© 2016 Thorlabs Scientific Imaging
4 Programming (SDK)
383
4.3.102 is_Trigger
Syntax
INT is_Trigger (HIDS hCam, UINT nCommand, void* pParam, UINT cbSizeOfParam)
Description
is_Trigger() activates the burst trigger mode in GigE and USB 3 uEye cameras. In burst trigger
mode, the camera captures a series of images in rapid succession on receipt of a single trigger
signal. The trigger signal can be generated by the software (is_FreezeVideo()) or transmitted via
the digital input of the camera. The burst images are captured and transferred at maximum speed.
The maximum speed depends on the pixel clock parameter (see is_PixelClock()) and the
exposure time parameter (see is_Exposure()). is_Transfer() allows adjusting the latency of
image data transfer.
The nCommand input parameter is used to select the function mode. The pParam input parameter
depends on the selected function mode. If you select functions for setting or returning a value,
pParam contains a pointer to a variable of the UINT type. The size of the memory area to which
pParam refers is specified in the cbSizeOfParam input parameter.
This function is currently only supported by the GigE and USB 3 uEye camera series.
Note on the uEye trigger functions
In a future version of the uEye API, all trigger functions will be combined in a single
is_Trigger() function. The following functions will then be obsolete:
is_SetExternalTrigger()
is_ForceTrigger()
is_SetTriggerCounter()
is_SetTriggerDelay()
is_TriggerDebounce()
Note on trigger delay in burst trigger mode
If you set a trigger delay with the is_SetTriggerDelay() function, the delay will only
apply to the first image after each trigger signal.
Input parameters
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