Line-shape distortions in misaligned cube corner interferometers.

Line-shape distortions caused by the misalignment of the moving cube mirror in Fourier transform spectrometers have been described. A method of studying and correcting these distortions is presented. By using this method we can estimate the accuracy of the line position, which is especially important in high-resolution Fourier transform spectroscopy. The method is verified in simulations, and in practice it has been used to align the Oulu Fourier transform spectrometer.