Infrared high-resolution grating spectrometer

Abstract

An infrared grating spectrometer which can be used as a singJe-or double-pass instrumen t has been built a.nd set in operation . . The collima~ing mirror has a focal length of 235 centimeters and the mstrument has the highest resolutIOn from 1 600 to 3 500 em-I. In order to have fie;xibility i~ scanning t he spectra at different speeds,' a s peci~l drive mechanism has been bUilt w:luch IS made of spur g~ars and worm gears. The speeds range from 2.5 to 200 mmutes of t ilne p er degree of rotatIOn . Examples of the s pectra resolved bv the illstrument are given. Lines separated by 0.05 c m-I are completely resolved and two Jines sc paratrd by 0.025 cm-I are partially resol ved .