Spectrophotometric instrument with rapid scanning distortion correction
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United States of America Patent
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-
Mar 5, 1991
Grant Date -
N/A
app pub date -
Sep 27, 1989
filing date -
Sep 27, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a spectrophotometric instrument, a system is provided to correct for distortion caused by rapid scanning of the spectrum. In the instrument, photodetectors detect light energy which is scanned through a spectrum at a rapid rate. An amplifier amplifies the output signal generated by the photodetectors. The output signal of the amplifier is sampled at increments and the samples are converted to digital values. A first derivative is determined from the digital values by subtracting from each value the value from the preceding increment. The first derivative values are multiplied times a constant selected to correct for the distortion and the resulting product values are added to the amplitude digital values to provide a set of corrected values representing the intensity detected by the photodetectors.
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