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High-throughput single-shot hyperspectral interferometer for areal profilometry based on microlens array integral field unit

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conference contribution
posted on 27.04.2017 by Pablo Ruiz, Jonathan Huntley
A single-shot technique to measure areal profiles on optically smooth and rough surfaces and for applications in non-cooperative environments is presented. It is based on hyperspectral interferometry (HSI), a technique in which the output of a white-light interferometer provides the input to a hyperspectral imaging system. Previous HSI implementations suffered from inefficient utilisation of the available pixels which limited the number of measured coordinates and/or unambiguous depth range. In this paper a >20-fold increase in pixel utilization is achieved through the use of a 2-D microlens array as proposed for integral field units in astronomy applications. This leads to a 35×35 channel system with an unambiguous depth range of 0.88 mm.

Funding

P. D. Ruiz acknowledges The Royal Society (Industry Fellowship IF2012/R2) and industrial hosts Phase Vision Ltd. and Renishaw plc for their support. J. M. Huntley acknowledges the Engineering and Physical Sciences Research Council (EP/K018124/1) for its financial support.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

SPIE Metrology

Citation

RUIZ, P.D. and HUNTLEY, J.M., 2017. High-throughput single-shot hyperspectral interferometer for areal profilometry based on microlens array integral field unit. IN: Lehmann, P., Osten, W. and Goncalves, A.A. (eds.), SPIE Optical Metrology 2017; 23rd International Congress on Photonics in Europe, Munich, June 25-29th, Paper no. 103290G.

Publisher

© SPIE

Version

AM (Accepted Manuscript)

Acceptance date

14/04/2017

Publication date

2017

Notes

Copyright 2017 Society of Photo- Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited

Language

en

Location

Munich

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