Patent ID: 6677769
Filing Date: 2004-01-13
Classification: G01R

Abstract:
An electro-optic field-mapping system for scanning at least a near field electric pattern of a workpiece to be tested while operating in a steady-state, continuous-wave, condition comprising:means for generating an optical signal; an electro-optic field-mapping sensor including an electro-optic crystal having a high-reflective coating of multiple dielectric layers and mounted on an end of an optical fiber for receiving the generated optical signal, and the multiple dielectric layers of the sensor for generating a reflected optical signal in response to a free-space electromagnetic field associated with a workpiece to be tested passing through the sensor changing an index of refraction of the sensor and polarization of the optical signal being reflected to directly achieve at least one dimensional frequency domain, steady-state, electric field distribution mapping simultaneously for amplitude and phase in at least a near field electric pattern; means for sensing polarization modulation of the reflected optical signal; and means for evaluating the workpiece to be tested by analyzing the polarization modulation of the reflected optical signal.