Highly sensitive with rapid response times. However, their spectral response is limited by the cut-off wavelength determined by the material's bandgap energy. Noise and Performance Metrics
Photon detectors interact directly with incoming photons, liberating electrons to create an electrical current.
Boyd discusses various radiometric instruments, including spectrometers, radiometers, and spectrophotometers. These instruments are used to measure the spectral and spatial distribution of optical radiation. The book covers the design and calibration of these instruments, as well as their applications in various fields.
): Power emitted per unit solid angle from a point source, measured in Watts per steradian (W/sr). Radiance (
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): The ratio of electrical output (current or voltage) to the optical input power (
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Utilize the Seebeck effect to generate a voltage proportional to temperature differences.
: Covers Maxwell’s equations, wave theory, and the formal definitions of radiometric quantities like radiance and irradiance. Blackbody Radiation