Browse Prior Art Database

Illumination System for Robot Robot

IP.com Disclosure Number: IPCOM000099125D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Hebert, TM: AUTHOR [+4]

Abstract

The specific wavelength of illumination and is used so that the fiducial marks appear dark, the bordering regions of glass epoxy circuit board appear bright from fluorescence. The illumination is illustrated in Fig. 1.

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Illumination System for Robot Robot

       The specific wavelength of illumination and is used so
that the fiducial marks appear dark, the bordering regions of glass
epoxy circuit board appear bright from fluorescence.  The
illumination is illustrated in Fig. 1.

      Heretofore, vision systems typically used bright copper marks
and broad spectrum fluorescence of lighting to guide a robot during
an assembly  The brightness of the fiducial marks was thus to vision
system performance, and tarnishing or deterioration of the marks led
to inaccurate

      The invention works in the following way:  An light source
(optimally a high pressure Hg or lamp) a radiates through the filter
b which has the wavelength   or = 366 nm transmitted.  The board is
illuminated with the short wavelength and the epoxy emits in the
range 430 to 580 nm, as in the uncorrected emission spectrum in Fig.
2.  The light is radiated through the second filter c which only
light in the range to the CCD camera d which digitizes the image.
image is then interpreted by a computer system, and the is properly
guided.  Note that deterioration of the marks will not interfere with
the vision system because the marks appear dark.