Invention Grant
US09533370B2 Method for laser marking an anodized metal surface with a desired colour
有权
用所需颜色激光标记阳极氧化金属表面的方法
- Patent Title: Method for laser marking an anodized metal surface with a desired colour
- Patent Title (中): 用所需颜色激光标记阳极氧化金属表面的方法
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Application No.: US15036967Application Date: 2014-12-01
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Publication No.: US09533370B2Publication Date: 2017-01-03
- Inventor: Horia Sorin Andrei , Paul Martin Harrison
- Applicant: SPI Lasers UK Limited
- Applicant Address: GB Southampton
- Assignee: SPI Lasers UK Limited
- Current Assignee: SPI Lasers UK Limited
- Current Assignee Address: GB Southampton
- Agency: Iandiorio Teska & Coleman, LLP
- Priority: GB1321322.8 20131203
- International Application: PCT/GB2014/000497 WO 20141201
- International Announcement: WO2015/082869 WO 20150611
- Main IPC: B23K26/00
- IPC: B23K26/00 ; B41M5/26 ; B23K26/06 ; B41J3/413

Abstract:
A method for laser marking an anodized metal surface (5) with a desired color, which method comprises: providing a laser (1) for emitting a laser beam (4) comprising laser pulses having a pulse energy, a pulse width, and a pulse repetition frequency; providing a scanner (2) comprising a first mirror (6) for scanning the laser beam in a first direction (8), and a second mirror (7) for scanning the laser beam in a second direction (9); providing a lens (3) for focussing the laser beam from the laser (2) onto the anodized metal surface (5) to form a spot (31) having a spot diameter and a pulse fluence; providing a controller (11) for controlling the scanner (2) with a control signal (12); marking a plurality of lines (15) separated by a hatch distance (19) on the anodized metal surface to form a desired mark (16) by scanning the scanner (2) while pulsing the laser (1); selecting a scan speed (16), the pulse repetition frequency, and the spot diameter such that the separation (18) between consecutive spots (31) during each scan of the scanner (2) is at least one quarter of the spot diameter; the method being characterized by: overwriting each line (15) more than once; the color being given by the spot to spot separation (18), hatch distance (19), the pulse fluence, the pulse width, and the number of times each line is written; and selecting the spot to spot separation (18), the hatch distance (19), the pulse fluence, the pulse width, and the number of times each line is written to form the desired color.
Public/Granted literature
- US20160256955A1 Method For Laser Marking An Anodized Metal Surface With A Desired Colour Public/Granted day:2016-09-08
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