Title:
LASER MARKER
Document Type and Number:
WIPO Patent Application WO/1997/004917
Kind Code:
A1
Abstract:
A laser marker for rapidly engraving a work piece of different engraving height without degrading the engraving accuracy. A laser marker (1) irradiates the surface of a work piece (4) with a laser beam (2) given various pattern information through a condenser lens (52) and a glass plate (53) which acts to change the focal length of the condenser lens, and engraves the surface of the work piece. The glass plate (53) is received in a housing (5) together with the condenser lens (52). Instead of a single glass plate (53), plural glass plates (53A, 53B, 53C) of different thicknesses may me provided, and a first glass plate driving mechanism (530) is provided for placing one of the glass plates in the laser beam path.
Inventors:
YOSHIDA KOJI (JP)
MORI AKIRA (JP)
MORI AKIRA (JP)
Application Number:
PCT/JP1996/002159
Publication Date:
February 13, 1997
Filing Date:
July 31, 1996
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
YOSHIDA KOJI (JP)
MORI AKIRA (JP)
YOSHIDA KOJI (JP)
MORI AKIRA (JP)
International Classes:
B23K26/00; B23K26/04; B23K26/06; (IPC1-7): B23K26/06
Foreign References:
| JPH058070A | 1993-01-19 | |||
| JPS63173322A | 1988-07-16 | |||
| JPH04367386A | 1992-12-18 |
Other References:
See also references of EP 0885685A4
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