This tab provides parameters for settings the pixel clock frequency, frame rate and exposure time for your uEye camera (see also Pixel clock, frame rate and exposure time).
Fig. 115: uEye properties - Camera
Timing
•Camera peak bandwidth
Maximum required bandwidth in MByte/s (peak load). This value is displayed in red if the available Gigabit Ethernet bandwidth is exceeded.
•Camera average bandwidth
Required average bandwidth in MByte/s. This value is displayed in red if the available Gigabit Ethernet bandwidth is exceeded.
The average bandwidth is calculated from the following data: Image size, image format, frame rate, and interface-related protocol overhead.
•Sensor (max. bandwidth)
Maximum data volume in MPixel/s created by the sensor.
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•Pixel
Sets the clock rate at which the image data is read from the sensor. Changes to this parameter affect the frame rate and the exposure time.
Many CMOS sensors allow higher pixel clock frequencies in binning/subsampling mode.
oOptimum
When you select this check box, the highest possible pixel clock is determined and set automatically. The optimum pixel clock is the clock rate at which no transfer errors occur during the time (in seconds) set in the "Auto pixel clock test period" box. The longer you set the test period, the more reliable the determined pixel clock becomes. The total time it takes to automatically set the pixel clock is a bit longer than the test period setting.
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•Frame rate (Freerun)
Sets the frame rate in freerun mode. The available frame rate range depends on the pixel clock setting.
oHold
When you select this check box, the frame rate will remain constant if the pixel clock changes. If the frame rate cannot be maintained, it is set to the nearest possible value.
oMax
The camera is operated at the maximum frame rate that is possible at the current pixel clock setting.
oAuto
Select this check box to activate the auto frame rate function. This function is only available when auto exposure shutter is enabled.
•Exposure time
Sets the exposure time. The available exposure time range depends on the pixel clock setting and the frame rate. A low frame rate setting allows long exposure times. A high frame rate setting reduces the maximum possible exposure time. In combination with flash an exposure time of 1 ms has been proven.
oHold
When you select this check box, the exposure time will remain constant if the frame rate changes. If the exposure time cannot be maintained, it is set to the nearest possible value.
oMax
The camera is operated at the maximum exposure time that is possible at the current frame rate.
oAuto
Select this check box to activate the auto exposure shutter function. If the "Auto" check box is selected, the exposure time and pixel clock can no longer be adjusted manually. Selecting the "Hold" or "Max" check box deselects the "Auto" check box.
oLong-term
If you select this check box, you can set an exposure time of up to 10 minutes on many uEye CCD cameras.
oFine increment
Select this check box to set the exposure time in fine increments. This option is not supported by all camera models.
Default
Click this button to reset all parameters to the model-specific defaults.
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