Techniques for correcting non-linearity in a photodetector using

Details Techniques for correcting non-linearity in a photodetector using Techniques for correcting non-linearity in a photodetector using

1992-05-12

1993-11-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214A, H01J 4014

Patent

active

052626350

ABSTRACT:
A technique that corrects photodetector non-linearity without increasing the noise level in the detector signal. The detector is coupled to a preamplifier characterized by the absence of positive feedback, and the preamplifier signal is communicated to a linear amplifier whose output signal is then digitized. The digitized signal is then transformed according to stored calibration information that is representative of the non-linear characteristic of the photodetector. The transformed digitized value thus exhibits a linear characteristic as a function of the intensity of the light source. A number of embodiments perform the correction in hardware before digitizing the signal.

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Technical Support Package on "Correcting for Nonlinearity in a Photodetector" for NASA Tech Brief, vol. 10, No. 2, Item #152 from JPL Invention Report NPO-16055/5509, Inventor: R. A. Schindler, Prepared by: R. S. Jamieson, TSP assembled by: JPL Technology Utilization Office, pp. i, 1-4, Mar. 1986.

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