SYSTEM FOR SCANNING A SURGICAL LASER BEAM

In a laser beam delivery system for a surgical laser beam, steering and scanning of the laser beam along the target (20) in transverse (X and Y) directions is accomplished in a mechanically simple and fast-responding manner. Closely adjacent to the objective lens assembly (24) of the delivery system...

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Bibliographische Detailangaben
Hauptverfasser:	FOUNTAIN, WILLIAM D, KNOPP, CARL F
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BANDAGES, DRESSINGS OR ABSORBENT PADS CLADDING OR PLATING BY SOLDERING OR WELDING 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 DIAGNOSIS ELECTROTHERAPY FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE IDENTIFICATION MACHINE TOOLS MAGNETOTHERAPY MEDICAL OR VETERINARY SCIENCE METAL-WORKING NOT OTHERWISE PROVIDED FOR ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PERFORMING OPERATIONS PROSTHESES RADIATION THERAPY SOLDERING OR UNSOLDERING SURGERY TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS ULTRASOUND THERAPY WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	In a laser beam delivery system for a surgical laser beam, steering and scanning of the laser beam along the target (20) in transverse (X and Y) directions is accomplished in a mechanically simple and fast-responding manner. Closely adjacent to the objective lens assembly (24) of the delivery system is a pair of prisms (12, 14), i:e. Risley prism Ar Herschel prism; positioned on the axis (16) of the approaching laser beam (18). The two prisms are mounted on separate rotating stages whereby they may be individually rotated about the beam axis. Co-rotation of the prisms produces circular scans, in diameters depending on the angle between the prisms. Counter rotation of the prisms at equal speeds will produce a diametric line scan. Any desired complex scan pattern can be achieved using combinations of rotations of the prisms. Axial compactness and proximity to the objective lens as- sembly assure that virtually all of the angularly emerging beam from the pri sm pair passes through the objective lens assembly.