Optics and photonics. General optical test methods. Measurement of relative irradiance in the image field1 Scope This document specifies general optical test methods for the measurement of the relative irradiance in the image field. This document is applicable to optical imaging systems in the optical spectral region from = 100 nm to = 1 m. Theoretical reflections and the comparison with the calculation apply only to optical systems. This document is applicable to rotationally invariant and rotationally variant systems; anamorphic systems, for example,

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