EP0353057A2
Expired / Lapsed
EP
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Optical component and magnetic-field sensor using superposed single crystal elements having different optical properties
Assignee: NGK Insulators Ltd
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Filing: 1989-07-27
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Granted: —
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Expires: 2009-07-27
Abstract
Abstract An optical unit or an optical sensor through which a light beam is propagated in a predetermined direction, having an optical component (2) which includes at least one first single crystal element (2R) each having a property of causing dextrorotation of a plane of polarization of the light beam during propagation of the beam, and at least one second single crystal element (2L) each having a property of causing levorotation of the plane of polarization of the light beam. The first and second single crystal elements (2R, 2L) are superposed on each other in a direction perpendicular to the direction of propagation of the beam. The single crystal elements (2R, 2L) may be bonded together by direct solid-solid reaction, or by diffusion of a material of a thin bonding film interposed between the adjacent single crystal elements. The single crystal elements also exhibit a magnetooptical or Faraday effect when used in a magnetic-field sensor, for example.
Inventors
- 👤 Hiroaki Minamikazoku Apartment Abe
- 👤 Shuhei Toyoda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/032; G01R33/0322; G02; G02F; G02F1/00; G02F1/01; G02F1/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
An optical unit through which a light beam is propagated in a predetermined direction, comprising an optical component which includes at least one first single crystal element each having a property of causing dextrorotation of a plane of polarization of the light beam propagated therethrough, and at least one second single crystal element each having a property of causing levorotation of the plane of polarization of said light beam, said at least one first single crystal element and said at least one second single crystal element being superposed on each other in a direction perpendicular to said predetermined direction of propagation of said light beam through said optical unit.
Claim 2
Dependent Claim
109 words
An optical unit through which a light beam is propagated in a predetermined direction, comprising an optical component which includes at least one first single crystal element each having a property of causing dextrorotation of a plane of polarization of the light beam propagated therethrough, and at least one second single crystal element each having a property of causing levorotation of the plane of polarization of said light beam, said at least one first single crystal element and said at least one second single crystal element being superposed on each other in a direction perpendicular to said predetermined direction of propagation of said light beam through said optical unit.
Claim 3
Dependent Claim
32 words
An optical unit according to claim 1, wherein said at least one first single crystal element and said at least one second single crystal element are bonded together by direct solid-solid reaction.
Claim 4
Dependent Claim
87 words
An optical unit according to claim 1, further comprising at least one bonding film each interposed between adjacent ones of said at least one first single crystal element and said at least one second single crystal element, and wherein said at least one first single crystal element and said at least one second single crystal element are bonded together by diffusion of a material of said each bonding film into said at least one first single crystal element and said at least one second single crystal element.
Claim 5
Dependent Claim
44 words
An optical unit according to claim 1, wherein each of said at least one first single crystal element and at least one second single crystal element consists of a single crystal selected from the group consisting of SiO₂, TeO₂, Pb₅Ge₃O₁₁, Bi₁₂SiO₂₀, Bi₁₂GeO₂₀, and Bi₁₂TiO₂₀.
Claim 6
Dependent Claim
136 words
An optical magnetic-field sensor for sensing a magnitude of a magnetic field, comprising a polarizer, an analyzer, and an optical component disposed between said polarizer and said analyzer in a direction of propagation of a light beam through the sensor, said optical component including at least one first single crystal element each having properties of causing dextrorotation of a plane of polarization of the light beam propagated therethrough and producing a magnetooptical effect, and at least one second single crystal element each having properties of causing levorotation of the plane of polarization of said light beam and producing a magnetooptical effect, said at least one first single crystal element and said at least one second single crystal element being superposed on each other in a direction perpendicular to said direction of propagation of said light beam.
Claim 7
Dependent Claim
136 words
An optical magnetic-field sensor for sensing a magnitude of a magnetic field, comprising a polarizer, an analyzer, and an optical component disposed between said polarizer and said analyzer in a direction of propagation of a light beam through the sensor, said optical component including at least one first single crystal element each having properties of causing dextrorotation of a plane of polarization of the light beam propagated therethrough and producing a magnetooptical effect, and at least one second single crystal element each having properties of causing levorotation of the plane of polarization of said light beam and producing a magnetooptical effect, said at least one first single crystal element and said at least one second single crystal element being superposed on each other in a direction perpendicular to said direction of propagation of said light beam.
References Cited (Backward Citations)
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