Optics: measuring and testing – Crystal or gem examination – Axes determination
Patent
1992-02-26
1994-03-29
Rosenberger, Richard A.
Optics: measuring and testing
Crystal or gem examination
Axes determination
356237, 356371, G01N 2188
Patent
active
052989631
ABSTRACT:
An apparatus for inspecting the surface of a sheet-like object has a movable stage with an object mounted thereon; a source for lighting the object on the stage, particularly by making a plurality of illumination lights respectively having different wavelengths incident on the surface of the object from respective predetermined directions; image pickup device for fetching the image of the object under illumination of the light as image data or the images of parts of the object as image data obtained on the respective different wavelengths; image data processing device for inspecting the image data for defects; and a device for synchronizing control either for flashing the light at a predetermined time interval just after the stage commences its movement, synchronously with fetching the image data or for flashing the light and simultaneously fetching the image data obtained on the respective different wavelengths, synchronously with the object on the stage reaching respective predetermined positions while moving the stage.
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Moriya Kazuo
Tsuzura Takayuki
Mitsui Mining & Smelting Co. Ltd.
Rosenberger Richard A.
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