Patent ID: 11913776
Assignee: APPLIED MATERIALS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A system, comprising:
a stage having a substrate support surface, the stage coupled to a stage actuator configured to move the stage in a scanning path and rotate the stage about an axis;
an optical arm coupled to an arm actuator configured to scan the optical arm and rotate the optical arm about the axis, the optical arm having:
a light source, the light source emitting a light path operable to be projected to a substrate disposed on the substrate support surface;
a dove prism positioned in the light path between the light source and the substrate support surface, the dove prism configured to rotate to project a first image and a second image onto a first detector;
a first beam splitter positioned in the light path;
a first lens, wherein the first beam splitter is configured to direct the light path through the first lens; and
the first detector operable to detect the light path projected from the first lens; and

a controller configured to be in communication with the optical arm having the dove prism and the first detector such that in operation the controller is configured to combine the first image and the second image to form a symmetric beam profile.