Foucault-Miren 4-48 (0.5 – 6 LP/mm, sheet of 11 patterns)
The test grid is designed for the appraisal of the illustration quality of optical system like cameras, lenses, microfilm systems, amplification systems and many more. It consists of 11 groups each with four line grids which are arranged in the angles of 45°, 0°, 135° and 90°.