Patent ID: 7719674
Filing Date: 2010-05-18
Classification: G01N

Abstract:
1. A semiconductor inspection system configured to create an image of an object at a focal plane, the semiconductor inspection system comprising: an imaging assembly defining a focal plane; at least two two-dimensional detectors; and at least one splitting apparatus positioned to split the image of the object at the focal plane into a plurality of portions and direct at least one portion to a two-dimensional detector; wherein at least one point of the splitting apparatus is placed within the focal plane so that at least some light comprising part of the image of the object reaches the spatial location of the focal plane, the at least one splitting apparatus comprising; a plurality of reflective planes, the plurality of reflective planes defining an angle between each pair of planes, wherein at least one pair of the planes defines a gap through which at least one portion of the image passes to be focused on a two-dimensional detector, and each remaining portion of the image is directed by a respective reflective plane toward a different two-dimensional detector; and a single optical element comprising a plurality of reflective surfaces that each define a reflective plane and at least one non-reflective surface corresponding to the gap.