Chapter
Design
of
the
Range nder
Tw
o
di eren
t
range nders
w
ere
dev
elop
ed
using
t
w
o
of
the
metho
ds
outlined
in
Chap
ter
Both
a
triangulation
device
and
a
con
tin
uous w
a
v
e
phase
measuremen
t
device
w
ere
constructed
Although
the
phase
device
w
as
the
ob
vious
winner
theoretically
w
e
c
hose
to
build
the
triangulation
range nder
rst
as
it
w
as
electrically
m
uc
h
sim
pler
W
e
found
that
the
non linearit
y
of
the
triangulation
range
measuremen
t
w
as
unsatisfactory
for
a
compact
user
in
terface
o
v
er
long
distances
but
w
ere
able
to
pull
out
some
useful
data
when
scanning
a
small
area
After
more
electronics
design
w
e
w
ere
able
to
build
the
phase measuring
device
Tw
o
units
w
ere
constructed
a
protot
yp
e
using
mostly
hand stu ed
b
oards
and
a
second
revision
using
all
prin
ted
circuit
b
oards
The
rst
v
ersion
w
as
also
built
using
exp
ensiv
e
o the shelf
protot
yp
ing
optics
hardw
are
while
the
second
v
ersion
w
as
built
using
simple
custom built
mec
hanical
assem
blies
After
another
mo
dest
design
simpli cation
this
device
should
b
e
ready
for
prompt
duplication
and
limited run
man
ufacturing
T
riangulation
A
triangulation
range nder
w
as
constructed
as
a
starting
ground
for
the
dev
elopmen
t
of
lo
w cost
laser
hand
trac
k
ers PS
As
this
tec
hnique
can
b
e
explored
using
video
cameras
or
simple
lo
w frequency
photo
dio
de
circuits
it
is
a
relativ
ely
easy
rst
step
to
examine
the
utilit
y
of
suc
h
devices
Our
triangulation
protot
yp
e
consisted
of
t
w
o