| Issue |
MATEC Web of Conferences
Volume 32, 2015
International Symposium of Optomechatronics Technology (ISOT 2015)
|
|
|---|---|---|
| Article Number | 07003 | |
| Number of page(s) | 3 | |
| Section | Tunable and adaptive optics | |
| DOI | https://doi.org/10.1051/matecconf/20153207003 | |
| Published online | 02 December 2015 | |
An Enclosed variable focusing lens for remote welding
1 Hiroshima Institute of Technology, Department of mechanical engineering systems, 2-1-1 Miyake, Saeki-ku, Hiroshima 731-5193, Japan
2 Chiba Institute of Technology, Precision Engineering, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
3 Utsunomiya University Center for Optical Research & Education (CORE), 7-1-2 Yoto, Utsunomiya-city, Tochigi, 321-8585, Japan
a Corresponding author: r.kuwano.wc@cc.it-hiroshima.ac.jp
In this study, a variable focusing lens with a driving mechanism was developed. The surface curvature of the lens is formed via the interaction of elastic film tension and liquid pressure generated by compression of a bellows, which enables the focal length to be changed. This paper discusses the optical characteristics of the lens system. The focal length range is 250 – 750 mm with beam diameters of 0.3 mm – 0.9 mm, respectively, when a YAG laser is irradiated. In the study, the lens system was applied to laser beam welding of mild-steel sheet with a thickness of 0.5 mm for 3,000 shots of laser irradiation at a peak power of 4.7 kW and a duration of 10 ms.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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