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

Claim 0:
1. 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; and
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 first beam splitter and a second beam splitter positioned in the light path;
a first dove prism;
a first lens and a second lens, wherein the first beam splitter is configured to direct the light path through the first lens and the second beam splitter is configured to direct the light path through the first dove prism and the second lens;
a first detector operable to detect the light path from the first lens; and
a second detector operable to detect the light path from the second lens; and

a controller configured to be in communication with the first detector and the second detector such that in operation when the controller is in communication with the first detector and the second detector the controller combines a first image detected by the first detector and a second image detected by the second detector to form a symmetric beam profile.