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

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

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3753..359h&link_type=abstract

Proc. SPIE Vol. 3753, p. 359-368, Imaging Spectrometry V, Michael R. Descour; Sylvia S. Shen; Eds.

Computer Science

Performance

Scientific paper

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.

Affiliated with

Also associated with

No associations

Rating

Multispectral Thermal Imager optical assembly performance and integration of the flight focal plane assembly does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Multispectral Thermal Imager optical assembly performance and integration of the flight focal plane assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multispectral Thermal Imager optical assembly performance and integration of the flight focal plane assembly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1544844