Foucault Frequency Test 25-steps 2-0.5 LP/mm (set of 2 patterns)
The TE137 is designed to do resolution measurements in a range of 2-0.5 linepairs per millimeter. Foucault patterns with horizontal, vertical and both types of diagonal resolution bw-bars are located in a matrix structure of 5 x 5 pattern on two different chart sheets.