METHOD AND DEVICE FOR VIBRATIONAL CIRCULAR DICHROISM SPECTROSCOPY

摘要

A circular polarisation spectrometer is disclosed comprising a source (1) of essentially monochromatic electromagnetic radiation preferably in the infrared range, an element (21, 37-45) for the generation of altematingly left and right circularly polarised radiation therefrom, and at least one detector (7) for detecting radiation transmitted by a sample to be analysed spectroscopically in terms of differential absorption of left and right circularly polarised radiation. The spectrometer is versatile and allows compensation of almost any otherwise detrimental offset effects if the element (21, 37- 45) for the generation of altematingly left and right circularly polarised radiation is an electro-optical device in which by means of the application of voltage and a correspondingly generated electric field the birefringence can be adapted as a function of time.