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Proceedings Paper

Chromatic confocal spectral interferometry with wavelet analysis
Author(s): E. Papastathopoulos; K Körner; W. Osten
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Paper Abstract

In the present paper, we address a hybrid technique which combines the method of spectral interferometry with chromatic confocal microscopy. On the basis of some proof-of-principle experiments, it is shown that with this new concept, the axial detection range of the sensor is decoupled from the limited depth-of-focus of the employed microscope objective, and a high numerical aperture objective can be employed for detection. The attained interferometric signals consist of high-contrast wavelets, measured in the λ-domain. The position of an investigated object is measured by analyzing the spectral-phase of the attained wavelets. In particular, chirp-effects as well as the significant role of confocal filtering are discussed.

Paper Details

Date Published: 22 April 2006
PDF: 9 pages
Proc. SPIE 6189, Optical Sensing II, 618913 (22 April 2006); doi: 10.1117/12.662408
Show Author Affiliations
E. Papastathopoulos, Univ. Stuttgart (Germany)
K Körner, Univ. Stuttgart (Germany)
W. Osten, Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 6189:
Optical Sensing II
Brian Culshaw; Anna G. Mignani; Hartmut Bartelt; Leszek R. Jaroszewicz, Editor(s)

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