FR2464704A1 - Medical laser equipment for eye treatment - has prisms introducing laser beam light source and operates line of sight to front surface of patient's eye - Google Patents
Medical laser equipment for eye treatment - has prisms introducing laser beam light source and operates line of sight to front surface of patient's eye Download PDFInfo
- Publication number
- FR2464704A1 FR2464704A1 FR8019128A FR8019128A FR2464704A1 FR 2464704 A1 FR2464704 A1 FR 2464704A1 FR 8019128 A FR8019128 A FR 8019128A FR 8019128 A FR8019128 A FR 8019128A FR 2464704 A1 FR2464704 A1 FR 2464704A1
- Authority
- FR
- France
- Prior art keywords
- eye
- light source
- laser beam
- prisms
- slit
- 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.)
- Granted
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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
-
- 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
-
- 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
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/13—Ophthalmic microscopes
- A61B3/135—Slit-lamp microscopes
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Physics & Mathematics (AREA)
- Ophthalmology & Optometry (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Optics & Photonics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Electromagnetism (AREA)
- Otolaryngology (AREA)
- Biophysics (AREA)
- Eye Examination Apparatus (AREA)
- Microscoopes, Condenser (AREA)
Abstract
Description
La présente invention concerne un photocoagulateur associé à un microscope à lampe à fente et à un faisceau de lumière cohérente ou "laser" réfléchi sur le trajet des rayons éclairants et destiné à provoquer une coagulation à l'intérieur de l'oeil humain, dans lequel la lampe à fente comporte une source de lumière pour l'éclairage, un diaphragme à fente, un système optique formateur d'images disposé à peu près perpendiculairement au faisceau lumineux dirigé sur l'oeil, ainsi qu'un prisme de renvoi. The present invention relates to a photocoagulator associated with a slit lamp microscope and a coherent light beam or "laser" reflected on the path of the illuminating rays and intended to cause coagulation inside the human eye, in which the slit lamp comprises a light source for lighting, a slit diaphragm, an optical imaging system arranged approximately perpendicular to the light beam directed on the eye, as well as a deflection prism.
Par exemple, la demande de brevet DE-OS 2 611 933 décrit un photocoagulateur dans lequel la lumière émise par une source de lumière cohérente ou laser est réfléchie latéralement par un miroir sur le trajet du faisceau émis par la fente, entre le diaphragme à fente et le système optique formateur d'images. Ce miroir, qui peut être dichroïque, couvre pratiquement la totalité d'un étroit faisceau lumineux éclairant et provoque ainsi une réduction appréciable de l'intensité de l'éclairement. For example, patent application DE-OS 2 611 933 describes a photocoagulator in which the light emitted by a coherent light source or laser is reflected laterally by a mirror on the path of the beam emitted by the slit, between the slit diaphragm and the optical imaging system. This mirror, which can be dichroic, covers practically the whole of a narrow light beam illuminating and thus causes an appreciable reduction in the intensity of the illumination.
Il est par ailleurs connu ("Neditic-Laser") de diriger le faisceau laser et la lumière d'une lampe à fente par deux faces voisines d'un prisme sur l'oeil à traiter. Les intensités des deux faisceaux lumineux ne sont alors pas affaiblies, mais ils n'atteignent pas l'oeil suivant le même axe et forment entre eux un angle supérieur à 100. Cet écart angulaire s'avère gênant lorsqu'on opère avec cet appareil. It is also known ("Neditic-Laser") to direct the laser beam and the light of a slit lamp by two neighboring faces of a prism on the eye to be treated. The intensities of the two light beams are then not weakened, but they do not reach the eye along the same axis and form between them an angle greater than 100. This angular difference is inconvenient when operating with this device.
L'invention a pour objet d'associer une source lumineuse à fente à un photocoagulateur, de façon que le faisceau éclairant et le faisceau laser servant à la coagulation tombent coaxialement sur l'oeil, ces deux faisceaux n'étant pratiquement pas affaiblis et pouvant être ajustés conjointement avec précision par le réglage fin du prisme de renvoi de la lampe à fente. The object of the invention is to associate a slit light source with a photocoagulator, so that the illuminating beam and the laser beam used for coagulation fall coaxially on the eye, these two beams being practically not weakened and being able to be precisely adjusted together by fine adjustment of the slit lamp return prism.
Selon les caractéristiques essentielles de l'invention, un séparateur de faisceau est centré, par rapport au faisceau éclairant, du côté sortie du prisme de renvoi ; il ne recouvre qu'une partie de l'ouverture, dans un plan vertical, du projecteur de l'image de la fente, et dévie le faisceau laser dans le sens de l'axe optique du faisceau éclairant. Le miroir ou la couche réfléchissante du diviseur optiq#ue ou séparateur de faisceau couvre le tiers médian de ladite ouverture verticale. Le séparateur de faisceau comporte une couche réfléchissante di chronique dont les caractéristiques sont de préférence adaptées à la longueur d'onde du faisceau laser. According to the essential characteristics of the invention, a beam splitter is centered, relative to the illuminating beam, on the outlet side of the return prism; it covers only part of the opening, in a vertical plane, of the projector of the image of the slit, and deflects the laser beam in the direction of the optical axis of the illuminating beam. The mirror or the reflecting layer of the optical splitter or beam splitter covers the middle third of said vertical opening. The beam splitter has a chronic reflective layer, the characteristics of which are preferably adapted to the wavelength of the laser beam.
Cette action avantageuse provient avant tout du fait que la surface réfléchissante renvoyant le faisceau laser ne recouvre, en projectionlqu'une petite partie de l'ouverture verticale du projecteur de l'image de la fente, si bien que l'intensité de cette image n'est quasiment pas diminuée et en fait l'est seulement dans une petite zone. Une couche réfléchissante dichroïque, adaptée à la longueur d'onde du faisceau laser utilisé, élimine dans une large mesure les pertes lors de la déviation du faisceau laser. This advantageous action comes above all from the fact that the reflecting surface returning the laser beam covers, in projectionl only a small part of the vertical opening of the projector of the image of the slit, so that the intensity of this image n 'is hardly diminished and in fact is only diminished in a small area. A dichroic reflecting layer, adapted to the wavelength of the laser beam used, largely eliminates the losses during the deflection of the laser beam.
Une étude normale au microscope avec la lumière en provenance de la fente est possible en dépit de la réflexion suivant le même axe du faisceau laser. Normal study under the microscope with light from the slit is possible despite the reflection along the same axis of the laser beam.
L'invention sera décrite plus en détail en regard des dessins annexés à titre d'exemples nullement limitatifs et sur lesquels
la figure 1 est une vue de côté d'une lampe à fente associée à une source de lumière cohérente ou laser
la figure 2 représente, à une plus grande échelle, l'ensemble des prismes ; et
la figure 3 représente l'ensemble de la figure 2, vu dans la direction de la flèche Il. The invention will be described in more detail with reference to the accompanying drawings by way of non-limiting examples and in which
Figure 1 is a side view of a slit lamp associated with a coherent light source or laser
FIG. 2 represents, on a larger scale, all of the prisms; and
FIG. 3 represents the assembly of FIG. 2, seen in the direction of the arrow II.
La fiqure 1 représente un dispositif de lampe à fente 2 pivotant autour#d'un axe vertical 1, associé à un microscope d'observation 3 pivotant autour du même axe. Le dispositif 2 contient comme d'habitude, une source lumineuse 4, un condensateur 5, un diaphragme à fente 6, un système optique 7 formateur d'image ainsi qu'un prisme de renvoi 8. Figure 1 represents a slit lamp device 2 pivoting around # a vertical axis 1, associated with an observation microscope 3 pivoting around the same axis. The device 2 contains, as usual, a light source 4, a capacitor 5, a slit diaphragm 6, an optical system 7 forming an image as well as a return prism 8.
Une source 9 de lumière cohérente ou laser est fixée à la lampe et envoie son faisceau laser, par l'intermédiaire de la surface réfléchissante ou miroir 10 et coaxialement au faisceau éclairant, sur un oeil 11. Les composants formant la surface réfléchissante 10 sont fixés par collage au prisme de renvoi 8. A source 9 of coherent or laser light is fixed to the lamp and sends its laser beam, via the reflecting surface or mirror 10 and coaxially to the illuminating beam, on an eye 11. The components forming the reflecting surface 10 are fixed by bonding to the return prism 8.
La figure 2 représente, à plus grande échelle, le prisme de renvoi 8 ainsi que le système optique 7 formateur d'image. L'image de la fente est formée en 11, par l'intermédiaire du système optique 7 et du prisme 8. Le faisceau laser dirigé de haut en bas sur la surface réfléchissante 10 atteint l'oeil 31 en suivant le même axe. La surface 10 est formée par deux prismes 12 et 13 collés ensemble ainsi qu'au prisme de renvoi 8. La plaque 14 à faces planes et parallèles, qui sert à éliminer les aberrations au voisinage de l'extrémité inférieure de la surface réfléchissante 10, est également collée aux prismes 12 et 13. FIG. 2 represents, on a larger scale, the return prism 8 as well as the optical system 7 forming the image. The image of the slit is formed at 11, through the optical system 7 and the prism 8. The laser beam directed from top to bottom on the reflecting surface 10 reaches the eye 31 along the same axis. The surface 10 is formed by two prisms 12 and 13 glued together as well as to the return prism 8. The plate 14 with flat and parallel faces, which serves to eliminate aberrations in the vicinity of the lower end of the reflecting surface 10, is also glued to prisms 12 and 13.
La figure 3 représente ltensemble de la figure 2 vu dans le sens de la flèche Il, avec les mêmes numéros de référence. FIG. 3 represents the whole of FIG. 2 seen in the direction of the arrow II, with the same reference numbers.
I1 va de soi que la présente invention n'a été décrite qu 'à titre indicatif, mais non limitatif, et qu'elle est susceptible de diverses variantes, sans sortir de son cadre. It goes without saying that the present invention has only been described as an indication, but not limiting, and that it is susceptible of various variants, without departing from its scope.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19797925899 DE7925899U1 (en) | 1979-09-12 | 1979-09-12 | Light coagulator with slit lamp microscope |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2464704A1 true FR2464704A1 (en) | 1981-03-20 |
FR2464704B1 FR2464704B1 (en) | 1984-12-21 |
Family
ID=6707318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8019128A Granted FR2464704A1 (en) | 1979-09-12 | 1980-09-04 | Medical laser equipment for eye treatment - has prisms introducing laser beam light source and operates line of sight to front surface of patient's eye |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS5643926A (en) |
DE (1) | DE7925899U1 (en) |
FR (1) | FR2464704A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5002386A (en) * | 1986-03-12 | 1991-03-26 | G. Rodenstock Instrumente Gmbh | Device for directing a laser beam by means of mirror reflection in a slit lamp apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2980938B2 (en) * | 1990-04-12 | 1999-11-22 | 株式会社ニデック | Lens system for condensing semiconductor laser light |
DE19734655C2 (en) | 1997-08-11 | 2003-01-23 | Asclepion Meditec Ag | Arrangement for laser coagulation |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2611933A1 (en) * | 1976-03-20 | 1977-09-22 | Rodenstock Optik G | LIGHT COAGULATOR |
-
1979
- 1979-09-12 DE DE19797925899 patent/DE7925899U1/en not_active Expired
-
1980
- 1980-08-14 JP JP11226480A patent/JPS5643926A/en active Granted
- 1980-09-04 FR FR8019128A patent/FR2464704A1/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2611933A1 (en) * | 1976-03-20 | 1977-09-22 | Rodenstock Optik G | LIGHT COAGULATOR |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5002386A (en) * | 1986-03-12 | 1991-03-26 | G. Rodenstock Instrumente Gmbh | Device for directing a laser beam by means of mirror reflection in a slit lamp apparatus |
EP0259399B1 (en) * | 1986-03-12 | 1991-04-17 | G. Rodenstock Instrumente Gmbh | Device for reflecting a laser beam in a slit lamp unit |
Also Published As
Publication number | Publication date |
---|---|
JPH0310332B2 (en) | 1991-02-13 |
DE7925899U1 (en) | 1980-02-28 |
JPS5643926A (en) | 1981-04-22 |
FR2464704B1 (en) | 1984-12-21 |
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Legal Events
Date | Code | Title | Description |
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ST | Notification of lapse |