Exposure Control - Photon Focus MV3-D640I-M01-144-G2-12 User Manual

Frame End The frame end is an event, which is generated, when a frame is finished.
Frame Burst Start The frame burst start is an event, which is generated, when a new burst of
frame starts.
Frame Burst End The frame burst end is an event, which is generated, when a burst of frame is
finished.
Frame Trigger The frame trigger is an event, which is generated, when a frame is started by a
frame start trigger (see Section 4.3.1), by a frame burst start trigger (see Section 4.3.2) or
by an exposure start trigger (see Section 4.4.2).
Frame trigger wait and frame active status signal are routed to the I/O control block and can
there be selected for output on the physical output line or on one of the available leds. Frame
start, frame end and frame trigger event can be used to trigger or to control other function in
the camera, like counter and timer.

4.4 Exposure Control

Figure 4.8: Exposure Control Block
A frame consists of an exposure cycle and an image read out. The exposure control block takes
care of the exposure cycle. The camera has two modes of exposure time operations, which are
defined by the exposure mode settings:
• Timed Exposure
• Trigger Controlled Exposure
4.4.1 Exposure Mode
The exposure mode configuration defines, if the exposure time is controlled by the exposure
time registers or by the by triggers. Following configurations are available:
Timed Exposure The exposure time is defined by the exposure time register. The value will
determine the exposure time for each frame.
Trigger Controlled Exposure The exposure time is controller by exposure start and exposure
end triggers (see Section 4.4.2 and Section 4.4.3 for more information).
4.4.2 Exposure Start Trigger
The exposure start trigger is used to start an exposure.
Exposure Start Trigger Mode = on As soon as a exposure start trigger has been received, the
camera starts with the exposure cycle, which is showed by the "Exposure Active" status.
The exposure remains until an exposure end trigger has been received (see Section 4.4.3).
The camera is ready to process exposure start triggers, when the acquisition is active,
showed by the "Acquisition Active" status, and when the "Frame Trigger Wait" status is
asserted.
MAN076 09/2017 V1.0
- x p o s u r e C o n t r o l
E x p o s u r e S t a r t T r i g g e r
E x p o s u r e E n d T r i g g e r
4.4 Exposure Control
E x p o s u r e A c t i v e
E x p o s u r e S t a r t
E x p o s u r e E n d
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