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	Aptina
Sensor name	MT9M031
Max. frames per second	45.6
Device Structure	CMOS image sensor
SNR_max [dB]^1/	37.4
DNR (normal / HDR) [dB]^1/	54.3 / -
Image size	1/3
Number of effective pixels	1280 (H) x 960 (V)
Unit cell size	3.75um (H) x 3.75um (V)
ADC resolution / output	12 bit → 8/10/(12)

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

Spectral Sensitivity

Figure 1: Spectral sensitivity mvBlueFOX3-1012dG

Figure 2: Spectral sensitivity mvBlueFOX3-1012dC

Timings

Name	Value
PixelClock	40 & 66
VerticalBlank	25

Free running mode

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

            (ImageHeight * (    1650    )) + ((VerticalBlank+2) *      1650    )
FrameTime =                 ------------                           ------------
                             PixelClock                             PixelClock

If exposure time is lower than frame time:

                1000000
FPS_max =   ----------------
               FrameTime

If exposure time is greater than frame time:

                1000000
FPS_max =   ----------------
               ExposureTime

Snapshot mode

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

            (ImageHeight * (    1650    )) + ((VerticalBlank+2) *      1650    )
FrameTime =                 ------------                           ------------
                             PixelClock                             PixelClock

FPS_max =                  1
           -----------------------------------
                 FrameTime + ExposureTime

Frame rate calculator

Note: The exposure time step width is limited to the sensor's row time of 41.3 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

Device Feature And Property List

Frame rate calculator
Mode:	Overlapping exposure and readout
Output image bit depth:	8 bit 12 bit 16 bit
Pixel clock:	74.25 MHz 66 MHz 40 MHz
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