Patent ID: 6288531
Filing Date: 2001-09-11
Classification: G01R

Abstract:
An electro-optic probe comprising:a probe body and a probe head mounted at the distal end of the probe body and to be movable relative to the length of said probe body;a laser diode disposed at the proximal end of said probe body for emitting a laser beam;an electro-optic element disposed in said probe head having a reflecting film formed on one surface of said electro-optic element for reflecting said laser beam;optical means including polarization light splitters forming an optical path between said laser diode and said reflecting film on said electro-optic element;a metal pin mounted to said probe head having one end protruding from said probe head to contact a test point to receive voltage and its other end in contact with another surface of said electro-optic element, the polarization of said electro-optic element being changed in response to the voltage;a plurality of photodiodes for receiving the laser beam reflected from said reflecting film on said one surface of said electro-optical element after being split by respective polarization light splitters and for converting the received light to electric signals; andresilient mounting means for mounting said probe head to the distal end of said probe body to effect movement of said probe head relative to said probe body along the length of said probe body in response to pressure applied to said metal pin and to restrict rotational displacement of said probe head relative to said probe body.