The External Experiment Module is an optical table that can be attached to any Agilent FTIR spectrometer for custom experiments, such as reflection and polarization modulation, grazing angle of thin films with photoelastic modulator, do-it-yourself accessories, and analysis of large samples. It features a large base plate, standard optical 1/4 x 20 drilled and tapped holes, magnetic surface, clear plastic purge cover, large orifices, and platforms for detector and sampling accessories.