Appeal No. 96-4194
Application 08/239,732
with a hole in the center supports the filter 14 (Figure 1).
An electric lamp 12 is mounted on a rod 13 that provides
vertical movement to the lamp through the hole in the table
and inside the filter. The light that shines through leaks or
holes in the filter is visually scanned by the operator of the
testing apparatus via monocular optical device 20. The area
around the inspection apparatus is darkened by curtains 25 and
26.
West discloses a multifaceted rotating mirror 14 (Figures
1 and 2) that directs a beam of radiation from a laser 11 onto
a tin plate strip 10 via lens 25 and mirrors 17, 53 and 54.
The
beam of radiation is scanned across the tin plate strip 10,
and any radiation that passes through holes in the tin plate
strip 10 is detected by an array of perspec light guides 22
which direct the light to a photomultiplier 36.
Merlen discloses a laser scanner 10 that uses a
multifaceted mirror 14 (Figure 1) to direct a beam of
radiation onto a moving web of material 30 without any
4
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Last modified: November 3, 2007