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6
u
Mirror Shutter
A half-moon shaped mirror rotates
in front of the lm gate at the
camera speed. Half of the time the
mirror covers the lm and the light
from the taking lens is reected
up into the viewnder. During that
time, the lm is transported one
frame further. The other half of
the time the mirror leaves the light
path open, so the light from the
taking lens is projected onto the
lm, exposing an image. Since the
mirror's function is to both reect
and shutter light, it is known as a
"mirror shutter".
v
Fiber Optic Screen
The light from the lens is projected
onto a screen (a ber optic screen
in the 416 cameras), which acts
as a rear projection screen. This is
where the viewnder image forms.
w
Field Lens
The eld lens (named as such
because located close to the
image eld) refracts the light into
the entrance pupil of the primary
viewnder lens and the video assist
lens.
x
Video Assist Beam Splitter
80% of the light passes straight up,
while 20% is reected to the side
and projected through the video
assist optics (not pictured) onto the
video assist CCD sensor.
y
Supplementary Lens
U
Protective Glass
An optically clear glass plate on the
top surface of the camera body pro-
tects the components underneath
from dirt contamination.
V
Supplementary Lens
W
ARRIGLOW LED Module
Red green and blue LEDs are situ-
ated on an electronics board above
the partial mirror.
X
Partial Mirror
The light from the ber optic screen
is reected into the viewnder.
At the same time, the light from
the ARRIGLOW LEDs above is let
through. This light is then reected
off the frame line markings on the
ber optic screen, providing illumi-
nated frame lines when needed.
at
90 Degree Prism
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Primary Lens
Picks up the image from the ber
optic screen.
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Mirror
am
Pechan Prism
Automatically keeps the image
upright when the viewnder is
rotated. Also allows for manual
image rotation.
an
Secondary Lens
Provides the image for the eyepiece.
ao
Mirror
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Protective Glass
Located at the mechanical interface
to the eyepiece or eyepiece
extension, this protective glass
prevents dust from getting into the
viewnder optics.
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Eyepiece
The eyepiece allows the operator to
view the image. It also provides a
focus adjustment of approximately
+/- 3 diopters.
z
light path inside camera body
z
light path inside viewnder
AT
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