Title

Modeling Of Gaussian-To-Annular Beam Shaping By Geometrical Optics For Optical Trepanning

Keywords

Annular laser beam; Geometrical optics; Laser drilling; Lens design; Optical trepanning

Abstract

Laser drilling is very important in many industries such as automotive, aerospace, electronics and materials processing. It can be used to produce critical components with novel hole geometry for advanced systems. Percussion drilling and trepanning are two laser drilling methods. In the conventional trepanning method, a laser beam in scanned along a circular or spiral orbit to remove material to achieve a desired hole shape. These orbits generally trace a circular path at the inner wall of the holes. This suggests that an annular beam can be used to accomplish trepanning, which we referred to as optical trepanning. The ray tracing technique of geometrical optics will be employed in this paper to design the necessary optics to transform a Gaussian laser beam into an annular beam of different intensity profiles. Such profiles include half Gaussian with maximum intensities at the inner and outer surfaces of the annulus, respectively, and full Gaussian with maximum intensity within the annulus.

Publication Date

12-1-2004

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

5525

Number of Pages

53-63

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.561084

Socpus ID

13444280295 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/13444280295

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