TM 5-6675-319-14
Phosphor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Substance that emits Iight when excited
Photomultiplier
electrically.
Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Electron multiplier in which electrons
released by photoelectric emission are
multiplied in successive stages by dynodes
that produce secondary emission.
Positive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A photographic image, usually made from a
negative, in which the tones are not reversed
as in a negative. A positive on paper is
usually called a “print’’: on a transparent
base, such as film, a positive is called a
“Transparency”.
Raster Control Potentiometer. . . . . . . . . . . . . . . . . . . . . . . Allows individual control of the four raster
edge positions.
Roll paper Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . In automatic print mode advances paper
when hood is raised.
Run/Stop Flip-Flop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multivibrator capable of assuming either of
two stable states.
Safelight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A darkroom lamp with filters that transmit
light of a “safe” color which will not expose
a photographic emulsion within a reasonable
time. Photo materials require different
safelight filters. See instruction sheet packed
with the film.
Shadow . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. The darkest portions of a picture. ln a
negative, the low-density areas are called the
“shadow areas”, because they correspond
to the high-density (dark portions of the
original.
Slow Axis Control Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Determines number of lines to expose entire
negative and spacing between lines.
Staircase Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Series of step currents whose overall
waveform resembles a staircase.
Step Wedge Negative (Grey Scale). . . . . . . . . . . . . . . . . . . . . . . . . Strip of film whose transparency changes in
graduated steps from one end to the other.
Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Time rate of linear motion in a given
direction.
9-2.2
Change 1
