Patent ID: 7800747
Filing Date: 2010-09-21
Classification: G01N

Abstract:
1. An inspection apparatus comprising: a first light source including a first plurality of surface emitting laser elements which emit fundamental waves, respectively; a first illumination optical system configured to illuminate a first plurality of fundamental waves emitted from the first plurality of surface emitting laser elements on an object to be inspected; and a stage on which the object to be inspected is placed, wherein the first illumination optical system includes: a filter configured to attenuate a component in a predetermined wavelength region in the first plurality of fundamental waves; a first lens configured to converge the first plurality of fundamental waves components in the predetermined wavelength region of which are attenuated; a field stop configured to stop down a field of the first plurality of fundamental waves; an opening stop configured to stop down an opening of the first plurality of fundamental waves; and second and third lenses arranged in an optical axis direction to sandwich the opening stop.