Imaging spectrometer for process industry applications

Esko Herrala, Jukka Okkonen, Timo Hyvärinen, Mauri Aikio, Jorma Lammasniemi

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    47 Citations (Scopus)


    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.
    Original languageEnglish
    Title of host publicationOptical Measurements and Sensors for the Process Industries
    EditorsChristophe Gorecki, Richard W. Preater
    Place of PublicationFrankfurt
    PublisherInternational Society for Optics and Photonics SPIE
    ISBN (Print)978-0-8194-1554-7
    Publication statusPublished - 1994
    MoE publication typeA4 Article in a conference publication
    EventOptical Measurements and Sensors for the Process Industries - Frankfurt, Germany
    Duration: 20 Jun 199424 Jun 1994

    Publication series

    SeriesProceedings of SPIE


    ConferenceOptical Measurements and Sensors for the Process Industries


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