PROCEDE ET DISPOSITIF DE PRELEVEMENT D'UNE PARTIE D'UN FAISCEAU LUMINEUX, NOTAMMENT POUR APPAREIL D'ANALYSE DE FLUORESCENCE

摘要

The invention relates to a method and device for sampling part of a light beam, particularly for a fluorescence analysis apparatus. According to the invention, at least one acousto-optic modulator (30) is positioned on the path of the beam and said modulator is activated in order to produce a diffracted beam (38) of the order of +1 or 1. The latter diffracted beam is subsequently sent to an optical apparatus (A) which only receives said beam when the modulator is activated. In this way, the modulator forms a shutter with respect to the apparatus. The aforementioned apparatus is intended to take measurements and the beam of the order of 0 is used as the reference beam in order to correct said measurements.