Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1987-04-07
1989-06-27
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356345, 356355, G01B 902
Patent
active
048424102
ABSTRACT:
In a method of evaluating the thermal stability of hydrocarbon liquid fuels, the fuel flows over a heated tube that causes the fuel to decompose and deposit a residue as a film on the surface of the heated tube. The thickness of that residue film is a measure of the fuel's thermal stability. To measure the film's thickness, the film is illuminated with light that is substantially monochromatic. The light reflected from the surface of the heater tube interferes with the light reflected from the overlying surface of the residue film on that tube and thereby causes variations in the intensity of the reflected light. Those variations in intensity of the reflected light are detected to obtain a measure of the thickness of the film. In one embodiment of the invention, the heated tube is situated in an enclosed housing through which the fuel is caused to flow and the thickness measurement is made while the film builds up on the heated tube. In another embodiment of the invention, the film on the heater tube is evaluated after the complete thickness has been deposited.
REFERENCES:
patent: 3319515 (1967-05-01), Flournoy
patent: 3861804 (1975-01-01), Lehmbeck
patent: 4293224 (1981-10-01), Gaston et al.
patent: 4377343 (1983-03-01), Monson
patent: 4558950 (1985-12-01), Ulrich et al.
"In-Situ et al., Real-Time Thin Film Refractive Index and Thickness Monitor, " G. H. Hewig et al., IBM Technical Disclosure Bulletin, vol. 25, No. 1, Jun. 1982, pp. 436-438.
Darrah Shirley D.
DiGiusseppe Thomas G.
Kamin Richard A.
Marram Edward P.
Nowack Clarence
Geo-Centers, Inc.
McGraw Vincent P.
Turner S. A.
United States of America
LandOfFree
Apparatus and method utilizing interference fringes to determine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method utilizing interference fringes to determine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method utilizing interference fringes to determine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-808609