Optical inspection station for detecting light-reflecting defects
First Claim
1. An optical inspection station to detect light-reflecting defects shown by a transparent or translucent hollow object driven in rotation about its axis of symmetry, the inspection station comprising:
- a lighting system able to supply a series of light beams illuminating one inspection area of the object at different angles of incidence,a camera equipped with a lens producing images of the inspection area during rotation of the object, the lens having a field angle,characterized in that the optical inspection station comprises a series of optical elements deflecting into air in a direction of the lens rays reflected by the one inspection area arranged between the one inspection area and the lens so as to divide the field angle of the lens into different areas, each area corresponding to a view of the one inspection area taken from different viewing angles, so as to form an image of the one inspection area, said image comprising a series of views of the one inspection area taken at different viewing angles, and wherein the optical elements are superimposed in a vertical direction to detect horizontal surface cracks.
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Abstract
The invention relates to an optical inspection station comprising: an illumination system capable of delivering a series of light beams illuminating an inspection region of the object at various angles of incidence; a camera equipped with a lens for producing images of the inspection region during rotation of the object; and a unit for analyzing and processing the images taken by the camera so as to detect the presence of reflecting defects in the images. According to the invention, the optical inspection station includes a series of optical elements for deflecting, in the air, rays reflected by the inspection region, these being placed between the inspection region and the lens so as to form, in each image, a series of views of the inspection region taken at different angles of viewing.
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Citations
11 Claims
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1. An optical inspection station to detect light-reflecting defects shown by a transparent or translucent hollow object driven in rotation about its axis of symmetry, the inspection station comprising:
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a lighting system able to supply a series of light beams illuminating one inspection area of the object at different angles of incidence, a camera equipped with a lens producing images of the inspection area during rotation of the object, the lens having a field angle, characterized in that the optical inspection station comprises a series of optical elements deflecting into air in a direction of the lens rays reflected by the one inspection area arranged between the one inspection area and the lens so as to divide the field angle of the lens into different areas, each area corresponding to a view of the one inspection area taken from different viewing angles, so as to form an image of the one inspection area, said image comprising a series of views of the one inspection area taken at different viewing angles, and wherein the optical elements are superimposed in a vertical direction to detect horizontal surface cracks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification
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- Resources
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Current AssigneeTiama
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Original AssigneeTiama
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InventorsGarin, Jean-Francois
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Primary Examiner(s)TORRENTE, RICHARD T
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Application NumberUS12/312,032Publication NumberTime in Patent Office3,758 DaysField of Search348135US Class CurrentCPC Class CodesG01N 21/8806 Specially adapted optical a...G01N 21/9054 Inspection of sealing surfa...
