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On which factor does the output of photodiode in circular scanners depends upon?

(a) Frequency of illumination incidented

(b) Frequency of illumination reflected

(c) Amplitude of illumination incidented

(d) Amplitude of illumination reflected

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Asked question is from Circular Scanning topic in division Machine Vision Systems of Engineering Metrology

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The correct choice is (c) Amplitude of illumination incidented

Explanation: In circular scanners, each photodiode site will output a signal that is directly proportional in amplitude to the illumination incident upon it. This output is a serial analog data stream whose rate is determined by the input clock frequency.

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