Spectra Film Gate
Photometer II
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INTRODUCTION:
The Spectraź Film Gate Photometer II offered by Spectra
Cine is a significant advance in the field of
photometry. It is extremely sensitive and solid state
throughout. Reads directly in printer steps of 0.025 log
exposure units. The large, uncrowded scale has an 80
printer point range and affords ease and accuracy in
reading. A variety of probes are available for use in
Acme optical printers, Bell & Howell Model "C", "J", and
"A" contact printers, ARRI printers and Oxberry
printers. Other special film gate and eyepiece probes
available upon request.
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PRODUCT FEATURES
A Photometric System for Measuring Exposure Level and
Uniformity in continuous Color Printers.
The Spectraź Film Gate Photometer II consists of a read-out
unit and a series of probes which are inserted in the
film gate of color printers. The probes are designed to
monitor and help maintain optimum performance, (color
balance, density, and uniformity) of motion picture
printers. The color probes (900-OP-C and 900-BH-C)
measure the average irradiance (exposure) through red,
green, and blue filters. These filters enable the probes
to see light as the film does. The 900-BH-C-1 continuous
printer probe also measure the illumination uniformity
in 10 small increments across the width of the aperture
in 35 mm continuous printers. The ability to check both
illumination uniformity and average irradiance level in
a single device is made possible by use of a unique
electro-optical design which utilizes
an ultra-stable segmented silicon cell in conjunction
with electronic scanning.*
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BASIC
SPECIFICATIONS:
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Basic Specifications: Model 900.
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SCALE: Graduated in 40 uniform steps, each
step representing an intensity change equivalent to a
printer point (0.025 log exposure units).
SCALE RANGES: Two ranges, 0 to 40 and 40 to 80 printer
points, covering an illuminance range of 100 to 1.
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REPEATABILITY:
+1/2 printer point.
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SENSOR: selected silicon cell for high
stability and repeatability.
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SPECTRAL SENSITIVITY: Accurately matched
to that of typical color print stocks.
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ELECTRONICS: Solid-state throughout.
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METER: Taut-band type micro ammeter.
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SIZE: 12" long - 9" high - 7" wide.
Storage area for probes built-in.
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WEIGHT: 12 pounds.
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Probe
Specifications:
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OPTICAL PRINTER probes:
900-OP-C Color Probe. Providing a means for precisely
checking and controlling the color balance and exposure
level of optical printers. Readings are made through primaries red, green, blue as well as
white light. Read directly at film gate, in
printer points.
CONTINUOUS CONTACT PRINTERS:
900-BH-C-1 Color and Scanning Probe. This probe measures
average irradiance through red, green and blue
filters, and also a "white light" with out any filter.
The same probe also measures the illumination uniformity
in ten increments across the slit of a 35 mm printer;
the illumination uniformity may also be checked through
any of the colored filters in order to isolate "color
wedging".
900-BH-C-2 Continuous Color Probe. This probe
identical to the Model 900-BH-C-1 probe except
that the scanning feature has been omitted.
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Scanning Probe (900 - FP)
The 900-FP Scanning Probe for step printers consist of
a separate precision slide for both the "X" and "Y"
directions, each with 25 positive detents, enabling
measurement of illumination uniformity in 25
independent positions of the 35 mm aperture.
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Eyepiece
Probe
(900 -E )
The 900-E Eyepiece Probe is available for monitoring
the light level at the reflex viewing eyepiece
position of step printers without requiring removal of
film from the printer gate.
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