Appeal No. 1997-2311
Application No. 07/978,957
Claim 1 is illustrative of the claimed invention, and it
reads as follows:
1. A position data acquisition apparatus for providing
position data with respect to an object, said apparatus
comprising:
a TV camera;
a laser light source;
a difference circuit for calculating a difference
signal between a first image data taken with said TV camera
while said laser light source is off and a second image data
taken with said TV camera while said laser light source is on;
a binarization circuit for binarizing an image data
signal from said difference circuit by comparing said image
data signal with a threshold value; and
an integrating circuit for integrating outputs of
said binarization circuit for a frame and for producing the
position data.
The references relied on by the examiner are:
Seto et al. (Seto) 4,912,770 Mar. 27,
1990
Kunimitsu et al. (Kunimitsu) 03-162395 July
12, 1991
(Japanese patent application)
Claims 1 through 3 stand rejected under 35 U.S.C. § 103
as being unpatentable over Kunimitsu in view of Seto.
Reference is made to the briefs and the answer for the
respective positions of the appellants and the examiner.
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