Specifications

PROJECTION
OF OPTICAI SOUND
PRINTS
-
General
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During
]oading. the
emulsion faces
the
screen.
b)
Contact
prints.
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rfr<
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f
avco ullc t-.ilru-
The
emulsion can easily
be distinguished
fron
the base,
The optical track can
be either
of variable
densitv
or
(pusn/puLI,)
tracK/.
mm
filn
with optical
sormd track
:
as its
surface appears
dulfer.
rrarirhl ^ ^?6t lcim-ra
nr a.-l+i-l^
ar
ea
\
oruPrs
vf uuf
urp Le
The
varlations in
light
intensity
transmitted
by the
sound head
to
the
photoelectrlc
cell
are
converted into
sound waves
after
amplificatlon.
;
t
t
t
t
t
l
t
t
t
;
;
;
Variabfe
densiLy
Adjustjns Fidelitv
of Reproducti
on
Af her
'l
nad
i ng. tho
g6111d
Lrack
On
qaroon
nr
_lqmn
cida donorr'lirc nr
trtnr on I i mrrm
qorrnrJ
ronnndrrn I i nn i t
Lrr vv4u
!tv!!,
l-fASF,
on the
s ide ol'
tl"e etrulsion.
variable
area
the unper-[orabed
edge o-[
t]re litm
can face
e-L ther
on
the
whether
the flfrn is
of
the a)
or b) type.
-is
imporLant
to
concentraLe
bhe
light
spol on
jhe
sor.urd
This
is done
by adjusting
bhe
Fidelit.v
control
knob.
The
spot is
properlv
ad
jusled
for
f i
Lms r,ri
Lh
emul-
sion
facing
screen
q[q4
the
poinler
of
Lhe
Fide-Lity
knob
is roffire
of
bhe
engraved
wh-Lte
sector. lf
necessary,
improve
the
adjustment
when listening,
for
the
maximum
When
fifns
r,vith
emulsion
facing famp
are
shown,
lurn
the
Fidel.itv
knob
eentfy
towards
the feft
rrom
the
previous
position,
unLif
you
obtain
the
maximrm
amount
of
treble.
Position
of
Fldelitv
knnh fnr
typ"
'
j--rit'-
--
-
(emulsion
facing
screen).
Position
of
Fidelitv
knob
for
type
bi larm
-
(emulsion
facing
projection
lanp).
16