The Multispectral Thermal Imager Optical Assembly (OA) has been fabricated, assembled, successfully performance tested, and integrated into the flight payload structure with the flight Focal Plane Assembly (FPA) integrated and aligned to it. This represents a major milestone achieved towards completion of this earth observing E-O imaging sensor that is to be operated in low earth orbit. The OA consists of an off- axis three mirror anastigmatic (TMA) telescope with a 36 cm unobscured clear aperture, a wide-field-of-view (WFOV) of 1.82 degrees along the direction of spacecraft motion and 1.38 degree across the direction of spacecraft motion. It also contains a comprehensive on-board radiometric calibration system. The OA is part of a multispectral pushbroom imaging sensor which employs a single mechanically cooled focal plane with 15 spectral bands covering a wavelength range from 0.45 to 10.7 micrometer. The OA achieves near diffraction-limited performance from visible to the long-wave infrared (LWIR) wavelengths. The two major design drivers for the OA are 80% enpixeled energy in the visible bands and radiometric stability. Enpixeled energy in the visible bands also drove the alignment of the FPA detectors to the OA image plane to a requirement of less than plus or minus 20 micrometer over the entire visible detector field of view (FOV). Radiometric stability requirements mandated a cold Lyot stop for stray light rejection and thermal background reduction. The Lyot stop is part of the FPA assembly and acts as the aperture stop for the imaging system. The alignment of the Lyot stop to the OA drove the centering and to some extent the tilt alignment requirements of the FPA to the OA.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Multispectral Thermal Imager optical assembly performance and integration of the flight focal plane assembly


    Beteiligte:

    Kongress:

    Imaging Spectrometry V ; 1999 ; Denver,CO,USA


    Erschienen in:

    Erscheinungsdatum :

    1999-10-27





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Prototype focal plane assembly for multispectral remote sensing

    Rienstra, Jeffrey / Vampola, John | AIAA | 1995


    Multispectral Focal Plane Assembly for Satellite Remote Sensing

    Rienstra, J. / Ballard, M. / IEEE; Aerospace and Electronics Systems Society | British Library Conference Proceedings | 1998


    Millimeter wave focal plane array imager

    Huguenin, G. Richard | SPIE | 1994


    Multispectral Thermal Imager (MTI) Space Cryocooler Development, Integration, and Test

    Tomlinson, B. J. / Burt, W. / Davidson, D. et al. | British Library Conference Proceedings | 1999


    Multispectral Thermal Imager (MTI) Space Cryocooler Development, Integration, and Test

    Davidson, D. / Lanes, C. / Burt, W. et al. | Springer Verlag | 2002