IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0099684
(2002-03-15)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Lemaire Patent Law Firm, P.L.L.C.
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인용정보 |
피인용 횟수 :
6 인용 특허 :
23 |
초록
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A machine-vision system and method are described for simultaneously imaging different sides of an object. The system includes an imager and optics that images two or more views of the first side of the object and of the second side. The views of the first side and the views of the second side of the
A machine-vision system and method are described for simultaneously imaging different sides of an object. The system includes an imager and optics that images two or more views of the first side of the object and of the second side. The views of the first side and the views of the second side of the object are each from different angles. A divider background surface is placed near a major surface of the object to obtain separate images of features of the object on the first side of the object and on the second side. In one embodiment, the divider diffuses light to back light the features on the object on the first side and back light the features on the second side of the object. In some embodiments, the information obtained is used to fix manufacturing problems in a semiconductor fabrication plant.
대표청구항
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1. A machine-vision system for imaging an object, the object having a first side and a second side, the machine-vision system comprising:an imager having primary optical axis running from the imager to the object; andan optics apparatus that images two or more views of the first side of the object w
1. A machine-vision system for imaging an object, the object having a first side and a second side, the machine-vision system comprising:an imager having primary optical axis running from the imager to the object; andan optics apparatus that images two or more views of the first side of the object without interference from the second side of the object, wherein the two or more views of the first side include a first view along a direction substantially parallel to the primary optical axis, and a second view along a direction substantially perpendicular to the primary optical axis. 2. The system of claim 1, wherein the wherein, on the first side of the object, there are a plurality of electrical connections each having a surface that lies along a plane, and on the second side of the object, there are a plurality of electrical connections each having a surface that lies along the plane, and wherein the second view is of the object from along a direction that is substantially parallel to the plane. 3. The system of claim 1, wherein the optics apparatus further images two or more views of the second side of the object and wherein the two or more views of the second side of the object are from different angles, wherein the two or more views of the second side include a first view along a direction substantially parallel to the primary optical axis of the imager from the imager to the object, and a second view from along a direction substantially perpendicular to the primary optical axis and parallel to and opposite the direction of second view of the first side of the object. 4. The system of claim 1, wherein one of the views of the first side and the second side are within a single image on the imager. 5. The system of claim 4, wherein the single view is a top view of the object also showing opposing side views, each perpendicular to the top view, of the first side and the second side of the object. 6. The system of claim 5, further comprising an information-handling system that measures dimensions associated with the top view of the object and dimensions associated with the perpendicular side views of the object. 7. A machine-vision system for imaging an object, the object having a first side and a second side, the machine-vision system comprising:an imager; andan optics apparatus that images two or more views of the first side of the object without interference from the second side of the object, wherein the object includes a first major surface, the system further comprising a non-transparent divider background surface placed at or near the first major surface of the object in order to block, from one of the views of the first side of a portion of the object, some portion of the second side of the object, to obtain images of features of the object only on the first side of the object. 8. The system of claim 7, wherein the divider is opaque, the system further comprising:an LED lighting system that projects light from a plurality of LEDs onto the opaque divider. 9. The system of claim 7, wherein the divider background surface diffuses light to back light the features on the object on the first side and diffuses light to back light the features on the second side of the object. 10. The system of claim 7, wherein the divider comprises an elastomeric material. 11. The system of claim 7, wherein the divider is spring-loaded. 12. The system of claim 7, wherein the divider isolates the view of each one of four edges of a quad-flat-pack package from view of the other edges. 13. The system of claim 7, further comprising an information handling apparatus connected to the imager in order to receive image information from the imager, wherein the information handling apparatus determines co-planarity information of features of the object, and outputs data indicative of the co-planarity information. 14. A machine-vision system for imaging an object, the object having a first side and a second side, the machine-vision system comprising:an im ager; andan optics apparatus that images two or more views of the first side of the object without interference from the second side of the object, wherein the object includes at least a first major surface, the system further comprising a non-transparent divider background surface that contacts the first major surface of the object in order to block, from one of the views of the first side of a portion of the object, some portion of the second side of the object, to obtain separate images of features of the object only on the first side of the object and of features of the object only on the second side of the object. 15. The system of claim 14, wherein the divider is opaque. 16. The system of claim 14, wherein the divider background surface diffuses light to back light the features on the object on the first side and diffuses light to back light the features on the second side of the object. 17. The system of claim 14, wherein the divider is spring loaded to bias the divider against the object when the divider contacts the object. 18. The system of claim 14, wherein the divider includes an edge for contacting the major surface of the object, the edge of the divider initially forming an acute angle with respect to the major surface of the object. 19. The system of claim 18, wherein the divider is biased so that the edge of the divider is substantially in parallel with the major surface of the object after initially forming an acute with the major surface of the object. 20. The system of claim 14, wherein the object is moved both vertically and horizontally with respect to the major surface of the object. 21. The system of claim 20, further comprising a picker for picking and moving objects. 22. The system of claim 14, wherein one of the views of the first side and the second side are within a single image on the imager. 23. The system of claim 22, wherein the single view is a top view of the object showing the first side and the second side of the object. 24. The system of claim 23 further comprising an information-handling system that measures dimensions associated with the top view of the object from the obtained images. 25. The system of claim 14, wherein the divider comprises an elastomeric material. 26. The system of claim 14, wherein the divider is spring-loaded. 27. The system of claim 14, wherein the divider isolates the view of each one of four edges of a quad-flat-pack package from view of the other edges. 28. The system of claim 14, further comprising an information handling apparatus connected to the imager in order to receive image information from the imager, wherein the information handling apparatus determines co-planarity information of features of the object, and outputs data indicative of the co-planarity information. 29. The system of claim 28, further comprising a sorting apparatus connected to information handling apparatus in order to sort objects based on the co-planarity information. 30. A machine-vision system for imaging an object, the object having a first side and a second side, the machine-vision system comprising:an imager; andan optics apparatus that images two or more views of the first side of the object without interference from the second side of the object, wherein the optics apparatus includes an optical path folding optics that at least provides backlit and substantially orthogonal first and second views of the first side of the object and backlit and substantially orthogonal first and second views of the second side of the object, and includes a substantially non-transparent divider background surface placed in a relationship at or near the object in order to block, from one of the views of the first side of a portion of the object, some portion of the second side of the object;the system further comprising:an LED lighting system that projects light from a plurality of LEDs onto the divider; andan information handling apparatus connected to the imager in order to receive image informati on from the imager, wherein the information handling apparatus determines co-planarity information of features of the object using the image information from the first and second views of the first side of the object and the first and second views of the second side of the object, and outputs data indicative of the co-planarity information. 31. A machine-vision system for inspecting an object, the object having a first side and a second side, the machine-vision system comprising:an imager; andan optics apparatus that images a top-down view of the object that includes both the first side and the second side of the object, a separate first-side view of only the first side of the object and a separate second-side view of only the second side of the object, and wherein the first-side view is from along a direction substantially perpendicular to the direction of the top view, and the second-side view is from along a direction substantially perpendicular to the direction of the top view. 32. The machine-vision system of claim 31, wherein the optics apparatus includes a single camera that obtains the top-down view, the first side view and the second side view. 33. The system of claim 31, wherein the object includes at least one major surface, the machine vision system further comprising a divider background surface placed near the at least one major surface of the object in order to obtain the separate image of the first side of the object and the separate image of the second side of the object. 34. The machine-vision system of claim 31, wherein the optics apparatus further comprises:a first reflective surface for obtaining the separate view of only the first side of the object; anda second reflective surface for obtaining the separate view of only the second side of the object. 35. The machine-vision system of claim 31, further comprising:a base;at least one spring attaching the divider to the base; anda picker for picking and moving objects. 36. The machine-vision system of claim 35, wherein the picker moves the object at an angle with respect to an edge of the divider. 37. The machine-vision system of claim 31, wherein the top-down view of the object, the substantially perpendicular side view of the first side of the object, and the substantially perpendicular side view of the second side of the object are all backlit. 38. The machine-vision system of claim 31, wherein, the substantially perpendicular side view of the first side of the object and the substantially perpendicular side view of the second side of the object are both backlit. 39. The machine-vision system of claim 31, further including a measurement apparatus for determining dimensions on the top-down view of the object, the substantially perpendicular side view of the first side of the object, and the substantially perpendicular side view of the second side of the object. 40. A method for obtaining a machine-vision image of an object comprising:blocking a first portion of the object with a first illuminated surface; andimaging a second portion of the object using back light from the first illuminated surface. 41. The method of claim 40, further comprising:blocking the second portion of the object with a second illuminated surface; andimaging the first portion of the object using back light from the second illuminated surface. 42. The method of claim 41, further comprising imaging an outline of at least a portion of the object using back light from a third illuminated surface. 43. The method of claim 42, wherein the imaging using back light from the third illuminated surface is along a direction that is perpendicular to a direction used for the imaging of the first portion of the object. 44. The method of claim 41, further comprising:obtaining digitized image information about the first portion of the object and the second portion of the object;determining co-planarity information of features the first portion of the object and the second portion of the object using th e digitized image information; andoutputting data indicative of the co-planarity information. 45. The method of claim 44, further comprising:sorting the object into one of a plurality of output groups based on the co-planarity information. 46. The method of claim 40, further comprising elastomerically pressing the first illuminated surface against the object. 47. The method of claim 40, further comprising placing the first illuminated surface against the object.
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