Patent ID: 6462814
Filing Date: 2002-10-08
Classification: G01N,G01R

Abstract:
A optical probe system for optically probing an electrical device while operating the device under control of a tester of the kind operating to generate and apply a sequence of test vectors to the device and having a test head in which the device can be mounted, the optical probe system comprising:a light delivery and imaging module having imaging optics and a fine scanner and being configured to be docked to a test head; an optical processing subsystem operable to generate an incoming beam of light to illuminate the device; a data processing subsystem operable to generate control signals for the module and operatively coupled to transmit control signals to the module, the fine scanner having a frame and a platform and being coupled to receive control signals from the data processing subsystem to move the platform relative to the frame; and an optical fiber connected to transmit the incoming beam from the optical processing subsystem to a fiber end in the module; wherein the imaging optics have an optical axis, the fiber end is mounted in a fixed position on the optical axis so that light emitted from the fiber end is focused at a focal point in a focal plane by the imaging optics, and the fiber end and imaging optics are mounted in a fixed position to the platform of the fine scanner, whereby operating the fine scanner moves the fiber end, the imaging optics, the optical axis, and the focal point as a rigid unit.