2025 SMSI Bannerklein

P3.6 Indirect geometry measurement method for in situ application in laser chemical machining

Event
SMSI 2020
-
(did not take place because of Covid-19 virus pandemic)
Band
SMSI 2020 - Measurement Science
Chapter
P3 Advanced Methods and Approaches in Measurement
Author(s)
M. Mikulewitsch, D. Stöbener, A. Fischer - University of Bremen, Bremen (Germany)
Pages
327 - 328
DOI
10.5162/SMSI2020/P3.6
ISBN
978-3-9819376-2-6
Price
free

Abstract

The optical geometry measurement of submerged micro-surfaces in chaotic fluid environments, e.g. for electric discharge machining (EDM) or laser chemical machining (LCM), is challenging when the specimen feature high aspect ratios and steep surface gradients. To avoid reflection-caused artifacts at steep gradients, fluorescent molecules are added to the fluid, whose fluorescence is detected with a confocal setup. A model-based signal processing enables an indirect measurement in fluid layers > 1 mm and is capable to cope with process-inherent bubbles and surface gradients up to 84°.

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