Dynamic range enhancement in high-speed image sensors

S. E. Alexandrov; Gennadii A. Gavrilov; V. K. Gusev; E. E. Mukhin; Galina Yu. Sotnikova

doi:10.1117/12.407677

27 November 2000 Dynamic range enhancement in high-speed image sensors

S. E. Alexandrov, Gennadii A. Gavrilov, V. K. Gusev, E. E. Mukhin, Galina Yu. Sotnikova

Proceedings Volume 4316, International Conference on Lasers for Measurements and Information Transfer; (2000) https://doi.org/10.1117/12.407677
Event: International Conference on Lasers for Measurements and Information Transfer, 2000, St. Petersburg, Russian Federation

Abstract

The paper proposes a new approach to enhancement of the dynamic range of high speed image sensors. This is possible due to momentary exposure fitting to image intensity variation. Unlike the majority of modern devices based on automatic exposure control we suggest fitting just after triggering along with frame processing through momentary feedback. The feedback is implemented through handling an image recorder with an additional diode array. The automatic exposure control system is based on photodiode array (e.g., 8 X 8 elements), operating as an 'exposure meter array,' and is going to be implemented for observation of transient phenomena of plasma discharge development in the spherical tokamak Globus-M. The separate photodiode (photodiodes group) signal associated with a portion of plasma image is used for estimation of CCD sensor exposure time. The operating model of plasma observation system utilizes upon ICX39BLA matrix CCD sensor, ATMEL AT90 S4433 microprocessor, PLM ALTERA (MAX700 series) and SPD-64 photodiode array specially manufactured at Ioffe Institute according to local epitaxy technique.

Citation Download Citation

S. E. Alexandrov, Gennadii A. Gavrilov, V. K. Gusev, E. E. Mukhin, and Galina Yu. Sotnikova "Dynamic range enhancement in high-speed image sensors", Proc. SPIE 4316, International Conference on Lasers for Measurements and Information Transfer, (27 November 2000); https://doi.org/10.1117/12.407677

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