Title:
PROCESSING HEAD
Document Type and Number:
WIPO Patent Application WO/2019/225174
Kind Code:
A1
Abstract:
A processing head (20) comprising a collimating lens (21) for converting laser light emitted from the emission end of a delivery fiber (12) into collimated light, and a focusing lens (22) for focusing and shining the collimated light onto a workpiece (metal plate W). An optical component provided in the interior of the processing head (20) has, applied thereto, a reflective coat (210) for attenuating unnecessary light (Lsrs) traveling from the delivery fiber (12) toward the workpiece and having a wavelength other than the oscillation wavelength of a fiber laser oscillator (10) among the wavelengths for which an active fiber (103) provided in the fiber laser oscillator (10) has a gain. The reflective coat (210) attenuates the unnecessary light (Lsrs) such that the amount of light when the unnecessary light (Lsrs) is reflected by the reflective coat (210) and enters the delivery fiber (12) from the emission end is no more than −50 dB relative to the light amount of the laser light emitted from the emission end.
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Inventors:
MIURA HIDEO (JP)
OGATA MINORU (JP)
ANZAI KENJI (JP)
OGATA MINORU (JP)
ANZAI KENJI (JP)
Application Number:
PCT/JP2019/015106
Publication Date:
November 28, 2019
Filing Date:
April 05, 2019
Export Citation:
Assignee:
AMADA HOLDINGS CO LTD (JP)
International Classes:
B23K26/064; G02B6/32; H01S3/00; H01S3/067; H01S3/10
Foreign References:
| JP2012243789A | 2012-12-10 | |||
| JP2010167451A | 2010-08-05 | |||
| JPH0618433A | 1994-01-25 |
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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