DEVICE FOR DETERMINING THE PROPERTIES OF AN OPTICAL SYSTEM

摘要

The invention concerns a device for measuring the properties of an optical system. It is characterized by: a light source (10, 12) for emitting a coherent light beam in a predetermined direction; a diffusing planar surface (14), opposite the emitted beam and intersecting said direction so as to be illuminated by a coherent plane wave, wherein said diffusing surface provides a light source formed of spots with near-random properties; means for fixedly arranging the optical system beyond said surface so that its axis coincides substantially with the direction of the beam; means (20, 26) for acquiring an image of the beam emitted by said source, said beam having travelled through said optical system; and means (28) for analysing and processing said image so as to determine the properties of the optical system.