Physics – Optics
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apopt..18.1360p&link_type=abstract
Applied Optics, vol. 18, May 1, 1979, p. 1360-1362.
Physics
Optics
4
Flux Quantization, Light Beams, Nonlinear Optics, Optical Measurement, Photometers, Apertures, Mirrors, Photomultiplier Tubes, Signal Analysis
Scientific paper
An apparatus is described for determining the deviations from linearity between incoming flux and the signal of a photometric device. The device whose linearity is to be measured is exposed to the exit light beam of the linearity apparatus. The exit beam comes from a screen onto which an arbitrary but stable light source is imaged by a concave mirror. The essential part of the apparatus is a set of 11 apertures in front of the mirror. The apparatus described allows an easy measurement of the overall relation between flux and signal over a range of several decades. The response curve is formed exclusively from flux ratio measurements close to 1.0, with the result that the determination of a possible nonlinearity cannot be affected by the nonlinearity itself.
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