Optical component and magnetic-field sensor using superposed single crystal elements having different optical properties
US4984875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Jul 25, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical unit or an optical sensor through which a light beam is propagated in a predetermined direction, having 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 during propagation of the beam, and at least one second single crystal element each having a property of causing levorotation of the plane of polarization of the light beam. The first and second single crystal elements are superposed on each other in a direction perpendicular to the direction of propagation of the beam. The single crystal elements 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.