Instruction manual

Table Of Contents
Controlling image capture
PIKE Technical Manual V3.1.0
145
Controlling image capture
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 means that the shutter for a new image can already happen, while
the preceding image is transmitted.
In continuous modes the shutter is opened shortly before the vertical reset
happens, thus acting in a frame-synchronous way.
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.
The external trigger is fed as a TTL signal through Pin 4 of the camera I/O
connector.
Trigger modi
The cameras support IIDC conforming Trigger_Mode_0 and Trigger_Mode_1
and special Trigger_Mode_15 (bulk trigger).
Trigger Mode Description
Trigger_Mode_0 Sets the shutter time according to the value set in the shutter (or extended shut-
ter) register
Trigger_Mode_1 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 Is a bulk trigger, combining one external trigger event with continuous or one-
shot or multishot internal trigger
Table 55: Trigger modi