The diagram given below is the representation of Fourier transform interferometer. Identify the missing block in the block diagram.
(a) Pyroelectric crystal
(b) Display
(c) High speed plotter
(d) A/D converter
This question was posed to me in an interview for job.
My question is based upon Fourier Transform Infra-red Spectrometers in section Colorimetry and Spectrometry of Analytical Instrumentation