Figure
Laser
Mouse
Program
After
calibration
the
program
is
set
in
to
a
run
mo
de
whic
h
sim
ulates
mouse
clic
ks
F
or
the
rst
application
it
w
as
only
to
b
e
used
as
a
simple
in
terface
e g
to
bring
up
w
eb
pages
driv
e
dra
wing
programs
etc Fig
When
a
user
inserts
his
or
her
hand
in
to
the
path
of
the
laser
a
virtual
single
mouse
clic
k
is
sen
t
to
the
system
This
allo
ws
a
user
to
clic
k
or
clic
k
and
drag
but
not
double
clic
k
It
is
imp
ortan
t
to
consider
that
this
new
in
terface
o ers
other
abilities
that
a
mouse
is
lac
king
As
it
isn t
a
mouse
gestures
lik
e
double clic
king
are
not
natural
in
this
en
vironmen
t
although
they
could
b
e
incorp
orated
in
a
n
um
b
er
of
w
a
ys
e g
double clic
king
with
the
hand
mo
ving
in
a
second
hand
etc
The
range nder
can
detect
the
width
of
the
p
eak
in
the
data
That
measuremen
t
relates
to
the
size
of
the
ob
ject
and
its
range
in
the
scanned
plane
This
could
b
e
used
for
instance
for
reac
hing
in
a
rd
dimension
The
user
in
terface
of
Windo
ws
could
then
incorp
orate
some
sense
of
the
rd
dimension
in
the
desktop
The
range nder
also
trac
ks
m
ultiple
hands
This