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6 terms
Photonics Dictionary: P
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modulated x
P x
phase-modulated sensor
A phase-modulated sensor is a type of sensor that uses modulation of the phase of a signal to measure changes in a physical quantity. In such sensors, variations in the phase of the signal are...
photoacoustic effect
Generation of an acoustical signal by a sample exposed to modulated light.
photographic sound recorder
A system in which the electrical signal embedded within an audio input signal is converted to a modulated light pattern and recorded on film.
photon tunneling microscope
An instrument in which visible light beyond the critical angle from a metallurgical microscope is focused on a reference surface. A certain fraction of the incident light tunnels through air to the...
power modulation
Power modulation refers to the intentional variation of power levels in a signal, often in the context of electronic communication systems. This modulation technique is used to encode information...
pulse counter detector
A device designed to detect frequency-modulated signals by forming a unidirectional pulse from each sine wave. The direct current of the pulse is proportional to the frequency of the...
Photonics Dictionary
P
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