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Method and apparatus for infrared spectrometry

Patent image
NRL

A Fourier-Transform Infrared (FTIR) spectrometer for operation in the mid- and long-wave infrared region (about 2-15 micron wavelengths) is disclosed. The FTIR spectrometer is composed of IR-transmitting fiber and uses a broadband IR source. A fiber stretcher is provided to provide a path difference between a first path and a second path having a sample associated therewith. Stretching of the fiber provides a path difference sufficient to generate an interferogram that can subsequently be analyzed to obtain information about a sample. A method for use of the apparatus of the invention is also disclosed. The method involves stretching of an IR-transmitting fiber to create a path difference sufficient to generate an interferogram. Various aspects of these features enable the construction of compact, portable spectrometers.

Inventors: 
Shaw, Leslie Brandon; Sanghera, Jasbinder S.; Aggarwal, Ishwar D.
Patent Number: 
Technical domain: 
Sensors and Measurement
FIle Date: 
2006-05-18
Grant Date: 
2011-05-10
Grant time: 
1,818 days
Grant time percentile rank: 
33
Claim count percentile rank: 
6
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY