17-429

field of view (of a detector)

solid angle as "seen" by the detector (acceptance angle), e.g. of a radiometer or spectroradiometer, out of which the detector receives radiation

Unit: sr

NOTE 1 The field of view should not be confused with the angular subtense of the apparent source, α.

NOTE 2 A plane angle is sometimes used to describe a circular symmetric solid angle field of view.

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