Abstract

A description of the quantometer, a direct reading instrument for spectrochemical analysis is presented in this paper. The spectrometer equipped with movable receivers is discussed from the standpoint of basic optical, mechanical, and electrical design. An arrangement of four bridges with three receivers on each, allows up to twelve receivers to be moved and positioned so as to receive light from a great variety of line arrays in the spectrum range covered by the instrument. The limitations in this respect are presented for instruments utilizing 24,400 line per inch gratings and 36,600 line per inch gratings, both with a 1.5 meter radius of curvature. The basic electrical circuits and constants are given in detail for the receiver units, the low and high voltage power supplies, the sensitivity controls, and the recorders. The recording console is described especially with regard to the interchangeable panel method of direct reading, suitable for the analysis of a wide variety of alloys of the same base material. General operating methods are discussed in some detail. Adjusting and testing the instrument are explained and the precision of the unit as a light-measuring device is indicated.

© 1948 Optical Society of America

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