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Proceedings Paper

10000 pixels wide CMOS frame imager for earth observation from a HALE UAV
Author(s): B. Delauré; S. Livens; J. Everaerts; R. Kleihorst; Gert Schippers; Yannick De Wit; John Compiet; Bartosz Banachowicz
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Paper Abstract

MEDUSA is the lightweight high resolution camera, designed to be operated from a solar-powered Unmanned Aerial Vehicle (UAV) flying at stratospheric altitudes. The instrument is a technology demonstrator within the Pegasus program and targets applications such as crisis management and cartography. A special wide swath CMOS imager has been developed by Cypress Semiconductor Cooperation Belgium to meet the specific sensor requirements of MEDUSA. The CMOS sensor has a stitched design comprising a panchromatic and color sensor on the same die. Each sensor consists of 10000*1200 square pixels (5.5μm size, novel 6T architecture) with micro-lenses. The exposure is performed by means of a high efficiency snapshot shutter. The sensor is able to operate at a rate of 30fps in full frame readout. Due to a novel pixel design, the sensor has low dark leakage of the memory elements (PSNL) and low parasitic light sensitivity (PLS). Still it maintains a relative high QE (Quantum efficiency) and a FF (fill factor) of over 65%. It features an MTF (Modulation Transfer Function) higher than 60% at Nyquist frequency in both X and Y directions The measured optical/electrical crosstalk (expressed as MTF) of this 5.5um pixel is state-of-the art. These properties makes it possible to acquire sharp images also in low-light conditions.

Paper Details

Date Published: 23 September 2009
PDF: 8 pages
Proc. SPIE 7474, Sensors, Systems, and Next-Generation Satellites XIII, 74741D (23 September 2009); doi: 10.1117/12.830448
Show Author Affiliations
B. Delauré, Flemish Institute for Technological Research (Belgium)
S. Livens, Flemish Institute for Technological Research (Belgium)
J. Everaerts, Flemish Institute for Technological Research (Belgium)
R. Kleihorst, Flemish Institute for Technological Research (Belgium)
Gert Schippers, Cypress Semiconductor Corp. (Belgium)
Yannick De Wit, Cypress Semiconductor Corp. (Belgium)
John Compiet, Cypress Semiconductor Corp. (Belgium)
Bartosz Banachowicz, Cypress Semiconductor Corp. (Belgium)


Published in SPIE Proceedings Vol. 7474:
Sensors, Systems, and Next-Generation Satellites XIII
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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