Apparatus for controlling and monitoring the dispersive element and recording instrument in spectrometric apparatus

Claim 1

A spectrometer including a rotatable dispersive element, a stepping motor for varying the angular position of said dispersive element, a program transmitter for controlling said stepping motor, a timing pulse generator, and a recording instrument, (a) said program transmitter comprising a register, in the positions of which are stored the values of a function representing the non-linear relationship of the angular position of the dispersive element to the wavelength or wavenumber, respectively, (b) said timing pulse generator being connected to said register for addressing each one of the positions thereof, (c) adjusting means for adjusting the stepping motor corresponding to the contents of the addressed register positions, respectively, and (d) said timing pulse generator also being connected to a recording instrument for controlling the advance thereof in the abscissa direction.