Introduction

The sensor uses a pipelined global snapshot shutter, i.e. light exposure takes place on all pixels in parallel, although subsequent readout is sequential.

Feature	Description
Manufacturer	E2V
Sensor name	EV76C570
Max. frames per second	51
Device Structure	CMOS image sensor
SNR_max [dB]^1/	38.9
DNR (normal / HDR) [dB]^1/	50.7 / > 100
Image size	1/1.8
Number of effective pixels	1600 (H) x 1200 (V)
Unit cell size	4.5µm (H) x 4.5µm (V)
ADC resolution / output	10 bit → 8/10/(12)

¹ Measured accord. to EMVA1288 with gray scale version of the camera

Spectral Sensitivity

Figure 1: BVS CA-SF1-0020ZG

Timings

Name	Value
InternalLineLength	944
InternalADCClock	120

Free running mode

To calculate the maximum frames per second (FPS_max) in free running mode you will need following formula:

                                           2             ImageHeight + 10 
ReadOutTime =  InternalLineLength * ---------------- * (-----------------)
                                    InternalADCClock          1000

If exposure time is lower than read out time:

               1000
FPS_max =  -------------
            ReadOutTime

If exposure time is greater than read out time:

               1000
FPS_max =  --------------
            ExposureTime

Snapshot mode

To calculate the maximum frames per second (FPS_max) in snapshot mode you will need following formula:

                                           2             ImageHeight + 10 
ReadOutTime =  InternalLineLength * ---------------- * (-----------------)
                                    InternalADCClock          1000

                       1000
FPS_max =  ----------------------------
            ReadOutTime + ExposureTime

Line scan mode

The sensor offers also a usage as a line scan sensor. One (gray scale sensor) or two lines (in terms of color sensor) can be selected to be read out of the full line height of 1600 lines. This or these lines are grouped to a pseudo frame of selectable height in the internal buffer of the camera.

The camera then outputs these frames which contain multiples of the same scan line(s) without gaps or interruptions.

To operate in line scan mode, use the following properties:

In "Setting → Base → Camera → GenICam → Device Control", please change the DeviceScanType to line scan.
In "Setting → Base → Camera → GenICam → Image Format Control", please set Width and Height. Height specifies how often the same line(s) will be used to reach the height of the image.
Use OffsetX to shift horizontally the starting point of the exposed line.
Use and OffsetY to shift the scan line vertically.

Note: The sensor will not get faster by windowing in x direction.

Finally, in "Setting → Base → Camera → GenICam → Acquisition Control", please adapt the Exposure Time.
The exposure time as to be low and max. approx. 60 us in order to achieve the max. line scan rate of 12.6 kHz.

You may use longer exposure times at the expense of scanning frequency.

Note: Using more than one line e.g. 5, is like having an area scan with ImageHeight = 5. In line scan mode, the max. ImageHeight is ≤ 16.; You can use either Continuous or a trigger mode as AcquisitionMode in "Setting → Base → Camera → GenICam → Acquisition Control". However, if an external (line) trigger will have to be used, it is absolutely required that the external trigger is always present. During a trigger interruption, controlling or communication to the camera is not possible!

Frame rate calculator (area mode)

Frame rate calculator (line scan mode)

Device Feature And Property List

Frame rate calculator
Mode:	Overlapping exposure and readout
Output image bit depth:	8 bit 12 bit 16 bit
Image width:	pixels
Image height:	pixels
Exposure time:	us
Device throughput:	Device Sensor Throughput Device Link Throughput
Link speed:	USB 2.0 USB 3.0
Frame rate (max):	1/s
	ExposureTime > FrameTime

Frame rate calculator
Mode:	Global shutter (free run) Rolling shutter (free run) Triggered
Color:	Gray scale Color
Exposure time:	us
Frame rate (max):	1000/s