Method of measuring coherence of a light source and the light source coherence meter

摘要

the way is that the laser beam (a) in the ankle u015bwiatu0142odzielu0105cej (b) is divided into two beams.the first of which is a plate material with dynamic holo (d), and at the same time, increases the path length across the beamthe beam that is directed toward the mirror (c) and turns on a holo dynamic material (d), in which the interference both bundles a holographic image.after the plate material (d) illuminates a holo additional light source (e),and the resulting image holographic read detector (f), and record and analyse first-order diffraction intensity.which is proportional to the distance of coherence of light of the light source.meter, along the test light beam laser (a) has compiled a u015bwiatu0142odzielu0105cu0105 (b), a dynamic holo material (d) and the detector (f),at the same time, between u015bwiatu0142odzielu0105cu0105 (b) and a plate material with dynamic holo (d) is placed a mirror (c),in addition, shallow dynamic holo material (d) is ou015bwietlana by additional light source (e).