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Proceedings Paper

Multispectral EO LOROP camera
Author(s): Jens-Rainer Hoefft; Traugott Tietz
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Paper Abstract

Results of an investigation into the concept of a multi- spectral (Vis/MWIR) electro-optical long-range oblique-looking digital camera are presented. Choice of the medium-wave band for the IR channel is discussed. An advanced EO camera would take advantage of available multi-element two-dimensional focal-plane-array sensors. Such detectors being of the staring type with integration times in the order of milliseconds imply provisions to be made to keep the sensor foot print fixed on ground during exposure. So precisely controlled forward-motion compensation as well as passive vibration isolation along with excellent active three-axis stabilization is of paramount importance. In order to provide large ground coverage together with good geometrical resolution, the ground is paved with slightly overlapping sensor foot prints by means of step-wise sweeping the line of sight. Space constraints due to existing- pod geometry as opposed to desired sensitivity performance particularly govern the optics design. An off-axis catoptric system has been chosen for the front objective as a most promising method to cope with the two far-away wavebands as well as to have the different sizes of respective detectors coincide with the instantaneous images of identical foot prints of the two channels.

Paper Details

Date Published: 26 October 1998
PDF: 11 pages
Proc. SPIE 3436, Infrared Technology and Applications XXIV, (26 October 1998); doi: 10.1117/12.328037
Show Author Affiliations
Jens-Rainer Hoefft, Zeiss-Eltro Optronic GmbH (Germany)
Traugott Tietz, Zeiss-Eltro Optronic GmbH (Germany)

Published in SPIE Proceedings Vol. 3436:
Infrared Technology and Applications XXIV
Bjorn F. Andresen; Marija Strojnik, Editor(s)

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