Electro-optical voltage detector

Details Electro-optical voltage detector Electro-optical voltage detector

1988-06-08

1989-08-08

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

324 96, 350385, 356368, G01R 1900

Patent

active

048555916

ABSTRACT:
A voltage detector detects a voltage developing in a selected area of an object such as an integrated circuit by utilizing an electro-optic material equipped in an optical probe. A change in refractive index of the electro-optic material which is caused by the voltage in the object, is detected as a change of polarization of a light beam passing through the electro-optic material. In order to stably trigger a streak camera, the first reference light split before entering the electro-optic material and the second reference light split after emerging from the electro-optic material are used in the form of the difference in intensity between the two reference light beams for generating a trigger signal supplied to the streak camera.

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