Patent ID: 8368881

Claim:
An inspection system comprising: optics; an object support for mounting an object having a predetermined periphery shape in a region of an object plane of the optics; a bright-field light source; and an image detector having a radiation sensitive substrate disposed in a region of an image plane of the optics, wherein the optics provides an imaging beam path and a bright-field illumination beam path and comprises an objective lens, first, second and third lens groups, and a first field aperture arranged a) such that the following elements are arranged in the imaging beam path in the following order: the object plane, the objective lens, the second lens group and the radiation sensitive substrate, wherein an object field having a diameter greater than 300 mm is imaged onto the radiation sensitive substrate, and b) such that the following elements are arranged in the bright-field illumination beam path in the following order: the bright-field light source, the third lens group, the first field aperture, the second lens group, the objective lens and the object plane, wherein an illuminated field of the bright-field illumination beam path is located within the object field and has a diameter greater than 0.6 times a diameter of the object, wherein, at a periphery of the illuminated field, an illumination intensity rises from a value between 0.0005 and 0.010 times a maximum illumination light intensity within the object field to a value of more than 0.800 times the maximum illumination light intensity within a length of 3 mm to 6 mm.