Title

Optical Trepanning With A Refractive Axicon Lens System

Keywords

Annular beam; Axicon; Laser drilling; Optical trepanning

Abstract

Percussion drilling and trepanning are two laser drilling methods. Circular laser spots are generally used in conventional laser drilling. Annular laser beams provide a new laser drilling mechanism. When an annular beam is focused on the workpiece surface, the material around the annulus laser spot is heated, melted, vaporized and removed, leading to the formation of a hole. This process, which we refer to as optical trepanning, does not involve any rotating optics or rotating workpiece. Based on the ray tracing technique, an optical lens system using axicon lenses has been designed to transform a Gaussian circular laser beam into an annular laser beam. Both theoretical and experimental results of irradiances of the annular beam along the optical system were analyzed. Optical trepanning experiments were conducted on stainless Steel-316. Some geometrical and metallurgical characteristics during optical trepanning were investigated.

Publication Date

11-6-2006

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

6290

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.684102

Socpus ID

33750483947 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33750483947

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