Maintenance; Cleaning Lenses - Kodak FS-10-N Operation & Maintenance Manual

MAINTENANCE
..,
VIII
CLEANING LENSES AND REFLECTOR
The condensing lenses and the projection lens of the
Sound Kodascope are lumenized, that is, a special hard
coating has been applied to all the air-glass surfaces.
The tinted appearance of the lenses is due to this treat-
ment, which increases the light transmitted, thus increasing
the brilliance of the image on the screen.
like any fine lens, the projection lens on your projector
should be cleaned with care. Remove the lens by drawing
it out of the lens holder. With a soft lintless cloth, or
Kodak lens Cleaning Paper, carefully wipe the two lens
surfaces.
To clean the CONDENSER
lENS,
remove the LAMPHOUSING
as described on page III. Remove the condenser lens from
the housing and clean it in the same manner as the pro-
jection lens. When replacing the condenser lens, push it in
as far as it will go and tighten the lock screw. Clean the
REFLECTOR without removing it from the lamphousing.
Do not wet the cloth used for cleaning lenses. If moisture
is required, breathe on the lenses or use a drop of Kodak
lens Cleaner.
CLEANING THE GATE
To remove small pieces of film emulsion which are visible
on the screen during. projection, remove the lens, reach
throunh
the lens holder with a brush or small stick, and
carefully run the brush or stick around the edges of the
cperture.
To remove particles of emulsion from the surface of the
GATE, use a strip of soft cloth about the width of the fllrn.
Rotate the threading knob until the pull-down claws are
withdrawn. Dampen the cloth and thread it into the gate
just as film is threaded, close the gate, and draw the cloth
up and down.