Science and Engineering at The University of Edinburgh |
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Section Contents
Point Counting
Two Point Counting system are available:- Leica/Prior system
- Conwy Valley System
Leica/Prior System
The Up-graded Leica microscope with Prior ES11LB motorised stage (November 2007) and in-house software can be used for point counting.
The point counting software allows:
- Stage movement up to 126mm x 76mm in micron steps
- Stepsize from microns to centimeters
- Up to 8 mineral phases can be logged
- Random point selection within a ROI
- Text file output option
Conwy Valley System
The Conwy Valley System's PetrogLite point counter was purcahsed from School funds in 2009.The digital stepping stage can be mounted on the rotary stage of the Nikon or Leica microscopes and is connected and controlled via a serial cable to your computer.
Essential Reading
Improved Estimators of Uncertainty in Proportions, Point Counting, and Pass-Fail Test Results
Richard J. Howarth (1998) Am. Jour. Science V298 p594-607