PLATE GLASS DEFECT DETECTOR, PLATE GLASS MANUFACTURING METHOD, PLATE GLASS ARTICLE, PLATE GLASS QUALITY DETERMINATION DEVICE, AND PLATE GLASS INSPECTION METHOD

摘要

PROBLEM TO BE SOLVED: To quickly, effectively and precisely detect various defects generated in an inside of a plate glass or on a surface thereof.

SOLUTION: This plate glass defect detector 10 is provided with a light source 20 and a photoreception device 30 arranged in opposite positions with the plate glass G therebetween. The plate glass G has translucent faces Ga, Gb opposed each other along a thickness direction thereof, and is arranged between the light source 20 and the photoreception device 30 to incline the translucent faces Ga, Gb by a prescribed angleαwith respect to an optical axis Lx of an optical system of the glass plate defect detector 10. The photoreception device 30 and the plate glass G are arranged with such a positional relationship that a focal distance F of a lens system 31 of the photoreception device 30 is smaller than a distance Z from a photoreception element of the photoreception device 30 up to the plate glass G, on the optical axis Lx.

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