Mr. Arie Chernobrov Profile

Arie Chernobrov

at Elbit Systems Electro-optics-Elop

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Proceedings Article | 23 January 2003 Paper

ElOp EO/IR LOROP camera: image stabilization for dual-band whiskbroom scanning photography

Vladimir Petrushevsky, Yehoshua Karklinsky, Arie Chernobrov

Proceedings Volume 4820, (2003) https://doi.org/10.1117/12.453838

KEYWORDS: Cameras, Telescopes, Mirrors, Sensors, Photography, Control systems, Infrared imaging, Image processing, Fermium, Frequency modulation

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The ELOP dual band LOROP camera was designed as a payload of a 300 gal reconnaissance pod capable of being carried by a single-engineerd fighter aircrat like F-16. The optical arrangement provides coincidence of the IR and EO optical axes, as well as equality of the fields-of-view. These features allow the same sacn coverage to be achieved, and the same gimbals control software to be used for the visible-light-only, IR-only and simultaneous dual band photography. Because of intensive, broadband vibration existing in teh pod environment, special attention was given to image stabilization system. Nevertheless, residual vibraiton still exists in a wide frequency range spreading from zero frequency to the detector integration rate and beyond it. Hence, evaluation of the camera performance could not rely on the well-known analytical solutions for MTF_MOTION. The image motion is deinfed in terms of the Power Spectral Density throughout the whole frequency range of interest. The expected MTF_MOTION is calculated numerically using a statistical approach. Aspects of the staggered-structure IR detecotr application in oblique photography are discussed. Particuarly, the ground footprint of the IR detector is much wider along-scan than one of the EO detector, requiring considerations to be implemented in order to prevent IR image deformation.

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