Share Email Print

Proceedings Paper

Hand-held Raman sensor head for in-situ characterization of meat quality applying a microsystem 671 nm diode laser
Author(s): Heinar Schmidt; Kay Sowoidnich; Martin Maiwald; Bernd Sumpf; Heinz-Detlef Kronfeldt
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

A hand-held Raman sensor head was developed for the in-situ characterization of meat quality. As light source, a microsystem based external cavity diode laser module (ECDL) emitting at 671 nm was integrated in the sensor head and attached to a miniaturized optical bench which contains lens optics for excitation and signal collection as well as a Raman filter stage for Rayleigh rejection. The signal is transported with an optical fiber to the detection unit which was in the initial phase a laboratory spectrometer with CCD detector. All elements of the ECDL are aligned on a micro optical bench with 13 x 4 mm2 footprint. The wavelength stability is provided by a reflection Bragg grating and the laser has an optical power of up to 200 mW. However, for the Raman measurements of meat only 35 mW are needed to obtain Raman spectra within 1 - 5 seconds. Short measuring times are essential for the hand-held device. The laser and the sensor head are characterized in terms of stability and performance for in-situ Raman investigations. The function is demonstrated in a series of measurements with raw and packaged pork meat as samples. The suitability of the Raman sensor head for the quality control of meat and other products will be discussed.

Paper Details

Date Published: 30 April 2009
PDF: 8 pages
Proc. SPIE 7312, Advanced Environmental, Chemical, and Biological Sensing Technologies VI, 73120H (30 April 2009); doi: 10.1117/12.818163
Show Author Affiliations
Heinar Schmidt, Technical Univ. Berlin (Germany)
Kay Sowoidnich, Technical Univ. Berlin (Germany)
Martin Maiwald, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
Bernd Sumpf, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
Heinz-Detlef Kronfeldt, Technical Univ. Berlin (Germany)

Published in SPIE Proceedings Vol. 7312:
Advanced Environmental, Chemical, and Biological Sensing Technologies VI
Tuan Vo-Dinh; Robert A. Lieberman; Günter Gauglitz, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?