3D inspection using cameras and projectors with multiple-line patterns
First Claim
1. An apparatus for optical inspection of integrated circuits, comprising:
- a photographic system placed above a scene on a plane defined by a first direction and a second direction, the photographic system comprising a plurality of digital cameras (22) each comprising an orthogonal array of pixels, all of the digital cameras having their respective optical axes inclined by a first non-zero angle (β
) with respect to a third direction (Z) perpendicular to the plane defined by the first direction and the second direction, each of the digital cameras being coplanar in another plane parallel to the plane defined by the first and second directions; and
two projectors (24) projecting determined patterns, each of these patterns comprising a plurality of parallel lines in only one direction and being such that two straight lines respectively from the plurality of parallel lines projected by the projectors are aligned in the plane of the scene and the two straight lines are coplanar with a straight line (242) interconnecting the optical centers of the two projectors, the two straight lines forming one contiguous line,wherein each camera of a first subset of the plurality of digital cameras is aimed at a first point and each camera of a second subset of plurality of digital cameras is aimed at a second point,and wherein an image processing system is capable of applying a super-resolution processing to a succession of images provided by the photographic system.
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Accused Products
Abstract
An installation of optical inspection of integrated circuits or the like includes a photographic system placed above a scene in a plane defined by a first and a second direction, the photographic system having several digital cameras each having an orthogonal array of pixels, all cameras having their respective optical axes inclined by a first angle with respect to a third direction perpendicular to the two others; and two projectors of determined patterns, these patterns being such that two straight lines projected by each of the projectors are aligned in the plane defined by the first two directions and are coplanar with a straight line interconnecting the optical centers of the two projectors.
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Citations
8 Claims
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1. An apparatus for optical inspection of integrated circuits, comprising:
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a photographic system placed above a scene on a plane defined by a first direction and a second direction, the photographic system comprising a plurality of digital cameras (22) each comprising an orthogonal array of pixels, all of the digital cameras having their respective optical axes inclined by a first non-zero angle (β
) with respect to a third direction (Z) perpendicular to the plane defined by the first direction and the second direction, each of the digital cameras being coplanar in another plane parallel to the plane defined by the first and second directions; andtwo projectors (24) projecting determined patterns, each of these patterns comprising a plurality of parallel lines in only one direction and being such that two straight lines respectively from the plurality of parallel lines projected by the projectors are aligned in the plane of the scene and the two straight lines are coplanar with a straight line (242) interconnecting the optical centers of the two projectors, the two straight lines forming one contiguous line, wherein each camera of a first subset of the plurality of digital cameras is aimed at a first point and each camera of a second subset of plurality of digital cameras is aimed at a second point, and wherein an image processing system is capable of applying a super-resolution processing to a succession of images provided by the photographic system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification