发明名称 |
Long wavelength infrared detection and imaging with long wavelength infrared source |
摘要 |
<p>An infrared detection system comprises the following elements. A laser source provides radiation for illuminating a target (5). This radiation is tuned to at least one wavelength in the fingerprint region of the infrared spectrum. A detector (32) detects radiation backscattered from the target (5). An analyser determines from at least the presence or absence of detected signal in said at least one wavelength whether a predetermined volatile compound is present. An associated detection method is also provided. In embodiments, the laser source is tunable over a plurality of wavelengths, and the detector comprises a hyperspectral imaging system. The laser source may be an optical parametric device has a laser gain medium for generating a pump beam in a pump laser cavity, a pump laser source and a nonlinear medium comprising a ZnGeP2 (ZGP) crystal. On stimulation by the pump beam, the ZnGeP2 (ZGP) crystal is adapted to generate a signal beam having a wavelength in a fingerprint region of the spectrum and an idler beam having a wavelength in the mid- infrared region of the spectrum. The laser gain medium and the ZnGeP2 (ZGP) crystal are located in the pump wave cavity.</p> |
申请公布号 |
AU2013308186(A1) |
申请公布日期 |
2015.04.09 |
申请号 |
AU20130308186 |
申请日期 |
2013.08.30 |
申请人 |
ITI SCOTLAND - SCOTTISH ENTERPRISE |
发明人 |
MALCOLM, GRAEME;ROBERTSON, GORDON |
分类号 |
G01N21/35 |
主分类号 |
G01N21/35 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|