30 October 2007 Imaging and phase measurements of 3D objects at 10.6 microns by digital holography
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Abstract
Digital holography in the mid infrared range is shown to be a feasible technique for optical metrological applications. The technique allows to reconstruct both amplitude and phase of wavefronts scattered by a 3D object. Experimental results of the method applied to the reconstruction of digitally holograms recorded at CO2 laser wavelength of 10.6 micron are reported. It is show that good reconstructions can be obtained even with the lower spatial resolution of IR recording detectors compared to visible CCD array. The results show that new prospective can be exploited by using high power CO2 laser sources in optical metrological applications.
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Pietro Ferraro, Simonetta Grilli, Lisa Miccio, Paul Buahbassuah, Riccardo Meucci, Sergio De Nicola, F. Tito Arecchi, "Imaging and phase measurements of 3D objects at 10.6 microns by digital holography", Proc. SPIE 6736, Unmanned/Unattended Sensors and Sensor Networks IV, 673612 (30 October 2007); doi: 10.1117/12.746239; https://doi.org/10.1117/12.746239
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KEYWORDS
Digital holography

Holograms

3D image reconstruction

Gas lasers

Carbon monoxide

Sensors

Phase measurement

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