×

Fiber optic magnetic field sensor

  • US 4,554,449 A
  • Filed: 04/28/1983
  • Issued: 11/19/1985
  • Est. Priority Date: 04/30/1982
  • Status: Expired due to Term
First Claim
Patent Images

1. A fiber optic magnetic field sensor comprising:

  • a light emitting optical fiber, having a light emitting end, for guiding an input light beam;

    a light receiving optical fiber, having a light receiving end, for guiding an output light beam;

    A first rutile plate having a first polarization axis, said first rutile plate having one side surface attached to the light emitting end of said light emitting optical fiber, and a second side surface;

    a second rutile plate, having a second polarization axis making an angle with respect to said first polarization axis, juxtaposed to said first rutile plate, said second rutile plate having one side surface attached to the light receiving end of said light receiving optical fiber, and a second side surface, said one side surfaces of said first and second rutile plates each facing the same direction;

    a rod lens having one end attached to the second side surfaces of both said first and second rutile plates, and a second end;

    a Faraday material member having one end surface attached to the second end of said rod lens, and a second end surface; and

    a reflecting means, attached to the second end surface of said Faraday material member, for reflecting the input light beam toward said light receiving end of said light receiving optical fiber as the output light beam.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×