Appeal No. 1997-1698
Application No. 08/348,447
This appeal is from the final rejection of claims 8-10, 13
and 14, all the claims pending in the application.
The invention pertains to a device for determining the
presence or absence of surface roughening. Claim 8, the only
independent claim, is illustrative and reads as follows:
8. A portable device for determining the
presence or absence of surface roughening,
comprising:
a hand-held enclosure including a window
to be placed adjacent and moved along a surface
to be characterized;
a light source disposed within the
enclosure to project a beam of light through
the window and onto a localized area of the
surface, the path of the beam reflected by the
surface and back through the window defining an
optical axis;
a light-sensitive detector disposed on the
optical axis within the enclosure to receive
light scattered by the surface and output an
electrical signal representative of the light
received;
an optical blocking element supported
within the enclosure at a point along the
optical axis between the window and the
detector to block the beam when reflected by a
substantially non-roughened surface;
a lens supported within the enclosure
along the optical axis at a point between the
window and the blocking element to gather light
scattered off-axis by a roughened surface and
focus the gathered light onto the detector;
a two-state indicator disposed on the
enclosure;
and
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