IDS uEye series User Manual page 122

User Manual uEye Cameras V3.32
122
Notes on using the UI-154x / UI-554x
· Sensor speed does not increase for AOI width <240 pixels.
· Extreme overexposure shifts the black level. Please deactivate the Auto Offset function in
this case.
· At very long exposure times and minimum gain, the white level may not be reached. The
gain should be increased by one step in this case.
· Monochrome version only: The sensor internally works like the color version. This might
lead to artefacts when subsampling is used.
· The brightness of the first and last line might deviate due to the sensor.
· Gain values between 53 and 99 may lead to image inhomogeneity.
· Cameras with a date of manufacture after Dec. 9, 2008: The offset control has been
calibrated internally. The calibration corrects offset errors when gain is used. In
calibrated cameras, automatic black level correction is disabled by default. The
calibration can only be used with uEye driver version 3.31 or higher.
· Cameras with a date of manufacture before Dec. 9, 2008: If manual offset control is
used, fixed pattern noise and horizontal lines may become visible. High gain values may
shift the black level and therefore should be avoided.
Offset increases the black level every 7th step. The steps in-between change the
appearance of fixed pattern noise.
© 2009 IDS Imaging Development Systems GmbH