International Journal of Spectroscopy / 2014 / Article / Fig 1

Research Article

Optical Path Length Calibration: A Standard Approach for Use in Absorption Cell-Based IR-Spectrometric Gas Analysis

Figure 1

Schematic diagram of the setup used to calibrate the optical path length of a gas cell under test (CUT) with = 21 m (nominally). The reference cell has a nominal optical path length of 0.2 m. PD: photodiode. FP: Fabry-Perot etalon (removable).

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