4. Optical Detectors
Just as the retina of the eye acts as the transducer between the scene and the visual stimulus for the observer, the detector acts as the transducer of optical radiation into an electrical signal that can be processed by the system. No detector has sufficient bandwidth to respond to extremely high frequencies ( up to ), dictated by the wave theory of light, of the electromagnetic field on the sensitive surface. Photonic detection is quadratic in nature; the electrical signal (current or voltage) at the detector output is, for the fastest detectors,...
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Optical Detectors
Signal-to-noise ratio
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