Pentacle is a complete system for on-line tuning of focus and astigmatism of electron zmicroscopes.
Pentacle achieves this by calculation and manipulation of the diffractogram in real time. The system can be installed in a minute - just plug it in to your existing video camera. Pentacle runs on an industry standard Pentium PC, uses a Shark II frame grabber, and tailor written software. On its own, Pentacle is all you need for fast, easy and accurate focus and astigmatism correction on-line. Pentacle allows visualisation of both the image and its diffractogram on-line on the same screen in real time.