Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1987-02-20
1988-04-19
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
295663, 250224, G01N 2188
Patent
active
047391758
ABSTRACT:
An apparatus for inspecting the configuration of terminal legs of an electronic device comprises a support base for supporting the electronic device to be inspected and a distance sensor, disposed at a predetermined distance from the electronic device, for measuring the distance to a particular point on a predetermined path across the terminal legs of the electronic device by a beam of light. The distance sensor provides an output signal representative of the distance between the sensor and the point on the predetermined path across the terminal legs. The apparatus also comprises drive mechanism for moving the distance sensor and the electronic device relative to each other at a predetermined speed along the predetermined travel path, thereby to move the beam of light across the terminal legs of the electronic device to be inspected so that the distance sensor can provide an output signal indicative of a measured profile of the terminal legs of the electronic device along the predetermined path. The apparatus further comprises a signal processing circuit including a reference signal generator for generating a reference signal representative of a desired reference profile of the terminal legs of the electronic device along the predetermined path. In order to determine whether or not the terminal legs of the electronic device being inspected are deformed as indicated by any discrepancy between the measured profile and the reference profile, a determination circuit is connected to the distance sensor and the reference signal generator for comparing the measured profile of the terminal legs with the reference profile of the terminal legs.
REFERENCES:
patent: 4264202 (1981-04-01), Gugliotta et al.
patent: 4499649 (1985-02-01), Maxner
patent: 4549087 (1985-10-01), Duncan et al.
patent: 4553843 (1985-11-01), Langley et al.
Mitsubishi Denki & Kabushiki Kaisha
Westin Edward P.
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