MATRIX VISION - mvBlueFOX3 Technical Documentation
mvBlueFOX3-2205 / BF3-5M-0205Z (20.5 Mpix [5544 x 3692])

Introduction

The sensor is a back-illuminated rolling shutter, i.e. the image is acquired through the back side without any obstacles like wiring or circuits. Therefore, a wider range of light is collected on the photo-diode.

Feature Description
Manufacturer Sony
Sensor name IMX183
Max. frames per second 22
Device Structure CMOS image sensor
SNRmax [dB]1/ 41.6
DNR (normal / HDR) [dB]1/ 71.5 / -
Image size 1
Number of effective pixels 5544 (H) x 3692 (V)
Unit cell size 2.4µm (H) x 2.4µm (V)
ADC resolution / output 12 bit → 8/10/(12)

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

Shutter modes

The sensor offers several shutter modes:

  • rolling shutter (mvShutterMode = "mvRollingShutter"),
  • rolling shutter flash (mvShutterMode = "mvRollingShutterFlash"), and
  • global reset release shutter (mvShutterMode = "mvGlobalReset").

With the rolling shutter the lines are exposed for the same duration, but at a slightly different point in time.

  • The exposure time which is set corresponds to the exposure time of each line.
  • The exposure signal corresponds to the exposure of the first line.
Note
Moving objects together with a rolling shutter can cause a smear in moving objects.

With the rolling shutter flash

  • The exposure time which is set corresponds to the time where all lines are exposed simultaneously.
  • The exposure signal corresponds to the time where the last line starts until the first line ends.

The global reset release shutter starts the exposure of all rows simultaneously and the reset to each row is released simultaneously, too. However, the readout of the lines is equal to the readout of the rolling shutter: line by line:

Note
This means, the bottom lines of the sensor will be exposed to light longer! For this reason, this mode will only make sense, if there is no extraneous light and the flash duration is shorter or equal to the exposure time.

Spectral Sensitivity

Figure 1: Spectral sensitivity mvBlueFOX3-2205G
Figure 2: Spectral sensitivity mvBlueFOX3-2205C

Timings

Name Value
InternalLineLength 876
VerticalBlankLines 37
SensorInClock 72 MHz
NumberOfLVDS 8

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 (FPSmax) in free running mode you will need following formula:

             (InternalLineLength / SensorInClock) * VerticalBlankLines       ImageHeight * (InternalLineLength / SensorInClock)
FrameTime =  ---------------------------------------------------------   +   --------------------------------------------------
                                 1000                                                              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

Connection

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: mvBlueFOX3
Image bit depth:
Pixel clock:72 MHz
Image width: pixels
Image height: pixels
Exposure time: us
Device throughput: Device Sensor Throughput
Device Link Throughput
Link speed:
   
Frame rate (max): 1/s
 
  
The exposure time step width is limited to the sensor's row time of 12.16 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