Patent ID: 6462815
Filing Date: 2002-10-08
Classification: G01N,G02B

Abstract:
A device for optically inspecting a plurality of surfaces, the plurality of surfaces including at least a first surface and a second surface, the first surface differing from the second surface, the device comprising:a beam splitter for splitting an input radiation in to a first measuring radiation and a second measuring radiation, the first measuring radiation being directed toward and being reflected by the first surface as a first reflected measuring radiation, the second measuring radiation being directed toward and being reflected by the second surface as a second reflected measuring radiation, and the first measuring radiation exhibiting a first property that differs from a second property exhibited by the second measuring radiation, and the beam splitter combining the first reflected measuring radiation and the second reflected measuring radiation into an output radiation; a first radiation receptor; a second radiation receptor; and an optical measuring device having a semitransparent mirror, the optical measuring device receiving the output radiation, and the semitransparent mirror in the optical measuring device directing the first reflected measuring radiation of the output radiation toward the first radiation receptor and directing the second reflected measuring radiation of the output radiation toward the second radiation receptor.