Pike
Technical
Manual
V5.2.3
173
Controlling image capture
Controlling
image
capture
Controlling image capture
Shutter modes
The
cameras
support
the
SHUTTER_MODES
specified
in
IIDC
V1.31.
For
all
models
this
shutter
is
a
global
pipelined
shutter;
meaning
that
all
pixels
are
exposed
to
the
light
at
the
same
moment
and
for
the
same
time
span.
Pipelined
Pipelined
means
that
the
shutter
for
a
new
image
can
already
happen,
while
the
preceding
image
is
transmitted.
Continuous mode
In
continuous
modes
the
shutter
is
opened
shortly
before
the
vertical
reset
happens,
thus
acting
in
a
frame-synchronous
way.
External trigger
Combined
with
an
external
trigger,
it
becomes
asynchronous
in
the
sense
that
it
occurs
whenever
the
external
trigger
occurs.
Individual
images
are
recorded
when
an
external
trigger
impulse
is
present.
This
ensures
that
even
fast
moving
objects
can
be
grabbed
with
no
image
lag
and
with
minimal
image
blur.
Camera I/O
The
external
trigger
is
fed
as
a
TTL
signal
through
Pin
4
of
the
camera
I/O
connector.
Trigger modes
Pike
cameras
support
IIDC
conforming
Trigger_Mode_0
and
Trigger_Mode_1
and
special
Trigger_Mode_15
(bulk
trigger).
Trigger Mode
also known as
Description
Trigger_Mode_0
Edge
mode
Sets
the
shutter
time
according
to
the
value
set
in
the
shutter
(or
extended
shutter)
register
Trigger_Mode_1
Level
mode
Sets
the
shutter
time
according
to
the
active
low
time
of
the
pulse
applied
(or
active
high
time
in
the
case
of
an
inverting
input)
Trigger_Mode_15
Programmable
mode
Is
a
bulk
trigger,
combining
one
external
trigger
event
with
continuous
or
one-shot
or
multi-shot
internal
trigger
Table 66: Trigger modes