Spectroscopic Chemical Analysis Methods and Apparatus

Hug, William F [Inventor]Reid, Ray D [Inventor]Bhartia, Rohit [Inventor]Lane, Arthur L [Inventor]

关键词: SPECTROSCOPIC ANALYSIS;    CHEMICAL ANALYSIS;    ELECTRON BEAMS;    SEMICONDUCTOR LASERS;    ULTRAVIOLET SPECTRA;    RAMAN SPECTROSCOPY;    ACOUSTO-OPTICS;    RADIATION DETECTORS;    FLUORESCENCE;    PATENTS;    LIGHT EMITTING DIODES;    MONOCHROMATORS;   

RP-ID  :  US-Patent-9,915,603, US-Patent-Appl-SN-15/432,865

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Spectroscopic chemical analysis methods and apparatus are disclosed which employ deep ultraviolet (e.g. in the 200 nm to 300 nm spectral range) electron beam pumped wide bandgap semiconductor lasers, incoherent wide bandgap semiconductor light emitting devices, and hollow cathode metal ion lasers to perform non-contact, non-invasive detection of unknown chemical analytes. These deep ultraviolet sources enable dramatic size, weight and power consumption reductions of chemical analysis instruments. In some embodiments, Raman spectroscopic detection methods and apparatus use ultra-narrow-band angle tuning filters, acousto-optic tuning filters, and temperature tuned filters to enable ultra-miniature analyzers for chemical identification. In some embodiments Raman analysis is conducted along with photoluminescence spectroscopy (i.e. fluorescence and/or phosphorescence spectroscopy) to provide high levels of sensitivity and specificity in the same instrument.