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Device for measuring electric current by use of electro-optical crystal

  • US 6,573,699 B1
  • Filed: 09/12/2000
  • Issued: 06/03/2003
  • Est. Priority Date: 10/05/1999
  • Status: Expired due to Fees
First Claim
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1. A device for measuring an electric current of a target circuit, comprising:

  • a pair of contact pins;

    a first resistor electrically connected between said contact pins, a voltage drop appearing between said contact pins when said contact pins direct the electric current to said first resistor; and

    an electro-optical crystal electrically connected between said contact pins in parallel with said first resistor, said electro-optical crystal having a voltage responsive to said voltage drop, wherein said voltage of said electro-optical crystal changes a polarization of a light beam passing through said electro-optical crystal, measuring the electric current between said contact pins on the basis of said change of the polarization.

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