METHOD AND APPARATUS FOR DETECTING DEFECT IN TRANSPARENT BODY
First Claim
1. A method for detecting a defect in a transparent body, the method comprising:
- disposing a transparent body to be examined between a light emitting unit and a light-receiving unit arranged opposite each other, a light-blocking object being arranged between the transparent body and the light-receiving unit; and
detecting a change in an optical path caused by a defect in the transparent body based on a change in a light ray emitted from the light emitting unit and being incident on the light-receiving unit after passing through the transparent body and the light-blocking object.
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Accused Products
Abstract
A quantitative, high-sensitivity examination of defects in a transparent product is realized, using a low-cost and space-saving optical dimension measuring apparatus to carry out measurement in a non-contact manner to avoid damaging the object of inspection and to avoid sensory examination. A transparent body to be examined is disposed between a light emitting unit and a light-receiving unit arranged opposite each other. A change in an optical path caused by a defect in the transparent body is detected based on a change in a light ray emitted from the light emitting unit and being incident on the light-receiving unit after passing through the transparent body and a light-blocking object disposed between the transparent body and the light-receiving unit.
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Citations
20 Claims
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1. A method for detecting a defect in a transparent body, the method comprising:
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disposing a transparent body to be examined between a light emitting unit and a light-receiving unit arranged opposite each other, a light-blocking object being arranged between the transparent body and the light-receiving unit; and detecting a change in an optical path caused by a defect in the transparent body based on a change in a light ray emitted from the light emitting unit and being incident on the light-receiving unit after passing through the transparent body and the light-blocking object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for detecting a defect in a transparent body, the device comprising:
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a light emitting unit; a light-receiving unit disposed opposite from the light emitting unit; a light-blocking object disposed between the light emitting unit and the light-receiving unit; and a controller configured to detect a change in an optical path caused by a defect in a transparent body to be examined based on a change in a light ray emitted from the light emitting unit and being incident on the light-receiving unit after passing through the transparent body and the light-blocking object, wherein the device is configured to arrange the transparent body between the light emitting unit and the light-blocking object. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification