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Pushbroom NIR hyperspectral imager using MOEMS scanning grating chips

 
: Grüger, H.; Egloff, T.; Scholles, M.; Zimmer, F.; Müller, M.; Schenk, H.

:

Dickensheets, D.L. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
MOEMS and miniaturized systems VII : 22 - 23 January 2008, San Jose, California, USA
Bellingham, WA: SPIE, 2008 (SPIE Proceedings Series 6887)
ISBN: 978-0-8194-7062-1
Paper 68870E
Conference "MOEMS and Miniaturized Systems" <7, 2008, San Jose/Calif.>
Englisch
Konferenzbeitrag
Fraunhofer IPMS ()
micro mechanical grating; hyperspectral imaging; imaging spectrometer; spectroscopy; scanning grating; micro scanning mirror

Abstract
"NIR Hyperspectral Imaging" is a universal tool to measure and control chemical properties of objects. The combination of digital imaging and molecular spectroscopy exhibits a great benefit, especially for in- and on-line analysis. However, a wide use is impeded at present due to the expensive and complex system approach. One reason is the high cost of two dimensional InGaAs detector arrays, another one is the special glass that is used in the near infrared NIR.
In this paper a new approach for a NIR Imaging spectrometer is presented. The base of the new Pushbroom Hyperspectral Imager is a micromechanical scanning device with an integrated diffraction grating. This MOEMS device is made in a standard SOI fabrication process developed at Fraunhofer IPMS 1 2 3. For the Hyperspectral Imager, a new all-reflective optical system based on a Schiefspiegler setup has been developed. The simulated optical configuration and the achieved performance of the system will be presented.

: http://publica.fraunhofer.de/dokumente/N-77631.html