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The Chessy test specimen comprises more than 1.6 million gold squares on silicon which form a four-fold chequerboard pattern in a total size of 1cm2.

Shadow cast carbon replicas of diffraction line gratings.

Using this standard, the three major instrument calibrations: magnification, camera constant for indexing diffraction patterns and image/diffraction pattern rotation, can all be carried out using a single specimen.

A single 1000 mesh 3mm diameter TEM grid for calibration. Supplied in a vial.

This is available in copper, nickel or gold, in 1000, 1500 and 2000 mesh (1000, 1500 or 2000 repeat distance per inch), ie. 25, 18.75 and 12.5µm. Special prices valid while stocks last.