Multi-wavelength raman imaging using a small-diameter image guide with a dimension-reduction imaging array.
A commercially available fiber-optic Raman probe was modified for high-resolution spectral Raman imaging using a 350 microm diameter optical fiber image guide coupled to a dimension-reduction imaging array (DRIA). The DRIA comprised 672 optical fibers, arranged as a square array (21 x 32 fibers) on one end and a linear array (672 x 1 fibers) on the other. An imaging spectrograph was used with the DRIA to acquire multi-wavelength Raman images from -250 to 1800 cm(-1) at a spectral resolution of approximately 5 cm(-1). The utility of this technique for in situ and remote Raman imaging is demonstrated by monitoring the polymerization of a model polymer, dibromostyrene (DBS), while simultaneously measuring the Raman Stokes/ anti-Stokes ratio as a function of sample heating time, over a sample area of approximately 4 x 1.6 mm.
Carter
J Chance
JC
Department of Chemistry and Biochemistry, University, of South Carolina, Columbia, South Carolina 29208, USA.
Scrivens
Wally A
WA
Myrick
M L
ML
Angel
S Michael
SM
D005336:Fiber Optic Technology; D005411:Flame Retardants / Q000032:analysis; D006842:Hydrocarbons, Brominated / Q000032:analysis; D007091:Image Processing, Computer-Assisted; D008853:Microscopy; D055100:Optical Fibers; D011108:Polymers / Q000032:analysis; D013059:Spectrum Analysis, Raman / Q000295:instrumentation* / Q000379:methods
D005411:Flame Retardants; D006842:Hydrocarbons, Brominated; D011108:Polymers