Electro-optical and magneto-optical sensing apparatus and method for characterizing free-space electromagnetic radiation
US6111416A · kind A · utility
44Cited by
14References
20Claims
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Key dates
| Filing date | Aug 29, 1997 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Aug 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/13
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and methods for characterizing free-space electromagnetic energy, and in particular, apparatus/method suitable for real-time two-dimensional far-infrared imaging applications are presented. The sensing technique is based on a non-linear coupling between a low-frequency electric (or magnetic) field and a laser beam in an electro-optic (or magnetic-optic) crystal. In addition to a practical counter-propagating sensing technique, a co-linear approach is described which provides longer radiated field-optical beam interaction length, thereby making imaging applications practical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.