Patent ID: 9110033
Filing Date: 2015-08-18
Classification: G01N,G06T,Y10T

Abstract:
1. An optical collection system for use in a surface inspection system for inspecting a surface of a workpiece, the surface inspection system having an incident beam projected through a back quartersphere and toward a desired location on the surface of the workpiece to impinge thereon to create reflected light, extending along a light channel axis in a front quartersphere, and scattered light, the incident beam and the light channel axis forming an incident plane, the optical collection system comprising: a wing collector positioned to collect a first portion of the scattered light, the wing collector being disposed in the front quartersphere, outside the incident plane, and at a maximum of a signal to noise ratio when the incident beam is P-polarized; and at least one of the following collection elements: a light channel collector positioned in the incident plane to simultaneously receive the reflected light or a front collector disposed in the front quartersphere and positioned to simultaneously collect a second portion of the scattered light.