Intensityinto
Intensityinto is a term used in optics and radiometry to denote the amount of radiant energy entering a system through a boundary from the outside. In this usage, intensityinto refers to the local input power per unit area carried by incoming radiation, and it may be specified for a particular wavelength or range of wavelengths. The term is not universally standardized, but is sometimes adopted in notes and models to distinguish incoming energy from energy that is transmitted, reflected, or absorbed by the system.
Definition and notes: In standard radiometry, the quantity most directly corresponding to intensityinto is irradiance (or
Measurement and computation: Intensityinto is typically determined by measurements with a radiometer or pyranometer, sometimes using
Applications and limitations: It is relevant in solar energy, photodetector characterization, and optical coatings. Because intensityinto
See also: irradiance, spectral irradiance, radiant intensity, radiance, radiometry.