Symptom

When scanning large regions of interest using predictive focus, prediction points may not be well-focused and may be blurry.

Cause

This problem is may be caused in some instances by the method used to automatically focus prediction points. The initial focus point selected to start the scan is used as the center of the image stack collected for each prediction point. This may prevent accurate focus for some points within the region that are significantly higher or lower than the initial focus point.

Resolution

Starting in uScope Navigator v4.3 RC44, the center of the focus stack for prediction points is determined from previously captured neighboring prediction points. This helps the predictive focus method maintain good focus on the prediction points while scanning them a little bit faster.

If you are using uScope Navigator v4.3 RC43 or earlier, contact our support department for the latest software release.

In addition, you may want to reduce the grid spacing for the predictive focus method to acquire a more resolute focus map. Refer to Predictive Focus Device Settings for more information.