scholarly journals Fiber-optic probe for noninvasive real-time determination of tissue optical properties at multiple wavelengths

2001 ◽  
Vol 40 (7) ◽  
pp. 1155 ◽  
Author(s):  
Jan S. Dam ◽  
Carsten B. Pedersen ◽  
Torben Dalgaard ◽  
Paul Erik Fabricius ◽  
Prakasa Aruna ◽  
...  
Keyword(s):  
Optical Properties ◽  
Real Time ◽  
Fiber Optic ◽  
Fiber Optic Probe ◽  
Tissue Optical Properties ◽  
Multiple Wavelengths ◽  
Time Determination ◽  
Optic Probe

Precise Determination of Percent Cure of Epoxide Polymers and Composites via Fiber-Optic Raman Spectroscopy and Multivariate Analysis

1997 ◽  
Vol 51 (2) ◽  
pp. 247-252 ◽  
Author(s):  
Jeffrey F. Aust ◽  
Karl S. Booksh ◽  
Christopher M. Stellman ◽  
Richard S. Parnas ◽  
Michael L. Myrick
Keyword(s):  
Raman Spectroscopy ◽  
Multivariate Analysis ◽  
Real Time ◽  
Fiber Optic ◽  
Precise Determination ◽  
Probe Design ◽  
Epoxide Polymers ◽  
Time Determination

A method for real-time determination of the percent cure of epoxies via in situ fiber-optic Raman spectroscopy has been developed. This method utilizes a probe design developed for real-time monitoring of polymer curing and multivariate analysis to interpret the data and determine percent cure. This method was demonstrated to be reliable to ±0.54% of cure in laboratory samples over a 50–99% cure range. A preliminary study measuring cure percentage in an industrial, glass-reinforced composite has been shown to be reliable to ±0.82% in the 40–90% cure range.

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