Method of measuring the flowing of a material

Details Method of measuring the flowing of a material Method of measuring the flowing of a material

1987-08-26

1989-03-21

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

374161, G01B 902

Patent

active

048137812

ABSTRACT:
In a method for measuring the flowing of the material, the following steps: forming an array of parallel strips of said material constituting a diffraction grating; submitting said grating at the same conditions as the material, the flowing of which is to be monitored; illuminating the grating by a single wavelength light beam and observing the diffracted light.

REFERENCES:
patent: 3985444 (1976-10-01), Takashima et al.
patent: 4140397 (1979-02-01), Gara
patent: 4188123 (1980-02-01), Kleinknecht
patent: 4200396 (1980-04-01), Kleinknecht et al.
patent: 4525066 (1985-06-01), Guillaume et al.
K. Dorenwendt et al, "Dimensinal Metrology In Technics by Diffraction of Light", Laserelektrooptic, vol. 19, No. 3 (Sep. 1978): 16, 19.

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