Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1979-05-11
1981-03-10
Anderson, Bruce C.
Optics: measuring and testing
By polarized light examination
With light attenuation
356239, G01B 1130
Patent
active
042550556
ABSTRACT:
An inspection system for detecting the flatness of planar glass sheets or other materials having reflective surfaces by observing areas of preselected size on the surfaces. The system includes a collimated beam of light directed toward the surface of the sheet material wherein the collimated beam is split into two pairs of beams superimposed one upon the other at right angles for indicating contour in two directions along perpendicularly oriented axes of the observed area. The indication of flatness is obtained by presetting the spacing between the beams of each pair of beams directed against sheet material and noting any change in the spacing occurring between the reflected beams of each pair of beams. A light beam detector, positioned in the path of each of the pair of reflected beams so as to intercept the reflected beams, detects any change in spacing occurring between the beams of each pair of reflected beams and generates a series of signals in response thereto. The signals from the light beam detectors are processed and integrated into a predetermined logic indicative of the contour of the observed area of the sheet surface for comparison to a like logic for a prescribed surface flatness.
REFERENCES:
patent: 3667846 (1972-06-01), Nater et al.
patent: 3788750 (1974-01-01), Maltby
Anderson Bruce C.
Libbey-Owens-Ford Company
LandOfFree
Surface inspection system for detecting flatness of planar sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface inspection system for detecting flatness of planar sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface inspection system for detecting flatness of planar sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1291758