Apparatus for the Measurement of Linear and Circular Dichroism in the Far Ultraviolet. Part 1: Characteristics of the Monochromator and of the Argon Mini-Arc Dispositif pour la Mesure du Dichroisme Lineaire et Circulaire dans l'Ul

摘要

A secondary standard light source was developed. The phase balancing method and the brightness conservation law were used to optimize a stigmatic grating device which matches exactly the spectrum of the source and which delivers well collimated output beams. The optical design of the dispersed source for absolute calibrations, using an argon mini-arc and a specially designed stigmatic normal incidence monochromator, is described. Such a device can also be used in microlithography (high flux in a limited passband being traded off for improved resolution), in photochemistry and in fluorescence measurements with simplified or speeded up detection systems.