig auch der Öffnungskegel des Strahls variiert wird. Wird der Öffnungskegel zu klein, so ist die Energie dichte bereits vor dem eigentlichen Operationsort so groß, daß sie Schädigungen hervorrrufen kann. Darüberhinaus ist es mit diesen bekannten Verfahren nicht möglich, weitge hend beliebige Strahlfleckflächen einzustellen, wie sie beispielsweise für Schnitte in der Cornea benötigt werden, die beispielsweise mit Excimer-Lasern ausgeführt werden können. For processing or treatment processes with lasers, for example in operations in the human eye, generally the problem arises, the laser beam, the has a certain cross-section depending on the type of laser, the area to be worked or treated fit. This is particularly true in medical technology beam expanding optical elements in connection with Elements, such as zoom lenses, are used change the magnification. In this way it is exemplary possible, the beam spot area of the surgical laser on the fundus between certain diameters to vary. However, there is the problem that at the same time the opening cone of the jet also varies becomes. If the opening cone becomes too small, the energy is density so large even before the actual operating site, that it can cause harm. Beyond that it is not possible with these known methods to set any beam spot areas as they are for example for incisions in the cornea, which are carried out, for example, with excimer lasers can.
Deshalb ist in der älteren Deutschen Patentanmeldung P 35 32 464.3, zu der die vorliegende Anmeldung eine Zusatzan meldung darstellt, vorgeschlagen worden, immer einen Laserstrahl mit einem kleinem Fokussierungsfleck und großem Öffnungskegel zu verwenden, und den gewünschten Strahlfleck beispielsweise einen länglichen Schnitt bei einer Operation in der Cornea oder ein kreisförmiges Gebiet bei einer Koagulation, mit hoher Frequenz "auszu tasten".That is why in the older German patent application P 35 32 464.3, to which the present application an add message, has always been proposed Laser beam with a small focus spot and large cone to use, and the desired one Beam spot, for example, an elongated cut an operation in the cornea or a circular one Area at high frequency coagulation " Keys".
Bei der Verwendung von Arbeitslasern, deren Licht im nicht sichtbaren Bereich des Spektrums liegt, also entweder im UV- oder Infrarot-Bereich, ist es seit längerem üblich, eine sogenannte Ziellichtquelle zu verwenden. Bei medizi nischen Operationslasern wird dabei der Strahl der Ziel lichtquelle deckungsgleich mit dem Strahl des Operations lasers geführt, so daß der Arzt vor der Operation überprü fen kann, ob der Strahl des Operationslasers auf den zu behandelnden Bereich eingestellt ist.When using working lasers, the light of which is not visible range of the spectrum, i.e. either in the UV or infrared range, it has long been common to use a so-called target light source. At medical African surgical lasers, the beam becomes the target light source congruent with the beam of the operation lasers performed so that the doctor can check before the operation fen can whether the beam of the surgical laser to the treatment area is set.
Hierbei ergibt sich jedoch das Problem, daß der Strahl der Ziellichtquelle Sensoren, beispielsweise Bildsensoren, mit denen der Fundus erfaßt wird, überstrahlt, so daß keine Einzelheiten des Fundus aufgelöst werden können.Here, however, there is a problem that the beam the target light source sensors, for example image sensors, with which the fundus is grasped, so that no details of the fund can be resolved.
Erfindungsgemäß ist nun erkannt worden, daß der der älte ren Patentanmeldung P 35 32 464.3 zu Grunde liegende allgemeine Erfindungsgedanke, eine vorgebbare Fläche mit einem auf ein kleines Gebiet fokussierten Strahl auszu tasten, auch eine Lösung dieses Problems erlaubt:According to the invention, it has now been recognized that that of the elder Ren patent application P 35 32 464.3 underlying general idea of the invention, having a definable area a beam focused on a small area feel, a solution to this problem is also allowed:
Im Gegensatz zu den bekannten Lösungen, bei denen der Ziellichtstrahl und der Arbeitslichtstrahl deckungsgleich geführt sind, wird erfindungsgemäß der Ziellichtstrahl auf einer Bahn bewegt, die den Strahlfleck des Arbeitslicht strahls umgibt. Es kann damit weiterhin überprüft werden, ob der Arbeitslichtstrahl, also beispielsweise der Strahl eines Operationslasers, auf den richtigen Fleck eingestellt ist; da der Ziellichtstrahl jedoch das zu bearbeitende bzw. zu behandelnde Gebiet umgibt, werden Strukturen dieses Gebiets nicht durch das Licht des Ziel lichtstrahls, beispielsweise eines Helium-Neon-Lasers (Anspruch 3) überstrahlt.In contrast to the known solutions, in which the Target light beam and the work light beam are congruent are guided, the aiming light beam according to the invention a path that moves the beam spot of the work light surrounds. It can still be checked with it whether the working light beam, for example the Beam from an operation laser, on the right spot is set; because the aiming light beam does that too surrounding or to be treated area Structures of this area are not by the light of the target light beam, for example a helium-neon laser (Claim 3) outshines.
Die Bahn, auf der der Ziellichtstrahl geführt ist, kann dabei beliebig der Fleckdimensionierung des Arbeitslicht strahls angepaßt werden. Wird der Arbeitslichtstrahl, beispielsweise der Strahl eines Excimer-Lasers, z.B. zu Schnitten in der Cornea eingesetzt, so kann der Ziellicht strahl das gesamte (längliche) Gebiet umgeben, auf dem der Arbeitslichtstrahl "austastend" geführt ist. Bei Koagula tionen ist es selbstverständlich möglich, den Ziellicht strahl auf einer ringförmigen Bahn zu führen, die den Strahlfleck des Arbeitslasers ringförmig umgibt (Anspruch 4).The path on which the aiming light beam is guided can any size of the work light be adjusted. If the working light beam, for example the beam of an excimer laser, e.g. to Incisions used in the cornea, so the aiming light beam surround the entire (elongated) area on which the Work light beam "blanking" is guided. At Koagula It is of course possible to use the target light to guide the beam on an annular path that the Beam spot of the working laser surrounds in a ring (claim 4).
Selbstverständlich ist das erfindungsgemäße Verfahren für beliebige Laser und beliebige zu behandelnde Objekte verwendbar, beispielsweise in der Materialbearbeitung, bei Gefäßoperationen etc. Besonders vorteilhaft ist es jedoch, das erfindungsgemäße Verfahren bei Operationen am bzw. im Auge einzusetzen, da es hier insbesondere auf die Auflö sung kleinster Strukturen in dem zu behandelnden Gebiet ankommt (Anspruch 7).Of course, the method according to the invention is for any laser and any objects to be treated usable, for example in material processing, at Vascular surgery etc. However, it is particularly advantageous the inventive method for operations on or in Use eye, as it is particularly on the resolution solution of the smallest structures in the area to be treated arrives (claim 7).
Das erfindungsgemäße Verfahren kann dabei mit auf beliebi ge Weise bewegten Austastelementen realisiert werden. Beispiele hierfür sind in der älteren Patentanmeldung P 35 32 464.3 beschrieben, so daß hierauf nicht näher eingegan gen werden muß.The method according to the invention can be based on any Moving blanking elements can be realized. Examples of this are in the older patent application P 35 32 464.3 described, so that it is not discussed in detail must be gen.
Claims (7)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863608242 DE3608242A1 (en) | 1986-03-12 | 1986-03-12 | Method and apparatus for producing a laser-beam spot of adjustable size (II) |
EP86905214A EP0236377B1 (en) | 1985-09-11 | 1986-09-11 | Device for generating a laser spot of controllable size |
US07/049,979 US4887019A (en) | 1985-09-11 | 1986-09-11 | Device for the generation of a laser beam spot of adjustable size |
DE8686905214T DE3685577D1 (en) | 1985-09-11 | 1986-09-11 | DEVICE FOR GENERATING AN ADJUSTABLE SIZE OF LASER BEAM. |
PCT/DE1986/000360 WO1987001819A2 (en) | 1985-09-11 | 1986-09-11 | Device for generating a laser spot of controllable size |
AT86905214T ATE76984T1 (en) | 1985-09-11 | 1986-09-11 | DEVICE FOR GENERATION OF A LASER BEAM SPOT OF ADJUSTABLE SIZE. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863608242 DE3608242A1 (en) | 1986-03-12 | 1986-03-12 | Method and apparatus for producing a laser-beam spot of adjustable size (II) |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3608242A1 true DE3608242A1 (en) | 1987-10-01 |
Family
ID=6296178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19863608242 Withdrawn DE3608242A1 (en) | 1985-09-11 | 1986-03-12 | Method and apparatus for producing a laser-beam spot of adjustable size (II) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3608242A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2242196C2 (en) * | 2002-10-01 | 2004-12-20 | Государственное учреждение Межотраслевой научно-технический комплекс "Микрохирургия глаза" им. акад. С.Н. Федорова | Method and device for treating the cases of false myopia |
-
1986
- 1986-03-12 DE DE19863608242 patent/DE3608242A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2242196C2 (en) * | 2002-10-01 | 2004-12-20 | Государственное учреждение Межотраслевой научно-технический комплекс "Микрохирургия глаза" им. акад. С.Н. Федорова | Method and device for treating the cases of false myopia |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8141 | Disposal/no request for examination |