xiQ - Technical Manual Version 1.35
71
t
trig_min
= t
exp
+ t
exps
+ t
rd
Example for MQ013MG-E2, Exposure time = 500µs, image = 500 pixels width x 200 pixels height:
t
trig_min
= 29µs + 500µs + 400µs + 16.6µs * 200lines = 4.249µs
4.3.2.2.
Triggered mode with overlap
Several sensors are capable to trigger exposure in overlap mode, so it is capable to reach the same frame rate as in free run
mode.
When the trigger period is longer than the exposure and readout time, the signal wave form will look similar to
Triggered mode
without overlap
. However when the trigger period is decreased, the sensor will expose the images in overlap mode. In this case,
the frame active signal will be constantly active.
Sensor timing in Exposure Overlapped with Data Readout Mode
figure 4-3, acquisition mode – triggered with overlap
For timing description please see previous paragraph
Typical times for selected camera models
Camera Model
DownS t
itr
[µs]
t
exp
[µs]
t
eio
[µs]
t
expo
[µs]
t
rd
[µs]
Notes
MQ042xG-CM
any
1.4
10
11/224
0
(64.5+5.375*LC)*BWF
N1,N2
MQ022xG-CM
any
1.4
10
11/224
0
(37.625+5.375*LC)*BWF
N1,N2
MQ003xG-CM
any
1.4
10
11/224
0
(40.625+6.771*LC)*BWF
N1,N2,N3
table 4-4, trigger mode with overlap, timing
Notes:
•
N1: V(Input)=15V
•
N2: 8bit per pixel maximum bandwidth (TBD)
•
N3: t
exps
> t
rd
for t
exps
< t
rd
,
t
eio
and t
exp
will plus (t
rd
- t
exp
)
