HIGH ORDER FOCUS IN LASER RADAR TOOLING BALL MEASUREMENTS

摘要

Interrogation optical beams are focused or otherwise shaped for delivery to a target that includes one or more tooling balls so as to have a beam radius of curvature corresponding to a tooling ball radius. Focus values can be stored in a look-up table and can include two beam focus conditions that produce a selected beam focus. The two beam focus conditions are associated with a common beam curvature. The focus conditions are associated with beam curvatures within and without a Rayleigh range from a beam waist.

主权项

1. A method, comprising:
directing an interrogation optical beam to a target; and adjusting the interrogation optical beam based on a target feature so that a radius of curvature of the interrogation optical beam at a target surface corresponds to a target feature radius of curvature.