Adimec Camera Link OPAL Series, Operating And Users Manual

Page: 37 / 86

OPERATING AND USER MANUAL OPAL-FAMILY
37
IMAGE CAPTURING AND VIDEO OUTPUT
Timing details normal control mode showing integration and image output overlap. Figure 7.1:
After image 1 has been acquired, it is send to the output due to the falling edge of exposure control.
While outputting image 1, image 2 can be acquired, started by the rising edge of exposure control.
This sequence can run continuously when the exposure control pulse duration is in accordance with
t_frame_min. (Texposure equal or greater than t_frame_min).
NOTE: in the simplified timing diagrams in par 7.5 up to and including par 7.9 integration and
transmitting of only one image is presented. This is done in order to keep the diagrams simple. In
practice however, timing might be a little different because integration time of a frame may start while
the previous frame is still being output.
Image Aquisition in continuous mode 7.5
In continuous mode the camera is fully free-running. No external control signal is needed.
NOTE: When an external control signal is applied, it is ignored. Image acquisition and output timing
is controlled by setting the parameters for integration time and frame period. Basically the camera
integrates during a period as set by the integration time command and outputs the image data
immediately after exposure time is expired.
Factory default the camera is set to this mode. Refer to figure 7.2 for a simplified basic timing diagram.
Simplified example continuous mode Figure 7.2:
By means of the MO0 command the camera will enter continuous mode. In this mode image
acquistion cannot be influenced by means of hardware signals. The camera determines its own timing,
conforming to the integration time and frame period parameters as set by the applicable commands:
Command syntax: ITx
Where x = integration time or exposure time in units of 10 μ s.
Command syntax: FPx
Where x = frame period in units of 10 μ s.
Exposure
control
Sensor
integration
Image
output
Int. im 1 Int. im 2
Output im 2
Int. im 3 Int. im 4
Output im 3
Minimal:
t_frame_min
Minimal:
t_frame_min
Minimal:
t_frame_min
Output im 1
Integration image
Image read-out
CCD Operation
Camera Output