Patent ID: 7061626
Filing Date: 2006-06-13
Classification: G01B,G02B,G03H

Abstract:
1. A method of manufacturing an optical element having an optical surface of a target shape, the method comprising: generating a beam of measuring light traversing a beam deflector and a hologram, wherein the beam deflector deflects the beam of measuring light by more than 0.15°, such that measuring light having traversed the beam deflector and the hologram is incident on the optical surface, wherein a deflection angle between an average direction of the measuring light incident on the hologram and an average direction of the measuring light emerging from the hologram is greater than 0.25°, and wherein an average direction of the measuring light incident on the beam deflector is substantially parallel to the average direction of the measuring light emerging from the hologram; performing at least one interferometric measurement by superimposing reference light with at least a portion of the measuring light having interacted with the optical surface; determining deviations of the optical surface from the target shape based on the at least one interferometric measurement; and processing the optical surface of the optical element based on the determined deviations.