SPECKLE PATTERN DISPERSION DEVICE AND LASER BEAM IRRADIATION SYSTEM

PROBLEM TO BE SOLVED: To temporally disperse a speckle pattern to average the speckle pattern. SOLUTION: Laser beam 1 from a laser oscillator 101 is transmitted to an optical fiber 103 through a condenser lens 102; and when laser beam 3 is transmitted through an acoustooptic deflector 109 as laser b...

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Bibliographische Detailangaben
Hauptverfasser:	KUWABARA KOJI, SASAKI HIROHARU
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FREQUENCY-CHANGING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICS SOLDERING OR UNSOLDERING TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSMISSION TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To temporally disperse a speckle pattern to average the speckle pattern. SOLUTION: Laser beam 1 from a laser oscillator 101 is transmitted to an optical fiber 103 through a condenser lens 102; and when laser beam 3 is transmitted through an acoustooptic deflector 109 as laser beam 4 of parallel rays by a collimator lens 104, the refractive index of the acoustoopic deflector 109 is temporally changed by the ultrasontic signal from a driving power source 110. Laser beam 4 of parallel rays is made incident on a reflection mirror 105 as speckle pattern dispersion light 5, and this dispersion light 5 is thrown to a processing sample 108 through a uniform intensity distribution optical system 106 as laser beam having a uniform intensity distribution.