CAMERAS FRAME GRABBERS IMAGING SOLUTIONS
BOBCAT Hardware User’s Manual
IMPERX
Rev. 2.0.9
6421 Congress Ave.
4/8/2014
Boca Raton, FL 33487
www.imperx.com
+1 (561) 989-0006
170 of 329
integration – Figure 2.14. Upon receiving the trigger signal the camera starts
integration for the frame, completes the integration, and transfers the information to
the vertical registers and then captures the image is being read out. There is no delay
between the trigger rising edge and the exposure start. The exposure is set by the
trigger pulse duration or by internal exposure register. The number of frames
captured after each trigger pulse can be programmed. This completes the current
trigger cycle and the camera idles until the next trigger pulse.
CAUTION NOTE
The time interval between the trigger pulses must be greater than the combined
exposure and frame time. If the time between the triggers is shorter, the frame read-
out cycle will be interrupted and part of the frame will be lost.
Only if the main strobe is enabled
VCCD
SHUTTER
TRIGGER
EXPOSURE
FVAL
DATA
STROBE
First Frame Exposure
DATA Out
Only if the trigger strobe is enabled
Figure 2.14 – Standard triggering timing
B.
Fast Synchronized Triggering – Rapid Capture
Fast synchronized triggering (a.k.a. rapid capture) provides the ability to run the
camera in a slave mode, allowing several cameras to be synchronized with an
external master trigger signal. This mode also enables the camera to run close to its
original frame rate. If this mode is enabled, the camera idles and waits for a trigger
signal to come from the selected. Upon receiving the trigger signal, the camera starts
integration until the next trigger is received. Then the information is transferred to
the registers and read out. During this time the next frame is exposed – Figure 2.15.
In this mode the camera exposure can be controlled with the internal shutter or with
the trigger pulse width. If the shutter is not used, the camera exposure time will be
equal to the time between the trigger pulses (trigger period). If the internal shutter is