Pike Technical Manual
V5.2.0
200
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 hap-
pens, 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 modi
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 65: Trigger modi
