Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1990-08-14
1992-01-07
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
356446, G01B 1124
Patent
active
050784960
ABSTRACT:
This invention is a surface inspection system including a light source having a sharp edge between dark and bright and a video camera imaging this edge reflected from the surface. The light intensity of the light source is controlled using a light intensity sensor. An optical system focusses an image of the light source at the video camera with sufficient depth of focus to include the surface to be inspected. The exposure duration is set to prevent blurring if the surface to be inspected is moving. A surface quality computation apparatus computes at least one measure of surface quality, such as gloss, distinctness of reflected image and orange peel of the surface, from the video image signal. This surface quality computation apparatus preferably includes a frame grabber and a general purpose digital computer. Gloss is computed by determination of the maximum and minimum brightness slopes of the video image signal of the edge. Distinctness of reflected image is similarly computed and then corrected for the difference between the maximum brightness and minimum brightness of the video image signal. Orange peel is computed by determination of the periodicity variations of the positions of maximum and minimum brightness slope in the video image signal of the edge.
REFERENCES:
patent: H220 (1987-02-01), Vogel
patent: 3509349 (1970-04-01), Molines et al.
patent: 4629319 (1986-12-01), Clarke et al.
patent: 4717259 (1988-01-01), Suga
patent: 4792232 (1988-12-01), Jobe et al.
patent: 4847510 (1989-07-01), Douglas
Czubko Brian J.
Parker Jeffrey B.
Autospect, Inc.
Rosenberger Richard A.
LandOfFree
Machine vision surface characterization system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Machine vision surface characterization system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Machine vision surface characterization system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-817393