METHODS AND SYSTEMS FOR LASER CALIBRATION AND EYE TRACKER CAMERA ALIGNMENT

The present invention provides methods, systems, and apparatus (10) for calibrating a laser ablation system, such as an excimer laser system (11) for selectively ablating a cornea of a patient's eye. The invention also facilitates alignment of eye tracking cameras (36, 38) that measure a positi...

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Bibliographische Detailangaben
Hauptverfasser:	SOMANI, SEEMA, SHIMMICK, JOHN K, YEE, KINGMAN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS BANDAGES, DRESSINGS OR ABSORBENT PADS BASIC ELECTRIC ELEMENTS CLADDING OR PLATING BY SOLDERING OR WELDING COLORIMETRY CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DEVICES USING STIMULATED EMISSION DIAGNOSIS ELECTRICITY ELECTROTHERAPY FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE IDENTIFICATION MACHINE TOOLS MAGNETOTHERAPY MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MEDICAL OR VETERINARY SCIENCE METAL-WORKING NOT OTHERWISE PROVIDED FOR ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PERFORMING OPERATIONS PHYSICS PROSTHESES RADIATION PYROMETRY RADIATION THERAPY SOLDERING OR UNSOLDERING SURGERY TARIFF METERING APPARATUS TESTING TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS ULTRASOUND THERAPY WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	The present invention provides methods, systems, and apparatus (10) for calibrating a laser ablation system, such as an excimer laser system (11) for selectively ablating a cornea of a patient's eye. The invention also facilitates alignment of eye tracking cameras (36, 38) that measure a position of the eye during laser eye surgery. A calibration and alignment fixture (20) for a scanning laser beam delivery system (12) having eye tracking cameras (36, 38) may include a structure (20) positionable in a treatment plane. The structure (20) having a feature (28) directing laser energy incident thereon to a calibration energy sensor (22), at least one reference-edge (32, 34) to determine a characteristic of the laser beam (shape, dimensions, etc.), and an artificial pupil (40) to determine alignment of the eye tracking cameras (36, 38) with the laser system (10). L'invention concerne des procédés, des systèmes et un appareil (10) permettant d'étalonner un système d'ablation laser, de type système laser à excimères (11) qui permet de procéder sélectivement à l'ablation de la cornée de l'oeil d'un patient. L'invention facilite également l'alignement de caméras de suivi oculaire (36, 38) qui mesurent une position de l'oeil pendant une opération chirurgicale de l'oeil au laser. Un montage (20) d'étalonnage et d'alignement destiné à un système (12) de distribution de faisceau laser de lecture qui présente des caméras de suivi oculaire (36, 38) peut comprendre une structure (20) pouvant être positionnée dans un plan de traitement. Cette (20) structure présente: un équipement (28) qui dirige une énergie laser incidente vers un capteur (22) d'énergie d'étalonnage, au moins un bord référence (32, 34) permettant de déterminer une caractéristique du faisceau laser (forme, dimensions, etc.), et une pupille artificielle (40) permettant de déterminer l'alignement des caméras de suivi oculaire (36, 38) avec le système laser (10).