Method and apparatus for the detection of terahertz radiation absorption
US7230244B2 · kind B2 · utility
23Cited by
3References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 2004 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Jan 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3581
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is a method and apparatus for the detection of terahertz radiation. In one embodiment, frequency modulated spectroscopy is performed on a swept source of coherent far infrared electromagnetic radiation that is focused on a target. A beam of radiation passes through a cell in which the target is housed, losing energy as certain frequencies are absorbed by contaminants in the target. A detector is positioned to determine how much energy is lost by the radiation (e.g., which frequencies fail to transmit through the cell), thereby indicating the presence of contaminants in the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.