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Proceedings Paper

Imaging spectrometer for process industry applications
Author(s): Esko Herrala; Jukka T. Okkonen; Timo S. Hyvarinen; Mauri Aikio; Jorma Lammasniemi
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Paper Abstract

This paper presents an imaging spectrometer principle based on a novel prism-grating-prism (PGP) element as the dispersive component and advanced camera solutions for on-line applications. The PGP element uses a volume type holographic plane transmission grating made of dichromated gelatin (DCG). Currently, spectrographs have been realized for the 400 - 1050 nm region but the applicable spectral region of the PGP is 380 - 1800 nm. Spectral resolution is typically between 1.5 and 5 nm. The on-axis optical configuration and simple rugged tubular optomechanical construction of the spectrograph provide a good image quality and resistance to harsh environmental conditions. Spectrograph optics are designed to be interfaced to any standard CCD camera. Special camera structures and operating modes can be used for applications requiring on-line data interpretation and process control.

Paper Details

Date Published: 15 November 1994
PDF: 8 pages
Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994); doi: 10.1117/12.194344
Show Author Affiliations
Esko Herrala, VTT Electronics (Finland)
Jukka T. Okkonen, VTT Electronics (Finland)
Timo S. Hyvarinen, VTT Electronics (Finland)
Mauri Aikio, VTT Electronics (Finland)
Jorma Lammasniemi, VTT Electronics (Finland)

Published in SPIE Proceedings Vol. 2248:
Optical Measurements and Sensors for the Process Industries
Christophe Gorecki; Richard W. T. Preater, Editor(s)

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