8.Features
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 113
Electronic Rolling Shutter
Exposure time
Readout time
Exposure line by line
Readout after exposure
Reading
Time
Exposing
Figure 8-15 Electronic rolling shutter
Model
Sensor Type
MER-500-14U3M/C(-L)/MER-1070-14U3M/C(-L)/
MER-1520-13U3C(-L)/MER-1810-21U3C(-L)/
MER-630-60U3M/C(-L)/MER-2000-19U3M/C(-L)/
MER-1220-32U3M/C(-L)
Electronic rolling shutter
Table 8-4 Electronic rolling shutter camera models
The implementation process of electronic rolling shutter is as shown in Figure 8-15, different from the
global shutter, electronic rolling shutter exposures from the first line, and starts the second line exposure
after a row period. And so on, after N-1 line, the N line starts exposing. When the first line exposure ends,
it begins to read out the data, and it need a row period time to read out one line (including the line blanking
time). When the first line reads out completely, the second line just begins to read out, and so on, when
the N-1
th
line is read out, the N
th
line begins to read out, until the whole image is read out completely.
The electronic rolling shutter has low price and high resolution, which is a good choice for some static
image acquisition.
Setting the exposure time
The MER-U3
series camera supports setting the exposure time, step: 1μs. The exposure time is shown
as follows:
Model
Exposure Mode
Exposure Time Range(μs)
Steps(μs)
MER-031-860U3M/C(-L)
Global Shutter
20-1000000
1
MER-031-860U3M(-L) NIR
Global Shutter
20-1000000
1
MER-041-436U3M/C(-L)
Global Shutter
20-1000000
1
MER-050-560U3M/C(-L)
Global Shutter
20-1000000
1
