Self-Study Manual on Optical Radiation Measurements: Part 1. Concepts. Chapter 11. Linearity Considerations and Calibrations

摘要

This is the seventh in a series of Technical Notes (910- ) entitled 'Self-Study Manual on Optical Radiation Measurements'. In this chapter the author reviews the radiometric treatment of a non-linear radiometer. The emphasis is on the underlying radiometric principles and the experimental evaluation of a true response function so that such 'real' radiometer-output signals can be used in the idealized equations appropriate for linear radiometers. Several common techniques are discussed: beam addition, beam attenuation, the inverse-square law, and a number of other techniques in which non-radiometric measurements provide some or all of the basis for the response-function calibration. Many references are given; they should permit the reader to pursue the experimental details of any of the techniques in greater depth.