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THORLABS DCU22 Series User Manual

THORLABS DCU22 Series
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© 2013 Thorlabs GmbH
4 Programming (SDK)
327
4.3.83 is_SetExternalTrigger
USB 2.0
USB 3.0
USB 2.0
USB 3.0
Syntax
INT is_SetExternalTrigger (HIDS hCam, INT nTriggerMode)
Description
Using is_SetExternalTrigger(), you can activate the trigger mode. If the camera is in standby mode, it quits
this mode and activates trigger mode.
In hardware trigger mode, image capture is delayed for each function call until the selected trigger event has
occurred.
In software trigger mode, an image is captured immediately when is_FreezeVideo() is called, or a
continuous triggered capture is started when is_CaptureVideo() is called. In hardware trigger mode, you
can use the is_ForceTrigger() command to trigger an image capture even if no electric signal is present.
When you disable the trigger functionality, you can query the signal level at the trigger input. This option causes the
camera to change to freerun mode.
For further information on the image capture modes of the DCx camera, see How to proceed: Image capture .
Input parameters
hCam
Camera handle
nTriggerMode
Trigger mode
Trigger event
IS_SET_TRIGGER_OFF
Off
-
IS_SET_TRIGGER_HI_LO
Hardware trigger
Falling signal edge
IS_SET_TRIGGER_LO_HI
Hardware trigger
Rising signal edge
IS_SET_TRIGGER_PRE_HI_LO
(Not supported by DCx Cameras)
IS_SET_TRIGGER_PRE_LO_HI
(Not supported by DCx Cameras)
IS_SET_TRIGGER_HI_LO_SYNC
(Not supported by DCx Cameras)
IS_SET_TRIGGER_LO_HI_SYNC
(Not supported by DCx Cameras)
IS_SET_TRIGGER_SOFTWARE
Software trigger
Call of is_FreezeVideo()
(single frame mode)
Call of is_CaptureVideo()
(continuous mode)
IS_GET_EXTERNALTRIGGER
Returns the trigger mode setting
IS_GET_TRIGGER_STATUS
Returns the current signal level at the trigger input
IS_GET_SUPPORTED_TRIGGER_M
ODE
Returns the supported trigger modes
Return values
When used with
IS_GET_EXTERNALTRIGGER
Returns the current setting
When used with
IS_GET_TRIGGER_STATUS
Returns the current signal level at the trigger input
When used with
IS_GET_SUPPORTED_TRIGGER_MODE
Returns the supported modes linked by logical ORs
IS_INVALID_CAPTURE_MODE
The function can not be executed in the current camera
operating mode (free run, trigger or standby).
IS_INVALID_CAMERA_HANDLE
Invalid camera handle
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THORLABS DCU22 Series Specifications

General IconGeneral
BrandTHORLABS
ModelDCU22 Series
CategorySecurity Camera
LanguageEnglish

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