Non-damaging flatness and thickness gauge for glass

Details Non-damaging flatness and thickness gauge for glass Non-damaging flatness and thickness gauge for glass

1994-07-05

1997-12-23

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

356382, 356394, G01B 1106, G01B 1130

Patent

active

057011788

ABSTRACT:
A gauging system is provided for measuring glass flatness and thickness, in which a glass sheet is accurately supported on a reference plane, and fiber optic sensors are lowered toward the glass to sense the location of the upper and lower surfaces of the glass sheet. The sensors send signals, which are representative of the locations of the surfaces, to a central processing unit which is used to calculate thickness and/or flatness of the glass sheet.

REFERENCES:
patent: 3940608 (1976-02-01), Kissinger et al.
patent: 4597785 (1986-07-01), Karbassiyoon et al.
patent: 4672200 (1987-06-01), Claypool et al.
patent: 4853018 (1989-08-01), Koss et al.
Fiber Optic Lever Displacement Sensors and Automated Reflectance Compensation Improvements, by C. Kissinger, FOC/LAN 83, pp. 300-304.
Displacement Measurement by Fiber Optics by Curtis Kissinger, Apr. 1988, Measurement and Control.
Improved Noncontacted Fiber Optics/Lens Displacement Measuring System by Curtis Kissinger and Richard Smith, 1973.

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