Abstract: A method and apparatus are provided for efficiently using 3-D vision systems to measure selected structural features of objects that have a uniform geometric arrangement. The method and apparatus are particularly well suited for optimizing the 3-D measurement of a multiple lead frame, leads of integrated circuit devices mounted on the multiple lead frame, and ball grid array integrated circuit devices on a wafer. For obtaining the three-dimensional data, corresponding sides of the multiple lead frames or devices are scanned sequentially in a row or column with at least one three dimensional sensor. This scanning procedure is repeated for all rows and columns containing structural features of the devices for which data are to be obtained. The acquired three-dimensional device geometry data are compared with the intended predetermined geometry to produce a signal indicative of a deviation of an actual device geometry from the intended predetermined geometry that exceeds a specified tolerance.

Abstract: Methods and arrangements are provided to efficiently use 3-D vision systems to measure selected features, of objects that are semi-constrained in compartmented trays having a uniform geometric arrangement. The methods are particularly well suited for optimizing the 3-D measurement of leads on integrated circuit devices which are packaged in trays. For obtaining the three-dimensional data, a multi-pocketed tray can be provided with tray pockets arranged in rows and columns, and corresponding sides of the multiple parts or devices in a row or column are scanned sequentially with at least one three dimensional sensor. This scanning procedure is repeated for all rows and columns containing sides of the devices from which data is to be obtained. The devices can be first aligned by applying directional vibration to the tray to drive all the parts or devices to the same corner or side of the respective pockets.

Abstract: A position sensing detector in which each of a plurality of sensing channels is provided with ends and an output current lead at each end of each channel. A light spot is imaged along the length of the channel. The channels are electrically isolated from each other. The channels may be proportional to a selected keystone pattern, and the channels may be rectangular-shaped and accommodate keystoning effects of an imaged beam.

Abstract: Methods and arrangements are provided to efficiently use 3-D vision systems to measure selected features, of objects that are semi-constrained in compartmented trays having a uniform geometric arrangement. The methods are particularly well suited for optimizing the 3-D measurement of leads on integrated circuit devices which are packaged in trays. For obtaining the three-dimensional data, a multi-pocketed tray can be provided with tray pockets arranged in rows and columns, and corresponding sides of the multiple parts or devices in a row or column are scanned sequentially with at least one three dimensional sensor. This scanning procedure is repeated for all rows and columns containing sides of the devices from which data is to be obtained. The devices can be first aligned by applying directional vibration to the tray to drive all the parts or devices to the same corner or side of the respective pockets.

Abstract: A scanning system inspects elements, such as ICs, continuously by positioning a second tray containing elements to be inspected adjacent a scan bed in which the elements in a first tray are being scanned. Immediately upon completion of scanning of elements in the first tray, scanning begins on elements in the second tray. During scanning of the second tray, the first tray is off loaded, and a third tray replaces the first tray. The cycle is repeated continuously. Since transport and scanning operations take place simultaneously, transport delay is reduced substantially, as compared to the serial system of the prior art. When the transport, positioning, and off loading operations consume substantially less time than the scanning operation, a fresh tray of elements always awaits scanning upon completion of scanning of elements in a tray.

Abstract: A scanning system inspects elements, such as ICs, continuously by positioning a second tray containing elements to be inspected adjacent a scan bed in which the elements in a first tray are being scanned. Immediately upon completion of scanning of elements in the first tray, scanning begins on elements in the second tray. During scanning of the second tray, the first tray is off loaded, and a third tray replaces the first tray. The cycle is repealed continuously. Since transport and scanning operations take place simultaneously, transport delay is reduced substantially, as compared to the serial system of the prior art. When the transport, positioning, and off loading operations consume substantially less time than the scanning operation, a fresh tray of elements always awaits scanning upon completion of scanning of elements in a tray.

Abstract: An arrangement for inspecting straightness of an array of pins in which the array is illuminated by a thin beam of light. Images of surfaces of the array of pins that are illuminated are projected on a photo-sensitive device. The array of pins is movable relative to the beam of light and the imaging device. The imaging device and photo-sensitive device are also movable relative to the array of pins.

Abstract: Methods and arrangements are provided to efficiently use 3-D vision systems to measure selected features, of objects that are semi-constrained in compartmented trays having a uniform geometric arrangement. The methods are particularly well suited for optimizing the 3-D measurement of leads on integrated circuit devices which are packaged in trays. For obtaining the three-dimensional data, a multi-pocketed tray can be provided with tray pockets arranged in rows and columns, and corresponding sides of the multiple parts or devices in a row or column are scanned sequentially with at least one three dimensional sensor. This scanning procedure is repeated for all rows and columns containing sides of the devices from which data is to be obtained. The devices can be first aligned by applying directional vibration to the tray to drive all the parts or devices to the same corner or side of the respective pockets.

Abstract: A position sensing detector in which each of a plurality of sensing channels is provided with ends and an output current lead at each end of each channel. A light spot is imaged along the length of the channel. The channels are electrically isolated from each other. The channels may be proportional to a selected keystone pattern, and the channels may be rectangular-shaped and accommodate keystoning effects of an imaged beam.

Abstract: An inspection system for irregular objects such as solder joints wherein the system utilizes first and second sensors adapted to be pivotable about a common pivot axis and such that the projection axes of the sensors and the pivot axes are able to intersect at a common.

Abstract: A practice for developing data for use in the three-dimensional location of the points on an object surface wherein first and second sensor means are used to cause first and second electromagnetic radiation to be directed at the object surface at first and second directions which are in a common plane.

Abstract: A system for object surface determination in which the projector/detector sensor of the system is controlled by a control detector which is responsive to a plurality of different parts of a portion of the reflected radiation being sensed by the projector/detector sensor.

Abstract: An arrangement for controlling a plurality of synchro receivers from a single command position. The system requires very little power relative to the torque produced in the controlled synchros. The desired synchro movement is achieved by selective interconnection of the stator terminals at appropriate times to effect desired rotation of the rotor.