BLACK SUB-ANODIZED MARKING USING PICOSECOND BURSTS

A method includes generating a plurality of pulse bursts with a predetermined quantity of intra-burst pulses in each pulse burst and a temporal spacing between the intra-burst pulses, and with a pulse burst frequency, and scanning the pulse bursts across an anodized target at a scan rate so that the...

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Bibliographische Detailangaben
Hauptverfasser:	Dittli Adam, Gross Ken
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CLADDING OR PLATING BY SOLDERING OR WELDING COLOUR PRINTING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DEVICES USING STIMULATED EMISSION ELECTRICITY LINING MACHINES MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES SOLDERING OR UNSOLDERING STAMPS TRANSPORTING TYPEWRITERS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A method includes generating a plurality of pulse bursts with a predetermined quantity of intra-burst pulses in each pulse burst and a temporal spacing between the intra-burst pulses, and with a pulse burst frequency, and scanning the pulse bursts across an anodized target at a scan rate so that the pulse bursts overlap at the anodized target by an amount that is above an overlap damage threshold and the intra-burst pulses provide a peak power and peak fluence that are below an ablation threshold of the anodized target so as to produce a laser mark on the anodized target with an L value of less than or equal to 30 and without a damage to an anodized layer of the anodized target.