Method of and apparatus for inspection of coatings on surfaces
First Claim
Patent Images
1. A method for inspecting coatings on a substrate, comprising the steps of:
- generating energy beams;
directing said beams toward both a sample coated substrate and at least one reference coated substrate to reflect beams therefrom as sample reflected beams and reference reflected beams respectively;
positioning an analyzer in the paths of both said sample reflected beams and said reference reflected beams to polarize said sample reflected beams and said reference reflected beams; and
comparing said polarized sample reflected beams and said polarized reference reflected beams to compare color variations on the sample coating and on the reference coating.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of and apparatus for inspecting reflective coatings on a substrate using a polaroid filter to view light reflected from the coating to make variations in coating thickness over a large coated area visible.
-
Citations
9 Claims
-
1. A method for inspecting coatings on a substrate, comprising the steps of:
-
generating energy beams; directing said beams toward both a sample coated substrate and at least one reference coated substrate to reflect beams therefrom as sample reflected beams and reference reflected beams respectively; positioning an analyzer in the paths of both said sample reflected beams and said reference reflected beams to polarize said sample reflected beams and said reference reflected beams; and comparing said polarized sample reflected beams and said polarized reference reflected beams to compare color variations on the sample coating and on the reference coating. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for inspecting coatings on a substrate, comprising the steps of:
-
generating energy beams; directing said beams toward at least one coated substrate to reflect said beams therefrom as reflected energy beams; positioning an analyzer in the path of said reflected energy beams to polarize said reflected energy beams; and visually observing said analyzer to detect color variations in the coating on the substrate. - View Dependent Claims (8)
-
-
9. Apparatus for inspecting coatings on a substrate, comprising:
-
a light source for generating light beams; means for directing said beams toward the coating to be inspected to provide reflected energy beams including at least a portion reflected from the upper surface of the coating; means for vertically polarizing said reflected light beams to provide polarized reflected beams; and means for recording image or shading pattern produced on said polarizing means by said reflected light beams passing therethrough.
-
Specification