Optical roller wave gauge

Details Optical roller wave gauge Optical roller wave gauge

1991-06-07

1993-10-05

Rosenberger, Richard A.

Optics: measuring and testing

By polarized light examination

With light attenuation

356239, 356445, 250571, G01B 1130, G01N 2186

Patent

active

052510107

ABSTRACT:
An optical roller wave gauge for inspecting glass sheets processed on a horizontal roller hearth to determine roller wave distortion thereon includes a light source mounted to direct two parallel beams of light separated by a predetermined first distance onto the glass sheet, light detection means mounted to receive the two beams reflected from the surface of the glass sheet, first logic for determining the second distance between the beams at the light detection means, memory for storing a preselected number of second distances determined by the first logic, and second logic for retrieving the preselected number of stored second distances and generating a quality value representing the surface distortion on that portion of the glass sheet over which the preselected number of second distances was determined.

REFERENCES:
patent: 3591293 (1970-03-01), Maltby
patent: 3788750 (1974-01-01), Maltby, Jr. et al.
patent: 4255055 (1981-03-01), Schave
patent: 4585343 (1986-04-01), Schave et al.
patent: 4781465 (1988-11-01), Demachi et al.
patent: 4853777 (1989-08-01), Hupp
patent: 4929846 (1990-05-01), Mansour
patent: 5122672 (1992-06-01), Mansour

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