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The present state of radiometry and photometry
Normalization in radiometry
28 other sections not shown
absorption ambient aperture applied array atmosphere background band beam blackbody blackbody radiation bolometer calibration camera cavity collimator concept constant cooled curve defined density detection detector direction element emission emittance emitted energy entrance pupil equation field of view field stop filter focal plane focal plane array frequency function geometrical given incident infrared instrument integral irradiance lens limited lumen luminous luminous intensity measurements meter mirror modulation noise nomenclature normalized obtained operation optical radiation output parameters performance photometry photon pixel radiant emittance radiant flux radiant intensity radiant power radiometer radiometric quantities range ratio reflectance refractive refractive index region scan scanner sensor shown in Figure signal solid angle spatial spectral distribution spectral radiant sterance spectral responsivity spectrometer SPIE standard steradian sterisent target Technology telescope thermal tion transmittance unit voltage watts wavelength wavenumber zero