Patent ID: 9606069
Date: 2017-03-28
CPC Classifications: G01N

Claim:
1. An inspection system comprising: an illumination source for generating a primary beam of illumination directed along a primary illumination direction; one or more actuatable polarized illumination deflection elements selectively actuatable into the primary beam of illumination, the one or more actuatable illumination deflection elements configured to direct a first portion of the primary beam of illumination having a first polarization along a first illumination direction in order to form a first inspection beam, the one or more actuatable illumination deflection elements further configured to direct a second portion of the primary beam having a second polarization orthogonal to the first polarization along a second illumination direction in order to form a second inspection beam, the second illumination direction different from the first illumination direction; and an objective configured to focus the first inspection beam having the first polarization onto a first region of a substrate, the objective further configured to focus the second inspection beam having the second polarization onto a second region of the substrate, the first region being spatially separated from the second region; and one or more image sensors, wherein the one or more image sensors are configured so as to separately collect illumination emanating from the first region of the substrate and illumination emanating from the second region of the substrate, wherein the illumination emanating from the first region of the substrate is non-interfering with the illumination emanating from the second region of the substrate.