Electro-optical sensing apparatus and method for characterizing free-space electromagnetic radiation
US5952818A · kind A · utility
43Cited by
17References
34Claims
0Family size
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Key dates
| Filing date | Oct 25, 1996 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Oct 25, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/0885
- 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 field and a laser beam in an electro-optic crystal. In addition to a pratical 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.