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Sensors exposure times

CMOS sensors

Most of CMOS sensors generate the exposure interval internally.
For a few, it is possible to control it by external signalling.
The sensor internal timing depends on the provided system clock.
Most of the sensors are using dividers to generate slower clocks for internal state machines.

The exposure time is mostly defined by a number of row times, where the row time is dependent on various internal settings.
Almost none of them supports exposure time equal to zero.
There is defined minimal exposure time as well as steps between possible exposure times.


SENSOR Min. exposure Exposure step Max. exposure Note
e2V EV76C560 15.625 µs 15.625 µs 1 sec
CMOSIS
CMV300
54 µs 7.56 µs 1 sec defined for max. bandwidth (1)
CMOSIS
CMV2000
16.2 µs 2.69 µs 1 sec defined for max. bandwidth and 8bit per pix. For more bits the values will double (1)
CMOSIS
CMV4000
26 µs 2.69 µs 1 sec defined for max. bandwidth and 8bit per pix. For more bits the values will double (1)
CMOSIS CMV12000 19 µs 6 µs 1 sec With ROI feature (2)
CMOSIS CMV20000 94 µs 16 µs 1 sec
CMOSIS CMV50000 100 µs µs 17 sec
On Semi
VITA1300
74 µs 1 µs 1 sec step 1 µs if exp < 65.54ms; 4 µs if exp<262.1ms; 16 µs otherwise
On Semi PYTHON1300 29 µs 1 µs 1 sec step 1 µs if exp < 65.54ms; 4 µs if exp<262.1ms; 16 µs otherwise
LUXIMA LUX13 1 µs 1 µs 1 sec
LUXIMA LUX19 1 µs 1 µs 1 sec
Sony IMX174 19 µs 4.96 µs 3 sec
Sony IMX252 19 µs 5.29 µs 3 sec
Sony IMX250 20 µs 6.32 µs 3 sec
Sony IMX255 25 µs 10.54 µs 3 sec
Sony IMX253 25 µs 10.54 µs 3 sec
Aptina MT9V034 (Currera) 10.83 µs 0.042 µs 10 sec
Aptina MT9P031 (Currera) 36.38 µs 36.38 µs 10 sec full resolution (2)
Aptina MT9P031 (MU9P) 110 µs
1 ms
110 µs
110 µs
10 sec
10 sec
full resolution in Rolling Shutter mode (2)
full in Global Reset Release mode (2)

(1) - By decreasing bandwidth, the minimum exposure time and exposure step will increase

(2) - Decreasing the width of the image and the use of downsampling further decreases the value of the minimum exposure time.

CCD sensors

Maximum Exposure Times

Following table shows maximum exposure times in minutes for different camera models and different modes:

readout frequency 26 / 52 MHz 65 MHz
model \ readout mode 2/4 TAP 1 TAP 2/4 TAP 1 TAP
Sony ICX674 6.54 min 11.88 min 5.24 min 9.51 min
Sony ICX694 8.71 min 16.24 min 6.98 min 13 min
Sony ICX814 10.4 min 19.62 min 8.34 min 15.69 min
Sony ICX834 12.69 min 24.18 min 10.16 min 19.35 min

Minimum Exposure Times

Triggered Modes

All triggered modes have minimum possible exposure time 26 microseconds.

Not Triggered Modes

If camera frame is not triggered by hardware or software, the minimum exposure time is different for different models and modes.

Following table shows minimum exposure times in microseconds for different camera models and different modes:

readout frequency 26 / 52 MHz 65 MHz
model \ readout mode 2/4 TAP 1 TAP 2/4 TAP 1 TAP
Sony ICX674 47 µs 66 43 58
Sony ICX694 54 µs 82 49 71
Sony ICX814 61 µs 94 54 80
Sony ICX834 69 µs 110 60 94