Abstract
Statistical field of optical radiation . The energy conservation law for any electromagnetic field implies, that the time derivative \( \partial Q/\partial t \) of the field energy for optical radiation , which ranges from wavelength as short as 1 nm to one as long as 1 mm
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Notes
- 1.
It is more correct to speak about the averaging with respect to some appropriate ensemble of values, which characterizes statistical properties of the electromagnetic field of radiation, but as long as the optical radiation fields are, by vast majority, ergodic and statistically homogeneous , their space and time averages coincide with the average by the ensemble.
- 2.
In optical glasses any practical anisotropy of scattering molecules is averaged by their great quantity even for a volume on an order of \( \uplambda^{3} \).
- 3.
Correlation between fluctuations of Fourier components of optical radiation , and criteria of practical exposures of coherence and diffraction effects in radiometry will be analyzed in Chap. 3.
- 4.
The term “no interference ” means no interference effect may affect the radiometric concept, which from the standpoint of the law of conservation of energy means that all effects of any actual interference pattern, which may occur while adding coherent light beams, are to be averaged over the space or time of the specific radiometric or photometric observation .
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Bukshtab, M. (2019). Radiometric and Photometric Quantities and Notions. In: Photometry, Radiometry, and Measurements of Optical Losses. Springer Series in Optical Sciences, vol 209. Springer, Singapore. https://doi.org/10.1007/978-981-10-7745-6_1
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DOI: https://doi.org/10.1007/978-981-10-7745-6_1
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