American Cinematographer - December 1980 - 68

PERFECTONE CONTINUOUS MOTION HIGH-SPEED PROJECTOR "COMITOR10 HS
In this

unique projector, with images being scanned continuously, a
and slow-speed optical flicker is eliminated

shutter is unnecessary

At PHOTOKINA

'80 Perfectone pre¬

sented its Continuous Motion

HighSpeed Projector COMITOR 16 HS. A
unique continuous motion projector
capable of large screen projection with¬

Possibility of TV Image
Simultaneously with Projection.
*

out limitation on level of illumination, the

COMITOR 16 HS includes the

following

features:
*

*

*

*

Optical compensation by high precision
rotating and segmented mirror unit.
Completely distortion free image.
Complete absence of the optical and
chromatic aberrations inevitably pres¬
ent in polygon or similar type of optical
compensation systems.
Extremely smooth propulsion of the film
in the gate between 2 sprockets. Film
tension across these sprockets and
throughout is at an absolute minimum
ensuring high speed running without
possible damage to the perforations
and eliminating any deterioration of the
film even with continuous repetition.
Speed of projection is 24 fps and 25 fps
with control at synchronous speed by
mains

or

projection mode-fixed speeds are
available at 4 times normal forwards
reverse

plus variable speed also at

In addition to above, variable speed is
provided up to 750 frames a second,
without picture, for fast spooling for¬

wards and

reverse.

Very close control of tension of spooling
running permits
the use of plates and bobbins without
the necessity of flanged spools.
Combined optical and magnetic sound
reproduction including a sound stabilis¬
ing flywheel which is motor driven ex¬
cept when film is running forwards at
normal speed. In this mode the flywheel
is smoothly coupled to the sound drum
thus ensuring very quick stabilisation
and rapid start without strain on the film
or possibility of scratching.
Highly efficient Xenon illuminant of
horizontal layout with metallic mirror
under all conditions of

*

*

system.
*

Projection is possible at

very

slow

speeds without reduction in screen
*

Basic

brightness.
Projection of
4 frames

(at

a

an

image at speeds below

second

in

stationary mode
reduced level of illumination) is

assured

a

or

by an automatic heat reducing
shutter in the light path.
1274

on

the

screen.

Principle

use the Rythm-O-Start
synchronising
system. The second generator having an
output of 250 HZ (2 phase) furnishes the
locking signal for the Rapimag system
and range of machines.

Television Colour Camera
The Comitor Type HS 30 which incor¬
porates a TV colour camera caters for all
types of users and fields of operation in
both the normal cinema type of pro¬
duction work and combined TV and film

The film is scanned

travelling in con¬
tinuous mode with tension accurately
maintained in the aperture gate by a
combination of drive and feed sprockets
with slight reverse or holdback tension.
Optical compensation to arrest the con¬
tinuous motion is accomplished by a
compact and elegant rotating mirror
wheel assembly located in the light path.
An oscillating motion imparted to each
mirror segment compensates precisely

Continued

on

Page 1286

The versatile "Comitor 16 HS" projector
runs at standard speeds of 24 fps or 25 fps,
but fixed speeds are also available at four
times normal forwards and reverse, plus
variable speed also at four times normal.

for the advance of each film frame.
Technical

4 times.

*

in illumination

In

and

*

optional facility, a compact
Ikegami 3 tube colour TV camera can
be built into the projector to provide a
high quality TV image on a monitor in
parallel with the projected picture.
The optical splitting elements do not
affect the quality of the projected image
and result in only a very small reduction
an

other external control fre¬

quency.
*

As

sepmag machines to be coupled in lock

The

Advantages

vacuum

surfaced coated mirrors

free from all

optical aberrations thus
allowing the use of a high luminosity sys¬
tem with lenses of large aperture.
Due to the fact that the images are
scanned continuously, a shutter is un¬
necessary and optical flicker is elimi¬
nated even at very slow speeds of 2 to 3
fps.
A feature of the system is that standard
projection lenses can be employed of
focal lengths from 25mm to 75mm and
are

with barrel diameter of 42.5mm.
The projector is equipped with a dual
electronically controlled d. c. motor sys¬
tem functioning as follows:
Forwards and reverse running at 24 fps
or 25 fps synchronised to mains fre¬
quency or to other external frequency.
-Variable speed forwards and reverse
from 0 to 100 fps with projection.
-Accelerated variable speed forwards
and reverse up to 30 times normal speed
without picture.
The main drive has 2 coupled pulse
-

generators allowing the projector to as¬
sume the role of a master machine con¬

trolling in electronic synchronisation
separate magnetic sound machines

equipped with Rythm-O-Start or

Rapimag synchronisation system.
The 50 hz generator is used when the
AMERICAN

CINEMATOGRAPHER, DECEMBER, 1980
American Cinematographer - December 1980

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