<title>A Novel Summing Luminescence Spectrometer Employing Polychromators And Spatial Filtering</title>

Abstract

Luminescence methods have been established as very promising for continuous oil -in -water monitoring because of their high sensitivity and relative immunity to particulate backgrounds.The greatest problem with luminescence has been the highly variable response of different oil types. Previous studies have shown that it is possible to roughly equalize response to many oils by weighted summing of multiple emissions resulting from multiple excitations.The use of a large number of filter pairs or mechanically scanned monochromators is undesirable both because instrument response time is too long for a continuous monitor, and because the mechanical scanning of critical optical components does not lend itself to incorporation in a rugged shipboard instrument. This paper discusses an optical summing and weighting technique which retains the advantages of luminescence methods, retains a short response time, but eliminates mechanical scanning of wavelengths. The operation of the optical breadboard is discussed in terms of the oil -in -water problem.