Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
2005-06-07
2005-06-07
Allen, Stephone B. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
C250S559440, C356S237300, C324S537000
Reexamination Certificate
active
06903360
ABSTRACT:
Disclosed is a method and apparatus for determining the presence or absence of a component on a printed circuit board. The method and apparatus utilizes a photo-sensor and photo-detector that are positioned within a predetermined non-contacting distance from the expected location of a given component under test. The photo-emitter emits a controlled amount of light energy on the expected location of the component under test on the printed circuit board. The photo-sensor detects the amount of reflection off the surface of the expected location of the component under test. Because the amount of reflection differs between reflection off the surface of the component under test and reflection off the surface of the bare board, based on the reflection measurement, the component under test can be classified as either present or absent at its expected location on the printed circuit board.
REFERENCES:
patent: 5006808 (1991-04-01), Watts
patent: 5124660 (1992-06-01), Cilingiroglu
patent: 5138266 (1992-08-01), Stearns
patent: 5254953 (1993-10-01), Crook et al.
patent: 02061505 (1988-08-01), None
patent: 04348210 (1992-12-01), None
Agilent Technologie,s Inc.
Allen Stephone B.
LandOfFree
Method for detecting missing components at electrical board... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for detecting missing components at electrical board..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for detecting missing components at electrical board... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3459231