Apparatus for automatic measuring thermal dimensional change

Details Apparatus for automatic measuring thermal dimensional change Apparatus for automatic measuring thermal dimensional change

1985-09-17

1987-01-13

Yasich, Daniel M.

Boots, shoes, and leggings

250560, 356386, 374 55, G01B 1102

Patent

active

046369694

ABSTRACT:
An apparatus for automatic measuring thermal dimensional change from the room temperature to 2,000.degree. C., comprising, (a) means for supporting a specimen of the material to be tested and heating said specimen, (b) means for measuring the dimensional change of the specimen during heating said specimen, said measuring means having photo diode linear array and the telescopic lens for forming an image of the heated specimen, (c) means for illuminating the specimen from the opposite side of the photo diode linear array, said means having electric lamp and condensor lens, the radiation characteristic curve of said lamp being different from that of heated specimen, (d) means for separating the light forming image from the light radiated from said heated specimen, said means having light filter and neutral density filter between said specimen and said optical lens, (e) means for processing and calculating the video signal from the photo diode linear array indicating the results of measurements.

REFERENCES:
patent: 3433051 (1969-03-01), Parker
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patent: 4271477 (1981-06-01), Williams
patent: 4381152 (1983-04-01), Riech et al.
patent: 4426160 (1984-01-01), Couderc
patent: 4468136 (1984-08-01), Murphy et al.
patent: 4522510 (1985-06-01), Rosencwarg et al.
"Measurement of Thermal Expansion at High Temps by Laser Interferometry of Two Fibers", Review of Scientific Instruments, Hollenberg et al, vol. 47, 12/1976; pp. 1536-1541.
"An Automated Optical Dilatometer for Inhomogeneously Expanding Material" AIP Conference Proceedings (USA), Blankinship et al, No. 17; 1973; pp. 167-176.

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