Multispectral EO LOROP camera

Jens-Rainer Hoefft; Traugott Tietz

doi:10.1117/12.328037

26 October 1998 Multispectral EO LOROP camera

Jens-Rainer Hoefft, Traugott Tietz

Proceedings Volume 3436, Infrared Technology and Applications XXIV; (1998) https://doi.org/10.1117/12.328037
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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.

Citation Download Citation

Jens-Rainer Hoefft and Traugott Tietz "Multispectral EO LOROP camera", Proc. SPIE 3436, Infrared Technology and Applications XXIV, (26 October 1998); https://doi.org/10.1117/12.328037

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