Andor Technology Zyla sCMOS 4.2 PLUS, Hardware Manual

Page: 52 / 78

version 2.0 rev 18 Feb 2021
52
2.6.3.7 Global Shutter Triggering Constraints
The table below shows a summary of constraints when operating the Zyla 5.5 model in Global Shutter mode:
Table 32: Global Shutter Mode Triggering Constraints
Global Shutter Triggering Modes Exposure Range
max
trigger
Jitter
Min
trigger
pulse
width
Fast
exposure
switching
supported
Internal
(Non Overlap)
User settable exposure time and Cycle Time Short Exp: 1 Row to (1 Frame + 3 Rows)
Long Exp: (1 Frame + 4 Rows) to 30 s
1 Frame
1 Row
-
-
√
√
Internal Overlap
(Overlap On)
User settable exposure time
(1 Frame + 1 Inte 1 Row) to
30 s
1 Row -
√
External/Software
(Non Overlap)
User settable exposure Time. Cycle Time
controlled via period of external trigger
pulse
(1 Frame + 4 Rows) to 30 s 1 Row
2 Sen-
sor
Clocks
√
External/Software
(Overlap On)
User settable exposure time. Cycle Time
controlled via software trigger function
(1 Frame + 1 Inte 1 Row) to
30 s
1 Row
2 Sen-
sor
Clocks
√
External Exposure
(Non Overlap)
Exposure Time controlled by width of exter-
nal trigger pulse.
Cycle Time controlled via period of external
trigger pulse.
(1 Frame + 3 Rows) to 30 s 1 Row
1 Frame
+
3 Rows
x
External Exposure
(Overlap On)
Exposure time controlled by period of
+ ve
edge of external trigger pulses. Cycle Time is
exposure time
(2 2 InterFrames) to 30 s 1 Row
2 Sen-
sor
Clocks
x
External Start
(Non Overlap)
User settable exposure time and Cycle Time
but sequence initialized via external trigger
pulse
Short Exp: 1 Row to (1 Frame + 3 Rows)
Long Exp: (1 Frame + 4 Rows) to 30 s
1 Frame
1 Row
2 Sen-
sor
Clocks
√
√
External Start
(Overlap On)
User settable exposure time (1 Frame + 1 Inte 1 Row) + 30 s 1 Row
2 Sen-
sor
Clocks
√
NOTES:
1. Exposure Time granularity for all modes is sensor row based so the exposure time in the dialog will
always be rounded to the nearest integer number of row readout times.
2. 1 Row is the time taken to perform a full row readout (2624 clock cycles), i.e. depends on readout rate.
3. 1 Frame is the image height of a sensor half, defined in Rows and determined by the ROI configured,
e.g. full frame = 1080. This is the number of rows that is read out by each sensor half. The frame
readout time for any ROI can be requested via SDK function. (Refer to SDK3 User Guide for details).
4. A short exposure is referred to an exposure that is less than a Frame Readout Time. (Depends on ROI
selected).
5. A long exposure is referred to an exposure time that is greater than a Frame Readout Time. (Depends
on ROI selected).
6. Image acquisition must be stopped to change between short and long exposures. Fast Exposure
Switching can occur in the triggering modes shown above but the exposure time is then limited to the
exposure range shown for each sequence.