Variable filter array spectrometer of VPD PbSe

R. Linares-Herrero; G. Vergara; R. Gutiérrez-Álvarez; C. Fernández-Montojo; L. J. Gómez; V. Villamayor; A. Baldasano-Ramírez; M. T. Montojo

doi:10.1117/12.919305

18 May 2012 Variable filter array spectrometer of VPD PbSe

R. Linares-Herrero, G. Vergara, R. Gutiérrez-Álvarez, C. Fernández-Montojo, L. J. Gómez, V. Villamayor, A. Baldasano-Ramírez, M. T. Montojo

Author Affiliations +

Proceedings Volume 8354, Thermosense: Thermal Infrared Applications XXXIV; 835412 (2012) https://doi.org/10.1117/12.919305
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

MWIR spectroscopy shows a large potential in the current IR devices market, due to its multiple applications (gas detection, chemical analysis, industrial monitoring, combustion and flame characterization, food packaging etc) and its outstanding performance (good sensitivity, NDT method, velocity of response, among others), opening this technique to very diverse fields of application, such as industrial monitoring and control, agriculture, medicine and environmental monitoring. However, even though a big interest on MWIR spectroscopy technique has been present in the last years, two major barriers have held it back from its widespread use outside the laboratory: the complexity and delicateness of some popular techniques such as Fourier-transform IR (FT-IR) spectrometers, and the lack of affordable specific key elements such a MWIR light sources and low cost (real uncooled) detectors. Recent developments in electrooptical components are helping to overcome these drawbacks. The need for simpler solutions for analytical measurements has prompted the development of better and more affordable uncooled MWIR detectors, electronics and optics. In this paper a new MWIR spectrometry device is presented. Based on linear arrays of different geometries (64, 128 and 256 elements), NIT has developed a MWIR Variable Filter Array Spectrometer (VFAS). This compact device, with no moving parts, based on a rugged and affordable detector, is suitable to be used in applications which demand high sensitivity, good spectral discrimination, reliability and compactness, and where an alternative to the traditional scanning instrument is desired. Some measurements carried out for several industries will be also presented.

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R. Linares-Herrero, G. Vergara, R. Gutiérrez-Álvarez, C. Fernández-Montojo, L. J. Gómez, V. Villamayor, A. Baldasano-Ramírez, and M. T. Montojo "Variable filter array spectrometer of VPD PbSe", Proc. SPIE 8354, Thermosense: Thermal Infrared Applications XXXIV, 835412 (18 May 2012); https://doi.org/10.1117/12.919305

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