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Functionality

Image Aqcuisition

Readout Modes

The FX cameras provide two different readout modes:

• Sequential readout: Frame time is the sum of exposure time and readout time. Exposure time of the next image

can only start if the readout time of the current image is finished.

• Simultaneous readout (interleave): The frame time is determined by the maximum of the exposure time or

of the readout time, which ever of both is the longer one. Exposure time of the next image can start during the

readout time of the current image.

The camera chooses the interlace mode of IWR or ITR automatically depending on integration time and frame rate

settings. With the new revision of the camera, it is possible to change the readout mode by sending a command to the

camera. For more information, see the ASCII for FX -series document or the GigE software user interface.

Note: It is not possible to use this feature with the previous revision’s FX17 cameras without hardware

changes.

The following figure illustrates the effect on the frame rate when using either the sequential readout mode or the

simultaneous readout mode (interleave exposure).

Figure 16: Frame rate in sequential readout mode and simultaneous readout mode

Sequential readout mode For the calculation of the frame rate only a single formula applies: frames per second equal

to the inverse of the sum of exposure time and readout time.

Simultaneous readout mode (exposure time is less than readout time) The frame rate is given by the readout time.

Frames per second equal to the inverse of the readout time.

Simultaneous readout mode (exposure time is greater than readout time) The frame rate is given by the exposure

time. Frames per second equal to the inverse of the exposure time.

Specim FX10 Series User Manual

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