Automatic correction of diffraction pattern shift in a pushbroom hyperspectral imager with a piezoelectric internal line-scanning unit

Mohammad Abdo; Erik Förster; Patrick Bohnert; Moritz Stürmer; Vlad Badilita; Robert Brunner; Ulrike Wallrabe; Jan G. Korvink

doi:10.1117/12.2248467

20 February 2017 Automatic correction of diffraction pattern shift in a pushbroom hyperspectral imager with a piezoelectric internal line-scanning unit

Mohammad Abdo, Erik Förster, Patrick Bohnert, Moritz Stürmer, Vlad Badilita, Robert Brunner, Ulrike Wallrabe, Jan G. Korvink

Author Affiliations +

Proceedings Volume 10110, Photonic Instrumentation Engineering IV; 1011004 (2017) https://doi.org/10.1117/12.2248467
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Pushbroom hyperspectral imaging systems require relative motion with respect to the target for hyperspectral data acquisition by means of spatial scanning, which increases the equipment cost and limits the application scenarios. We address this by introducing a pushbroom system with an internal line-scanning unit consisting of a slit aperture mounted on a piezoelectric linear motor. Different slit positions have tilted incidence angles at the grating, resulting in shifts of diffraction patterns relative to the imaging sensor. We demonstrate a method to compensate this shift by using a rotating arm controlled by a stepper motor to reposition the camera based on slit position.

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Mohammad Abdo, Erik Förster, Patrick Bohnert, Moritz Stürmer, Vlad Badilita, Robert Brunner, Ulrike Wallrabe, and Jan G. Korvink "Automatic correction of diffraction pattern shift in a pushbroom hyperspectral imager with a piezoelectric internal line-scanning unit", Proc. SPIE 10110, Photonic Instrumentation Engineering IV, 1011004 (20 February 2017); https://doi.org/10.1117/12.2248467

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