Title:
LASER MARKING
Document Type and Number:
WIPO Patent Application WO2003061891
Kind Code:
A3
Abstract:
A method and apparatus is disclosed for producing precision marks (28) for a metrological scale in the form of a stainless steel ribbon (10). A laser (21) is used to produce ultra-short pulses, which have a fluence at the ribbon such that ablation takes place. The laser light can be scanned via scanner (25) and the pitch of the marks (28) can be controlled. The ablative technique causes little thermal input and improves the accuracy of the scale.
Inventors:
ELLIN ALEXANDER DAVID SCOTT (GB)
HENSHAW JAMES REYNOLDS (GB)
HENSHAW JAMES REYNOLDS (GB)
Application Number:
PCT/GB2003/000266
Publication Date:
December 11, 2003
Filing Date:
January 20, 2003
Export Citation:
Assignee:
RENISHAW PLC (GB)
ELLIN ALEXANDER DAVID SCOTT (GB)
HENSHAW JAMES REYNOLDS (GB)
ELLIN ALEXANDER DAVID SCOTT (GB)
HENSHAW JAMES REYNOLDS (GB)
International Classes:
B23K26/073; B23K101/16; B23K103/04; G01B3/10; (IPC1-7): B23K26/06; G01D3/00
Foreign References:
| EP1145797A2 | 2001-10-17 | |||
| US4932131A | 1990-06-12 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 017, no. 574 (M - 1498) 19 October 1993 (1993-10-19)
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