Patent ID: 9116044
Filing Date: 2015-08-25
Classification: G01J

Abstract:
1. A system for determining at least one characteristic of an illumination beam emanating from an illumination source, comprising: a substrate configured to receive illumination from an illumination source, the substrate including a plurality of apertures being spatially distributed along a selected scanning path to allow the illumination source to illuminate a selected number of apertures over a selected time interval, the plurality of apertures further being spatially offset from one another in a direction substantially perpendicular to the scanning path allowing a first portion of illumination having a first intensity level to pass through a first aperture and at least one additional portion of illumination having at least one additional intensity level to pass through at least one additional aperture; an actuator configured to actuate the substrate to move the plurality of apertures through an illumination beam emanating from the illumination source; a detector configured to receive at least a portion of illumination passing through at least one aperture of the plurality of apertures; and a computing system communicatively coupled to the detector, the computing system configured to: