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Anchi Cheng, 02/16/2011 12:23 PM
Optimizing Autofocus¶
Focus, Z Focus, tomo Focus and other variation of focus nodes use the same Focus class but with different settings, focus sequence and position in the MSI sequence to achieve different effects. Each need to be optimized for your instrument and usage. The defaults we provide works for us but an understanding of how it works can help you having the smoothest run and getting the best data.
| Node Name | Found in Application | Prerequisite | Performance Target |
| Z Focus | all MSI | visible area on the grid | grid almost at eucentric height, defocus zero is no more than what Focus node can handle |
| Focus | most MSI | grid almost at eucentric height to allow using only defocus to make correction without significant beam shift | defocus zero is reset to within acceptable tolerance for final exposure |
| Tomo Focus | MSI-Tomography | grid close to eucentric height, defocus zero is at eucentric height | grid is accurately set at eucentric height |
< MSI Operation | Queuing option >
Updated by Anchi Cheng almost 14 years ago · 5 revisions