Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1997-12-08
1999-07-20
Pham, Hoa Q.
Optics: measuring and testing
By polarized light examination
With light attenuation
3562375, 356375, 348126, 382151, G01B 1100
Patent
active
059262788
ABSTRACT:
A method of taking an image of a convex projection which projects from a plane and whose outer surface has a gloss, including the step of emitting, toward the outer surface of the convex projection, a plurality of lights in a plurality of directions, respectively, which differ from each other as viewed in a direction perpendicular to the plane, so that a plurality of base portions of the outer surface of the convex projection which face the plurality of lights, respectively, and each of which is adjacent to the plane are lighter than a remaining portion of the outer surface as viewed in the direction perpendicular to the plane, and the step of taking, using an image taking device, the image of the convex projection as viewed in the direction perpendicular to the plane.
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Fuji Machine Mgf. Co., Ltd.
Pham Hoa Q.
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