Patent ID: 7782449

Claim:
A method for analysing an optical device, comprising: a) arranging an illuminating device which generates a test beam, the optical device and a position-resolving sensor device which detects the test beam, relative to each other in a reference position, wherein the reference position establishes a reference beam path which comprises a first direction of the test beam transmitted in the reference position from the illuminating device and directed towards the optical device, and a second direction of the test beam received in the reference position from the sensor device after the test beam passes the optical device; b) arranging the test beam transmitted from illuminating device in a plurality of relative positions with respect to the reference position so that at least one of (i) the direction of the test beam is offset, in the respective relative position, with respect to the first direction, and (ii) the illuminating device and the optical device are offset, in the respective relative position, with respect to each other relative to the reference position, the test beam being incident upon a measuring point assigned to the respective relative position on the optical device; c) detecting, for a respective relative position, the position of incidence of the test beam after it passes the optical device, by the sensor device on a plurality of planes of detection offset relative to each other along the second direction; and d) determining the beam path of the test beam, after passing the optical device, from the positions of incidence detected in step c) for each relative position, and calculating optical characteristics of the optical device from the beam path; wherein at least one of the gradient field of the optical wave front, or the optical wave front, after passing the optical device, or values dependent on the optical wave front, are calculated from the beam paths of the test beams determined step d).