УДК: 621.383

Use of adaptive integration time to improve the dynamic range of a focal plane array

Drazhnikov, B.N., Kozlov, K.V., Kuznetsov, P.A., Khamidullin, K.A., Deomidov, A.D.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Дражников Б.Н., Козлов К.В., Кузнецов П.А., Хамидуллин К.А., Деомидов А.Д. Обеспечение расширенного динамического диапазона матричного фотоприемного устройства с помощью адаптивного времени накопления // Оптический журнал. 2016. Т. 83. № 9. С. 60–63.

Drazhnikov B.N., Kozlov K.V., Kuznetsov P.A., Khamidullin K.A., Deomidov A.D. Use of adaptive integration time to improve the dynamic range of a focal plane array [in Russian] // Opticheskii Zhurnal. 2016. V. 83. № 9. P. 60–63.

For citation (Journal of Optical Technology):

B. N. Drazhnikov, K. V. Kozlov, P. A. Kuznetsov, K. A. Khamidullin, and A. D. Deomidov, "Use of adaptive integration time to improve the dynamic range of a focal plane array," Journal of Optical Technology. 83(9), 556-558 (2016). https://doi.org/10.1364/JOT.83.000556

Abstract:

We provide a block diagram of an array element in a large-scale integrated photosignal read circuit with adaptive integration time (which, in this application, depends on the ambient light level). We propose a mathematical description of the light detection process using a focal-plane array with this type of large-scale integrated circuit. We demonstrate that if the focal-plane array transfer function is nonlinear (due to the additive integration time), this will expand the input-signal dynamic range to 130–140 dB. We conclude that a focal-plane array with a log-linear transfer function has a better signal-to-noise ratio (10%–30% higher, with low input current) than one with a logarithmic transfer function, with no degradation to the dynamic range. We provide equations to obtain the dynamic range and signal-to-noise ratio from the transfer function for a focal-plane array.

Keywords:

large-scale integrated circuit, adaptive integration time, photodetector array, dynamic range, transfer function

OCIS codes: 250.3140

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