par Balasse, Georges
Référence Spectrochimica Acta, 11, C, page (394-400)
Publication Publié, 1956
Article révisé par les pairs
Résumé : The use of photomultipliers has given the possibility of accurate measurements of luminous fluxes of low intensity. The recommended methods for reducing light intensities in a given way are now susceptible of rigid and thorough control. Several methods have been compared in this way and the working conditions of the most promising one, the method of rotating gauzes (grillages tournants) have been investigated. Under normal conditions the grids do not show an optically neutral behaviour: diffraction phenomena causing a reduction of the light generally increasing with increasing wave-length. Working conditions to eliminate this inconvenience in using the gauzes could be found. © 1956 Pergamon Press Ltd.