Metal working – Means to assemble or disassemble – With signal – scale – illuminator – or optical viewer
Patent
1992-09-23
1993-06-01
Hall, Carl E.
Metal working
Means to assemble or disassemble
With signal, scale, illuminator, or optical viewer
29740, 29743, 356375, H05K 330
Patent
active
052148416
ABSTRACT:
The geometric features of a supported component in a machine for mounting surface mount electronic components are either frontlighted or backlighted for inspection purposes. To backlight the features a fluorescent surface above the component is excited with UV light. Since UV light reflected from the component is invisible to the camera system, the features will appear black with a bright background. To frontlight the features, a light source is used which generates light outside the UV range and a) having a wavelength corresponding to the wavelength of the UV fluorescing surface so that no fluorescent is created or b) having a wavelength substantially different from the UV fluorescing surface that is absorbed by the surface without causing fluorescing to take place. This light when reflected from the features is seen by the camera and the features will appear bright in a dark background.
REFERENCES:
patent: 4867569 (1989-09-01), Mohara
patent: 5131139 (1992-07-01), Oyama et al.
Howard James V.
Jackson Rodney P.
Loconzolo William J.
Mirley, Jr. William H.
Whitman Steven M.
Emhart Inc.
Hall Carl E.
Smith Spencer T.
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