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1.19.2.1 mvBlueFOX-[Model]200w (0.4 Mpix [752 x 480])
1.19.2.1.1 Introduction
The CMOS sensor module (MT9V034) incorporates the following features:
• resolution to 752 x 480 gray scale or RGB Bayer mosaic
• supports window AOI mode with faster readout
• high dynamic range (p. 138) 110 dB
• programmable analog gain (0..12 dB)
• progressive scan sensor (no interlaced problems!)
• full frame shutter
• programmable readout timing with free capture windows and partial scan
• many trigger modes (free-running, hardware-triggered)
1.19.2.1.2 Details of operation
The sensor uses a full frame shutter (ShutterMode = "FrameShutter"), i.e. all pixels are reset at the same
time and the exposure commences. It ends with the charge transfer of the voltage sampling.
Furthermore, the sensor offers two different modes of operation:
• free running mode (Overlapping exposure and readout)
• snapshot mode (Sequential exposure and readout)
1.19.2.1.2.1 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:
FrameTime = (ImageWidth + 61)
*
((ImageHeight + 45) / PixelClock)
If exposure time is lower than frame time:
FPS_max = 1
----------------------
FrameTime
If exposure time is greater than frame time:
FPS_max = 1
----------------------
ExposureTime
1.19.2.1.2.2 Snapshot mode
In snapshot mode, the image acquisition process consists off several sequential phases:
1.19.2.1.2.3 Trigger
Snapshot mode starts with a trigger. This can be either a hardware or a software signal.
The following trigger modes are available:
MATRIX VISION GmbH
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