Patent ID: 7088458
Filing Date: 2006-08-08
Classification: G01J,G02B

Abstract:
1. An apparatus for measuring an optical imaging system, which comprises: an arrangement for combined wavefront and distortion measurement, comprising an object structure with an interferometry object structure for wavefront generation from illuminating light and a Moiré object structure for Moiré pattern generation, which are to be arranged simultaneously or alternatively on the object side, and an image structure with an interferometry image structure matched to the interferometry object structure and a Moiré image structure matched to the Moiré object structure, which are to be arranged simultaneously or alternatively on the image side, a spatially resolving detector unit which is arranged downstream of the image structure and has a first detector plane for the spatially resolving acquisition of interferometry wavefront information, and a second detector plane for the spatially resolving acquisition of Moiré image information for distortion measurement, or has an axially movable detector surface for the spatially resolving acquisition of interferometry wavefront information in a first axial position and for the spatially resolving acquisition of Moiré image information for distortion measurement in a second axial position.