| 21. | Other important innovations include the integrated photodiode FET receiver and the engineering of GaInAs focal-plane arrays.
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| 22. | The light meter used a dual-concentric segmented silicon photodiode to provide spot or center-weighted readings.
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| 23. | The thermoreflected signal is then measured by a photodiode which is connected to a RF lock-in amplifier.
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| 24. | This combination of R and C integrates the photoresponse over time and thus lengthens the impulse response of the photodiode.
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| 25. | The scattered light is captured by a photodiode, which produces an electronic signal that is converted to a turbidity.
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| 26. | Above the main photodiode is a second photodiode that is used to sense and regulate the power of the laser.
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| 27. | Above the main photodiode is a second photodiode that is used to sense and regulate the power of the laser.
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| 28. | The towers are read out by wavelength-shifting optical fibers in a shashlik geometry coupled to an avalanche photodiode.
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| 29. | The light is channeled through the a-Si photodiode layer where it is converted to a digital output signal.
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| 30. | As a photodiode, an LED is sensitive to wavelengths equal to or shorter than the predominant wavelength it emits.
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