This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.

=================================================================================

A polar net is constructed with the north pole of a reference sphere pointing to the north pole of the projection. Similar to the Wulff net, the polar net consists of two families of lines.

The Wulff Net is useful for performing general rotations about the pole (plane normal) of the projection and is convenient for measuring angles between poles (plane normal) that lie along the same line of longitude. However, the highly symmetrical Polar Net contains less information than the Wulff net and is therefore less versatile than the Wulff net for performing crystallographic manipulations.