Rapid Scan Infrared Spectrograph with Linear Wavelength Presentation*

A spectrometer has been developed which scans the infrared spectrum from 1 μ to 5.5 μ in 15 msec, 20 times/ sec. The spectra are recorded on 35 mm film with a linear wavelength presentation. The instrument was developed from the modification of a Perkin-Elmer model 99 monochromator. Principal emphasis is given to the development of a linear wavelength presentation with a method indicated for correcting the amplitude of the recorded spectra for all nonlinearities.