Instruments to measure the radiation field

All radiometric devices must convert infrared energy into electrical signals. The fundamental properties of infrared converters, commonly called detectors, are analyzed in Section 5.10. In Section 5.11 the operating principles, noise limitations, and several temperature to voltage conversion mechanisms of thermal detectors are treated. Properties and noise characteristics of quantum detectors are the subject of Section 5.12. In many cases radiometric instruments must be calibrated in intensity and wavenumber. For best results calibration techniques are part of the instrument design. Several calibration methods are treated and their merits discussed in Section 5.13. Finally, Section 5.14 deals with considerations encountered in the 

Chapter 5 is neither a listing of available instmments nor is it an instmction manual for the construction of such devices. Rather, this chapter is intended to provide the necessary background to make an intelligent choice of a particular instrumental technique in the pursuit of a specific scientific goal and to be able to assess instrumental effects in recorded data. 

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Instruments to measure the radiation field Table 5.8.1 Background-noise sources... 

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