BVS CA-GX1-0124P / mvBlueCOUGAR-X2012p (12.4 Mpix [4112 x 3008])

Introduction

The sensor can acquire a four directional polarization image in one shot. Because the polarizer is under the on-chip lens layer

• reflectances are reduced and
• flare and ghost characteristics are avoided.

The pixel array of the sensor is as follows:

Figure 1: Pixel array gray scale / color

Feature	Description
Manufacturer	Sony
Sensor name	IMX253_POL
Max. frames per second	80
Device Structure	CMOS image sensor
SNRmax [dB]1/	tbd
DNR (normal / HDR) [dB]1/	tbd / -
Image size	1.1
Number of effective pixels	4112 (H) x 3008 (V)
Unit cell size	3.45µm (H) x 3.45µm (V)
ADC resolution / output	12 bit → 8/10/(12)

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

Spectral Sensitivity

Figure 2: Spectral sensitivity BVS CA-GX0-0051PG

Figure 3: Spectral sensitivity BVS CA-GX0-0124PC

Timings

Name	Value
InternalLineLength	1355 (10 bit) / 1614 (12 bit)
VerticalBlankLines	54
SensorInClock	74.25 (@50 MHz Pixel clock)

Free running mode

In free running mode, the sensor reaches its maximum frame rate. This is done by overlapping erase, exposure and readout phase. The sensor timing in free running mode is fixed, so there is no control when to start an acquisition. This mode is used with trigger mode Continuous.

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

                 InternalLineLength            ImageHeight + VerticalBlankLines 
FrameTime =  ------------------------------ * ----------------------------------
                    SensorInClock                           1000

If exposure time is lower than frame time:

                 1
FPS_max =  ------------
            FrameTime

If exposure time is greater than frame time:

                 1
FPS_max =  --------------
            ExposureTime

Frame rate calculator

Note

The calculator returns the max. frame rate supported by the sensor. Please keep in mind that it will depend on the interface and the used image format if this frame rate can be transferred.

.

Frame rate calculator
Mode:	Overlapping exposure and readout
Product:	BVS CA-GX1
Output image bit depth:	8 bit 12 bit 16 bit
Pixel clock:	74.25 MHz
Image width:	pixels
Image height:	pixels
Exposure time:	us
Device throughput:	Device Sensor Throughput Device Link Throughput
Link speed:	Single-GigE
	Extended block ID (GEV 2.x)
Network MTU (max. value of the device with the smallest MTU):
Frame rate (max):	1/s
	ExposureTime > FrameTime → FPS = 1 / ExposureTime

The exposure time step width is limited to the sensor's row time of 18.29 us and therefore
- auto exposure with very low exposure times will perform with relatively large increments and
- exposure mode = TriggerWidth (if available) will perform with a jitter corresponding to the row time.

The following trigger modes are available:

Setting (GenICam)	Mode / Setting (obsolete "Device Specific")	Description
"TriggerSelector = FrameStart" "TriggerMode = Off"	Continuous	Free running, no external trigger signal needed.
"TriggerSelector = FrameStart" "TriggerMode = On" "TriggerSource = Software" "ExposureMode = Timed" To trigger one frame execute the TriggerSoftware@i command then.	OnDemand	Image acquisition triggered by command (software trigger).
"TriggerSelector = AcquisitionActive" "TriggerMode = On" "TriggerSource = <desired Line>" "TriggerActivation = LevelLow" "ExposureMode = Timed"	OnLowLevel	Start an exposure of a frame as long as the trigger input is below the trigger threshold. (No FrameTrigger!)
"TriggerSelector = AcquisitionActive" "TriggerMode = On" "TriggerSource = <desired Line>" "TriggerActivation = LevelHigh" "ExposureMode = Timed"	OnHighLevel	Start an exposure of a frame as long as the trigger input is above the trigger threshold. (No FrameTrigger!)
"TriggerSelector = FrameStart" "TriggerMode = On" "TriggerSource = <desired Line>" "TriggerActivation = FallingEdge" "ExposureMode = Timed"	OnFallingEdge	Each falling edge of trigger signal acquires one image.
"TriggerSelector = FrameStart" "TriggerMode = On" "TriggerSource = <desired Line>" "TriggerActivation = RisingEdge" "ExposureMode = Timed"	OnRisingEdge	Each rising edge of trigger signal acquires one image.
"TriggerSelector = FrameStart" "TriggerMode = On" "TriggerSource = <desired Line>" "TriggerActivation = AnyEdge" "ExposureMode = Timed"	OnAnyEdge	Start the exposure of a frame when the trigger input level changes from high to low or from low to high.

Device Feature And Property List