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Proceedings Paper

Novel shaping optics of CO2 laser beam: LSV optics--principles and applications
Author(s): Isamu Miyamoto; Yukihiro Horiguchi; Hiroshi Maruo
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Paper Abstract

A novel beam shaping optics, Linear-polarized Shape Variable (LSV) optics for high power CO2 laser beam has been developed, which provides a beam spot with variable beam shape in terms of different aspect ratios, and negligible shaping loss of 5% with high beam absorptivity of 50% in non-coated steel, which is as high as carbon coated steel, The high efficiencies both in shaping and metal heating are attained by utilizing linear-polarized CO2 laser beam. In laser hardening, the case depth larger than 2mm (width=l5mm) was obtained without any absorption coating. By changing the beam width in the direction of beam motion, D, in accordance with the traveling speed, hardened depth from 0.3mm to 2.5mm (width=l5mm) was obtained at constant surface temperature of 1400 C at 3kW power level. LSV optics was also used for local heating up to 1100 C in brazing Si3N4 ceramics with insertion of Al foil, and joint strength as high as 400 MPa was obtained in an irradiation time of about 20 sec without any preheating.

Paper Details

Date Published: 1 October 1990
PDF: 15 pages
Proc. SPIE 1276, CO2 Lasers and Applications II, (1 October 1990); doi: 10.1117/12.20546
Show Author Affiliations
Isamu Miyamoto, Osaka Univ. (Japan)
Yukihiro Horiguchi, Nippei Toyama Research Institute (Japan)
Hiroshi Maruo, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 1276:
CO2 Lasers and Applications II
Hans Opower, Editor(s)

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