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WO2005004709A2 - Device which is used to examine a patient's retina - Google Patents

Device which is used to examine a patient's retina Download PDF

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Publication number
WO2005004709A2
WO2005004709A2 PCT/FR2004/001772 FR2004001772W WO2005004709A2 WO 2005004709 A2 WO2005004709 A2 WO 2005004709A2 FR 2004001772 W FR2004001772 W FR 2004001772W WO 2005004709 A2 WO2005004709 A2 WO 2005004709A2
Authority
WO
WIPO (PCT)
Prior art keywords
eyepiece
camera
elements
tubular element
fixing
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/FR2004/001772
Other languages
French (fr)
Other versions
WO2005004709A3 (en
Inventor
Jean-Philippe Sayag
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.)
ACEP France
Original Assignee
ACEP France
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 ACEP France filed Critical ACEP France
Publication of WO2005004709A2 publication Critical patent/WO2005004709A2/en
Publication of WO2005004709A3 publication Critical patent/WO2005004709A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00Microscopes
    • G02B21/36Microscopes arranged for photographic purposes or projection purposes or digital imaging or video purposes including associated control and data processing arrangements
    • G02B21/362Mechanical details, e.g. mountings for the camera or image sensor, housings
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/0016Operational features thereof
    • A61B3/0041Operational features thereof characterised by display arrangements
    • A61B3/005Constructional features of the display
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/12Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/14Arrangements specially adapted for eye photography
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • G03B17/48Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus

Definitions

  • the present invention relates to a device for examining the eye, and in particular the retina of a patient.
  • devices of this type which consist of a mini camera coming to be fixed on the eyepiece of the observation devices of the practitioners and which, by means of intermediate electronic means, send the image captured by the camera to a video monitor.
  • the mini camera is provided with a tubular element which is fixed to this eyepiece by means of three radial screws arranged at 120 ° from one another and tightening the eyepiece.
  • the object of the present invention is to overcome these various drawbacks by proposing a device using a camera of the aforementioned type, which is equipped with almost universal fixing means making it possible to ensure rigorous centering of the optical axes of the camera and of the camera. 'observation, ensuring moreover a serious mechanical fixing of its objective on the eyepiece of the camera, avoiding damaging it.
  • the present invention thus relates to a device intended to ensure the examination of the eye, and in particular of the retina of a patient, of the type comprising a mini camera provided with means for fixing to the eyepiece of an optical instrument.
  • the fixing means consist of a tubular element, one end of which receives the camera lens and the other end of which receives the 'eyepiece of the instrument, - it comprises at least three movable longitudinal elements, able to move radially under the action of a single control member which are interposed between the eyepiece and the tubular element, so as to come in pressure against the eyepiece in the fixing position, - the mobile elements are provided with synchronization means making it possible to ensure identical radial displacement of these three elements.
  • the present invention is thus particularly advantageous in that the maintenance of the camera on the eyepiece of the optical observation device is no longer done on a single point, as it was in the state prior to the technique, but on three straight segments which ensures very mechanical immobilization of the device. Furthermore, whatever the diameter of the eyepiece of the optical instrument, the movement of the mobile elements is identical, so that the centering of the optical axis of the eyepiece with the optical axis of the camera is ensured.
  • the mobile elements may be provided with elastic return means tending to separate them radially from the eyepiece, against the action of the control member. These return means may advantageously consist of a circular spring element which bears on each of the mobile elements.
  • This spring element may consist of a metal rod housed in grooves made in the contact faces of the movable elements with the eyepiece.
  • the control member may consist of an externally threaded tube which is screwed into the tubular element and the internal end of which will be in the form of a chamfer inclined from the outside inwards diametrically and in height, and will come in contact with an end face of the movable elements whose inclination will be such that the two inclined parts will be in contact.
  • the threaded tube will protrude from the tubular element and will end in a circular control boss.
  • the electronic signal processing means will be arranged, at least in part, in a housing secured to the lens of the camera, the rear face of which will support an aiming screen.
  • FIG. 1 is a schematic view in vertical and longitudinal section of a device according to the invention. 'invention.
  • - Figure 2 is a radial sectional view of the device shown in Figure 1 along line II-II thereof.
  • - Figure 3 is a schematic view of the device according to the invention.
  • the device for securing a lens 5 of a camera 7 consists of a tubular element 9, one end of which forms a boss 11 of smaller diameter, which is hollowed out by a bore 13 capable of receiving the objective 5.
  • the tubular element 9 is hollowed out on its opposite face with a cavity 14 provided with an internal thread 15.
  • This internal thread 15 receives a ring 17 externally threaded which ends at one of its ends by a boss 19 intended to ensure its gripping, and at its other end by an internal chamfer 21 inclined in the diametrical direction from the outside towards inside and from top to bottom in the figure.
  • movable elements 23 In the bottom of the cavity 14, three movable elements 23 have been arranged which are able to move radially on the bottom of this cavity and whose opposite face 25 is inclined so that it is in abutment on the face 21 of the ring 17. These movable elements 23 are pierced with radial holes 26 inside which engage pins 27 fixed in the wall of the tubular element 9 so as to maintain and radially guide the movable elements 23 to the during their displacement.
  • the base of the mobile elements 23 is hollowed out with a notch 31 which receives a circular elastic ring 33 which exerts on these mobile elements an elastic radial return force directed towards the outside.
  • the ring 17 which is moved back is unscrewed, then moving towards the element exterior tubular 9 and, under these conditions, the elastic return ring 33 pushes the elastic elements 23 outwards, thereby releasing the eyepiece 1.
  • the lens 5 of the camera 7 is fixed on a housing 8 containing all of the elements electronics for image processing.
  • a flat aiming screen 35 in particular of the LCD type, so as to allow the practitioner to achieve a precise aiming of the operating field which he wishes photograph.
  • the camera 7 of the device according to the invention is also connected to a computer 40 via an analog to digital converter 42.
  • the computer 40 is itself connected to a server 44 by a link network 46, for example of the INTERNET type. Furthermore, in order to observe a quality image, the camera 7 is also connected by an analog video output 48 to a TV monitor 50. As shown in FIG. 1, the tubular element 9 can be pierced with a radial slot 28 by which the user can insert a correction filter 29. According to the invention, the computer 40 makes it possible to store the images taken by the camera 7, in particular of the fundus of a patient and to then communicate them by the network 46 on the server 44 where they can be kept and archived and moreover authenticated by an authorized body.
  • the invention thus enables a practitioner after having taken a hold view of the fundus of a patient to send it on the server 44 available to a ministerial officer, such as for example a bailiff, who, in the event of a later dispute, will thus be able to attest to the veracity and of the date of the photographs which will have been sent to him.
  • a ministerial officer such as for example a bailiff

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Molecular Biology (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Eye Examination Apparatus (AREA)
  • Prostheses (AREA)

Abstract

The invention relates to a device which is used to examine the eye and, in particular, the retina of a patient. The inventive device is of the type that consists of: a mini-camera (7) comprising means for fixing to the eyepiece (1) of an optical viewing device (3), and electronic signal-processing means. The invention is characterised in that: (i) the fixing means comprise a tubular element (9) having one end which receives the lens (5) of the camera (7) and another end which receives the eyepiece (1) of the instrument; (ii) the device comprises at least three mobile longitudinal elements (23) which can move radially under the action of a single control member (17) and which are disposed between the eyepiece (1) and the tubular element (17), such as to press against the eyepiece (1) in the fixed position; and (iii) the aforementioned mobile elements (23) are provided with synchronisation means which ensure that said three elements move in an identical radial manner.

Description

DISPOSITIF DESTINE A ASSURER L'EXAMEN DE LA RETINE D'UN PATIENT DEVICE FOR PROVIDING EXAMINATION OF A PATIENT'S RETAIN

La présente invention concerne un dispositif destiné à assurer l'examen de l'oeil, et 'notamment de la rétine d'un patient. On connaît des dispositifs de ce type qui sont constitués d'une mini caméra venant se fixer sur l'oculaire des appareils d'observation des praticiens et qui, par l'intermédiaire de moyens électroniques intermédiaires, envoient l'image captée par la caméra sur un moniteur vidéo. Pour assurer la fixation de la mini caméra sur l'oculaire de l'appareil d'observation, cette dernière est pourvue d'un élément tubulaire qui vient se fixer sur cet oculaire au moyen de trois vis radiales disposées à 120° les unes des autres et venant serrer l'oculaire. Un tel dispositif, s'il permet d'assurer le maintien de n'importe quel type de caméra sur n'importe quel type d'oculaire, présente néanmoins l'inconvénient de ne pas assurer un maintien mécanique fiable dans la mesure où le poids de la mini caméra et du boîtier électronique qui lui est associé repose sur les trois points de contact des vis de fixation sur l'oculaire de l'appareil. De plus, ce moyen de fixation crée, à la longue, une détérioration de l'oculaire aux niveaux des points de contact des vis avec celui-ci. Par ailleurs, pour qu'un centrage optique rigoureux de l'axe de la caméra coïncide avec l'axe optique de l'appareil, il est impératif que les trois vis de fixation soient positionnées de façon rigoureusement identique ce qui est quasiment impossible à réaliser. La présente invention a pour but de pallier ces différents inconvénients en proposant un dispositif utilisant une caméra du type précité, qui est équipée de moyens de fixation quasiment universels permettant d'assurer un centrage rigoureux des axes optiques de la caméra et de l'appareil d'observation, en assurant de plus une fixation mécanique sérieuse de son objectif sur l'oculaire de l'appareil, évitant de détériorer celui-ci. La présente invention a ainsi pour objet un dispositif destiné à assurer l'examen de l'oeil, et notamment de la rétine d'un patient, du type comportant une mini caméra pourvue de moyens de fixation sur l'oculaire d'un instrument optique d'observation, et de moyens de traitement électronique du signal, caractérisé en ce que : - les moyens de fixation sont constitués d'un élément tubulaire dont l'une des extrémités reçoit l'objectif de la caméra et l'autre extrémité reçoit l'oculaire de l' instrument, - il comprend au moins trois éléments longitudinaux mobiles, aptes à se déplacer radialement sous l'action d'un organe de commande unique qui sont interposés entre l'oculaire et l'élément tubulaire, de façon à venir en pression contre l'oculaire en position de fixation, - les éléments mobiles sont pourvus de moyens de synchronisation permettant d'assurer un déplacement radial identique de ces trois éléments. La présente invention est ainsi particulièrement intéressante en ce que le maintien de la caméra sur l'oculaire de l'appareil optique d'observation se fait non plus sur un seul point, ainsi qu'il en était dans l'état antérieur de la technique, mais sur trois segments de droite ce qui assure une immobilisation très mécanique du dispositif. Par ailleurs quelque soit le diamètre de l'oculaire de l'instrument optique, le déplacement des éléments mobiles est identique, si bien que le centrage de l'axe optique de l'oculaire avec l'axe optique de la caméra est assuré . Les éléments mobiles pourront être pourvus de moyens de rappel élastiques tendant à les écarter radialement de l'oculaire, à l' encontre de l'action de l'organe de commande. Ces moyens de rappel pourront avantageusement être constitués d'un élément ressort circulaire qui prend appui sur chacun des éléments mobiles. Cet élément ressort pourra être constitué d'un jonc métallique logé dans des rainures réalisées dans les faces de contact des éléments mobiles avec l'oculaire. L'organe de commande pourra être constitué d'un tube fileté extérieurement venant se visser dans l'élément tubulaire et dont l'extrémité interne sera en forme de chanfrein incliné de l'extérieur vers l'intérieur diamétralement et en hauteur, et viendra en contact avec une face extrême des éléments mobiles dont l'inclinaison sera telle que les deux parties inclinées seront en contact. Préférentiellement le tube fileté dépassera de l'élément tubulaire et se terminera par un bossage circulaire de commande. Préférentiellement les moyens de traitement électronique du signal seront disposés, au moins en partie, dans un boîtier solidaire de l'objectif de la caméra dont la face arrière supportera un écran de visée. La caméra pourra être reliée à un ordinateur, notamment par l'intermédiaire d'un convertisseur analogique/numérique qui pourra être connectable, via un réseau de communication, à un serveur. La caméra pourra être reliée à des moyens d'affichage vidéo tel que notamment un moniteur et/ou une imprimante vidéo. De plus l'ordinateur pourra comporter des moyens de stockage et d'archivage en mémoire des images fournies par la caméra. On décrira ci-après, à titre d'exemple non limitatif, une forme d'exécution de la présente invention, en référence au dessin annexé sur lequel : La figure 1 est une vue schématique en coupe verticale et longitudinale d'un dispositif suivant l'invention. - La figure 2 est une vue en coupe radiale du dispositif représenté sur la figure 1 suivant la ligne II- II de celle-ci. - La figure 3 est une vue schématique du dispositif suivant l'invention. On a représenté sur la figure 1 un oculaire 1 d'un instrument optique 3 du type de ceux utilisés par les praticiens pour réaliser l'étude de la rétine d'un patient. Le dispositif permettant d'assurer la fixation d'un objectif 5 d'une caméra 7 est constitué d'un élément tubulaire 9 dont une extrémité forme un bossage 11 de plus faible diamètre, qui est creusé d'un alésage 13 apte à recevoir l'objectif 5. L'élément tubulaire 9 est creusé sur sa face opposée d'une cavité 14 pourvue d'un filetage interne 15. Ce filetage interne 15 reçoit une bague 17 filetée extérieurement qui se termine à l'une de ses extrémités par un bossage 19 destiné à assurer sa préhension, et à son autre extrémité par un chanfrein intérieur 21 incliné dans le sens diamétral de l'extérieur vers l'intérieur et du haut vers le bas sur la figure. Dans le fond de la cavité 14, on a disposé trois éléments mobiles 23 qui sont en mesure de se déplacer radialement sur le fond de cette cavité et dont la face opposée 25 est inclinée de façon qu'elle soit en appui sur la face 21 de la bague 17. Ces éléments mobiles 23 sont percés de trous radiaux 26 à l'intérieur desquels s'engagent des broches 27 fixées dans la paroi de l'élément tubulaire 9 de façon à assurer le maintien et le guidage radial des éléments mobiles 23 au cours de leur déplacement. La base des éléments mobiles 23 est creusée d'une encoche 31 qui reçoit un jonc élastique circulaire 33 qui exerce sur ces éléments mobiles un effort de rappel radial élastique dirigé vers l'extérieur. Lorsque, une fois l'oculaire 1 introduit dans la bague 17 on souhaite assurer le maintien et la fixation de celui-ci, on visse la bague 17 de façon à la déplacer en direction du fond de la cavité 14 et, sous cette action, en raison des surfaces inclinées 21 et 25 de la bague 17 et des éléments mobiles 23, ceux-ci sont repoussés radialement vers l'intérieur, à l' encontre de la force de rappel élastique du jonc 33 et sont appliqués contre l'oculaire 1 avec une force de maintien dépendant du serrage que l'utilisateur applique sur le bossage 19. Lorsque l'on souhaite libérer le dispositif de prise de vue de l'oculaire 1, on dévisse la bague 17 qui recule en se déplaçant alors vers l'extérieur de l'élément tubulaire 9 et, dans ces conditions, le jonc de rappel élastique 33 repousse les éléments élastiques 23 vers l'extérieur libérant ainsi l'oculaire 1. L'objectif 5 de la caméra 7 est fixé sur un boîtier 8 contenant l'ensemble des éléments électroniques permettant de réaliser le traitement de l'image. Préférentiellement, on pourra, ainsi que représenté sur la figure 1, disposer sur le fond du boîtier 8 un écran plat de visée 35, notamment de type LCD, de façon à permettre au praticien de réaliser une visée précise du champ opératoire qu'il souhaite photographier. Ainsi que représenté sur la figure 3, la caméra 7 du dispositif suivant l'invention est également reliée à un ordinateur 40 par l'intermédiaire d'un convertisseur analogique numérique 42. L'ordinateur 40 est lui-même relié à un serveur 44 par un réseau de liaison 46 par exemple de type INTERNET. Par ailleurs, de façon à observer une image de qualité, la caméra 7 est également reliée par une sortie vidéo analogique 48 à un moniteur TV 50. Ainsi que représenté sur la figure 1 l'élément tubulaire 9 peut être percé d'une fente radiale 28 par laquelle l'utilisateur pourra insérer un filtre correcteur 29. Suivant l'invention, l'ordinateur 40 permet de réaliser un stockage des images prises par la caméra 7, notamment des fonds d'oeil d'un patient et de les communiquer ensuite par le réseau 46 sur le serveur 44 où elles pourront être conservées et archivées et de plus authentifiées par un organisme habilité. L'invention permet ainsi à un praticien après avoir réalisé une prise de vue du fond d'oeil d'un patient d'envoyer celle-ci sur le serveur 44 à disposition chez un officier ministériel, tel que par exemple un huissier, qui, en cas de contestation ultérieure, pourra ainsi attester de la véracité et de la date des photographies qui lui auront été adressées. The present invention relates to a device for examining the eye, and in particular the retina of a patient. There are known devices of this type which consist of a mini camera coming to be fixed on the eyepiece of the observation devices of the practitioners and which, by means of intermediate electronic means, send the image captured by the camera to a video monitor. To ensure the attachment of the mini camera to the eyepiece of the observation device, the latter is provided with a tubular element which is fixed to this eyepiece by means of three radial screws arranged at 120 ° from one another and tightening the eyepiece. Such a device, if it makes it possible to ensure the maintenance of any type of camera on any type of eyepiece, nevertheless has the drawback of not ensuring reliable mechanical support insofar as the weight of the mini camera and the associated electronic unit rests on the three contact points of the fixing screws on the eyepiece of the device. In addition, this fixing means creates, in the long run, a deterioration of the eyepiece at the points of contact of the screws with it. Furthermore, for a rigorous optical centering of the axis of the camera to coincide with the optical axis of the device, it is imperative that the three fixing screws are positioned in a strictly identical manner, which is almost impossible to achieve. . The object of the present invention is to overcome these various drawbacks by proposing a device using a camera of the aforementioned type, which is equipped with almost universal fixing means making it possible to ensure rigorous centering of the optical axes of the camera and of the camera. 'observation, ensuring moreover a serious mechanical fixing of its objective on the eyepiece of the camera, avoiding damaging it. The present invention thus relates to a device intended to ensure the examination of the eye, and in particular of the retina of a patient, of the type comprising a mini camera provided with means for fixing to the eyepiece of an optical instrument. observation, and electronic signal processing means, characterized in that: - the fixing means consist of a tubular element, one end of which receives the camera lens and the other end of which receives the 'eyepiece of the instrument, - it comprises at least three movable longitudinal elements, able to move radially under the action of a single control member which are interposed between the eyepiece and the tubular element, so as to come in pressure against the eyepiece in the fixing position, - the mobile elements are provided with synchronization means making it possible to ensure identical radial displacement of these three elements. The present invention is thus particularly advantageous in that the maintenance of the camera on the eyepiece of the optical observation device is no longer done on a single point, as it was in the state prior to the technique, but on three straight segments which ensures very mechanical immobilization of the device. Furthermore, whatever the diameter of the eyepiece of the optical instrument, the movement of the mobile elements is identical, so that the centering of the optical axis of the eyepiece with the optical axis of the camera is ensured. The mobile elements may be provided with elastic return means tending to separate them radially from the eyepiece, against the action of the control member. These return means may advantageously consist of a circular spring element which bears on each of the mobile elements. This spring element may consist of a metal rod housed in grooves made in the contact faces of the movable elements with the eyepiece. The control member may consist of an externally threaded tube which is screwed into the tubular element and the internal end of which will be in the form of a chamfer inclined from the outside inwards diametrically and in height, and will come in contact with an end face of the movable elements whose inclination will be such that the two inclined parts will be in contact. Preferably, the threaded tube will protrude from the tubular element and will end in a circular control boss. Preferably, the electronic signal processing means will be arranged, at least in part, in a housing secured to the lens of the camera, the rear face of which will support an aiming screen. The camera can be connected to a computer, in particular by means of an analog / digital converter which can be connectable, via a communication network, to a server. The camera may be connected to video display means such as in particular a video monitor and / or printer. In addition, the computer may include means for storing and archiving in memory the images supplied by the camera. An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the attached drawing in which: FIG. 1 is a schematic view in vertical and longitudinal section of a device according to the invention. 'invention. - Figure 2 is a radial sectional view of the device shown in Figure 1 along line II-II thereof. - Figure 3 is a schematic view of the device according to the invention. FIG. 1 shows an eyepiece 1 of an optical instrument 3 of the type used by practitioners to carry out the study of a patient's retina. The device for securing a lens 5 of a camera 7 consists of a tubular element 9, one end of which forms a boss 11 of smaller diameter, which is hollowed out by a bore 13 capable of receiving the objective 5. The tubular element 9 is hollowed out on its opposite face with a cavity 14 provided with an internal thread 15. This internal thread 15 receives a ring 17 externally threaded which ends at one of its ends by a boss 19 intended to ensure its gripping, and at its other end by an internal chamfer 21 inclined in the diametrical direction from the outside towards inside and from top to bottom in the figure. In the bottom of the cavity 14, three movable elements 23 have been arranged which are able to move radially on the bottom of this cavity and whose opposite face 25 is inclined so that it is in abutment on the face 21 of the ring 17. These movable elements 23 are pierced with radial holes 26 inside which engage pins 27 fixed in the wall of the tubular element 9 so as to maintain and radially guide the movable elements 23 to the during their displacement. The base of the mobile elements 23 is hollowed out with a notch 31 which receives a circular elastic ring 33 which exerts on these mobile elements an elastic radial return force directed towards the outside. When, once the eyepiece 1 has been inserted into the ring 17, it is desired to maintain and fix it, the ring 17 is screwed so as to move it in the direction of the bottom of the cavity 14 and, under this action, due to the inclined surfaces 21 and 25 of the ring 17 and the movable elements 23, these are pushed radially inwards, against the elastic restoring force of the rod 33 and are applied against the eyepiece 1 with a holding force dependent on the tightening that the user applies to the boss 19. When it is desired to release the device for taking the view from the eyepiece 1, the ring 17 which is moved back is unscrewed, then moving towards the element exterior tubular 9 and, under these conditions, the elastic return ring 33 pushes the elastic elements 23 outwards, thereby releasing the eyepiece 1. The lens 5 of the camera 7 is fixed on a housing 8 containing all of the elements electronics for image processing. Preferably, it will be possible, as shown in FIG. 1, to have on the bottom of the housing 8 a flat aiming screen 35, in particular of the LCD type, so as to allow the practitioner to achieve a precise aiming of the operating field which he wishes photograph. As shown in FIG. 3, the camera 7 of the device according to the invention is also connected to a computer 40 via an analog to digital converter 42. The computer 40 is itself connected to a server 44 by a link network 46, for example of the INTERNET type. Furthermore, in order to observe a quality image, the camera 7 is also connected by an analog video output 48 to a TV monitor 50. As shown in FIG. 1, the tubular element 9 can be pierced with a radial slot 28 by which the user can insert a correction filter 29. According to the invention, the computer 40 makes it possible to store the images taken by the camera 7, in particular of the fundus of a patient and to then communicate them by the network 46 on the server 44 where they can be kept and archived and moreover authenticated by an authorized body. The invention thus enables a practitioner after having taken a hold view of the fundus of a patient to send it on the server 44 available to a ministerial officer, such as for example a bailiff, who, in the event of a later dispute, will thus be able to attest to the veracity and of the date of the photographs which will have been sent to him.

Claims

REVENDICATIONS 1.- Dispositif destiné à assurer l'examen de l'oeil, et notamment de la rétine d'un patient, du type comportant une mini caméra (7) pourvue de moyens de fixation sur l'oculaire (1) d'un instrument optique d'observation (3), et de moyens de traitement électronique du signal, caractérisé en ce que : - les moyens de fixation sont constitués d'un élément tubulaire (9) dont l'une des extrémités reçoit l'objectif1.- Device intended to ensure the examination of the eye, and in particular of the retina of a patient, of the type comprising a mini camera (7) provided with means for fixing to the eyepiece (1) of an instrument observation optics (3), and electronic signal processing means, characterized in that: - the fixing means consist of a tubular element (9) one end of which receives the objective (5) de la caméra (7) et l'autre extrémité reçoit l'oculaire (1) de l'instrument, - il comprend au moins trois éléments longitudinaux mobiles (23) , aptes à se déplacer radialement sous l'action d'un organe de commande unique (17) qui sont interposés entre l'oculaire (1) et l'élément tubulaire (17), de façon à venir en pression contre l'oculaire (1) en position de fixation, - les éléments mobiles (23) sont pourvus de moyens de synchronisation permettant d'assurer un déplacement radial identique de ces trois éléments. (5) of the camera (7) and the other end receives the eyepiece (1) of the instrument, - it comprises at least three mobile longitudinal elements (23), able to move radially under the action of a single control member (17) which are interposed between the eyepiece (1) and the tubular element (17), so as to come into pressure against the eyepiece (1) in the fixing position, - the mobile elements ( 23) are provided with synchronization means making it possible to ensure identical radial displacement of these three elements. 2.- Dispositif suivant la revendication 1, caractérisé en ce que les éléments mobiles (23) sont pourvus de moyens de rappel élastiques (33) tendant à les écarter radialement de l'oculaire (1), à l'encontre de l'organe de commande (17). 2.- Device according to claim 1, characterized in that the mobile elements (23) are provided with elastic return means (33) tending to separate them radially from the eyepiece (1), against the member control (17). 3.- Dispositif suivant l'une des revendications 1 ou 2, caractérisé en ce que les moyens de rappel sont constitués d'un élément ressort circulaire (33) qui prend appui sur chacun des éléments mobiles (23) . 3.- Device according to one of claims 1 or 2, characterized in that the return means consist of a circular spring element (33) which is supported on each of the movable elements (23). 4.- Dispositif suivant la revendication 3, caractérisé en ce que l'élément ressort est constitué d'un jonc métallique (33) logé dans des rainures (31) réalisées dans les faces de contact des éléments mobiles (23) avec 1' oculaire (1) . 4.- Device according to claim 3, characterized in that the spring element consists of a metal rod (33) housed in grooves (31) formed in the contact faces of the movable elements (23) with one eyepiece (1). 5.- Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'organe de commande est constitué d'un tube (17) fileté extérieurement qui vient se visser dans l'élément tubulaire (9) et dont l'extrémité interne est en forme de chanfrein (21) incliné de l'extérieur vers l'intérieur dans le sens diamétral et en hauteur et qui vient en contact avec une face extrême (25) des éléments mobiles (23) dont l'inclinaison ( ) est telle que les deux parties inclinées sont en contact. 5.- Device according to any one of the preceding claims, characterized in that the control member consists of a tube (17) externally threaded which is screwed into the tubular element (9) and whose end internal is in the form of a chamfer (21) inclined from the outside towards the inside in the diametral direction and in height and which comes into contact with an end face (25) of the mobile elements (23) whose inclination () is such that the two inclined parts are in contact. 6.- Dispositif suivant la revendication 5, caractérisé en ce que le tube fileté (17) dépasse de l'élément tubulaire (9) et se termine par un bossage circulaire de commande (19) . 1 . - Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de traitement électronique du signal sont disposés au moins en partie, dans un boîtier (8) solidaire de l'objectif (5) de la caméra. 8.- Dispositif suivant la revendication 7 caractérisé en ce que la face arrière du boîtier (8) supporte un écran plat de visée (35) . 9.- Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que la caméra (7) est reliée à un ordinateur (40), notamment par 1' intermédiaire d'un convertisseur analogique/numérique (42). 10.- Dispositif suivant la revendication 9, caractérisé en ce que l'ordinateur (40) est connectable, via un réseau de communication (46), à un serveur (44). 11.- Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que la caméra (7) est reliée à des moyens d'affichage vidéo tel que notamment un moniteur (50) et/ou une imprimante vidéo. 12.- Dispositif selon les revendications 9 à 11 caractérisé en ce que l'ordinateur (40) comporte des moyens de stockage et d'archivage en mémoire des images fournies par la caméra (7) . 6.- Device according to claim 5, characterized in that the threaded tube (17) protrudes from the tubular element (9) and ends with a circular control boss (19). 1. - Device according to any one of the preceding claims, characterized in that the electronic signal processing means are arranged at least in part, in a housing (8) secured to the lens (5) of the camera. 8.- Device according to claim 7 characterized in that the rear face of the housing (8) supports a flat sighting screen (35). 9.- Device according to any one of the preceding claims, characterized in that the camera (7) is connected to a computer (40), in particular by 1 'through an analog / digital converter (42). 10.- Device according to claim 9, characterized in that the computer (40) is connectable, via a communication network (46), to a server (44). 11.- Device according to any one of the preceding claims, characterized in that the camera (7) is connected to video display means such as in particular a monitor (50) and / or a video printer. 12.- Device according to claims 9 to 11 characterized in that the computer (40) comprises means for storing and archiving in memory of the images supplied by the camera (7).
PCT/FR2004/001772 2003-07-07 2004-07-07 Device which is used to examine a patient's retina Ceased WO2005004709A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR03/08287 2003-07-07
FR0308287A FR2857248B1 (en) 2003-07-07 2003-07-07 DEVICE FOR ENSURING THE EXAMINATION OF THE RETINA OF A PATIENT

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Publication Number Publication Date
WO2005004709A2 true WO2005004709A2 (en) 2005-01-20
WO2005004709A3 WO2005004709A3 (en) 2005-04-07

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FR (1) FR2857248B1 (en)
WO (1) WO2005004709A2 (en)

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CN113729619A (en) * 2021-09-24 2021-12-03 北京鹰瞳科技发展股份有限公司 Portable fundus camera and method of locking/unlocking the same

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DE102009038659A1 (en) * 2009-08-24 2011-03-10 Carl Zeiss Microlmaging Gmbh Device for taking a microscope picture
CN113729619A (en) * 2021-09-24 2021-12-03 北京鹰瞳科技发展股份有限公司 Portable fundus camera and method of locking/unlocking the same
CN113729619B (en) * 2021-09-24 2024-01-16 北京鹰瞳科技发展股份有限公司 Portable fundus camera and method of locking/unlocking the same

Also Published As

Publication number Publication date
WO2005004709A3 (en) 2005-04-07
FR2857248A1 (en) 2005-01-14
FR2857248B1 (en) 2006-01-27

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