Patent ID: 7349103
Filing Date: 2008-03-25
Classification: G01J,G01N

Abstract:
1. An apparatus for examining features of a sample with a broadband beam, said apparatus comprising: a) a long-wavelength source for emitting a long-wavelength radiation; b) a short-wavelength source for emitting a short-wavelength radiation; c) a passage between said long-wavelength source and said short-wavelength source; d) a reflective beam combining optics for shaping said long-wavelength radiation to enter said short-wavelength source via said passage, and for shaping said short-wavelength radiation exiting through said passage to re-enter said short-wavelength source via said passage, thereby combining said long-wavelength radiation and said short-wavelength radiation into said broadband beam exiting said short-wavelength source; e) a beam steering optics for projecting said broadband beam to a spot on said sample; f) a beam intercepting optics for intercepting a scattered broadband radiation from said spot to produce a broadband signal beam; g) a sampling pinhole for passing a test portion of said broadband signal beam corresponding to a center portion of said spot; and h) a detector for examining said test portion.