Color mask for color Schlieren apparatus e.g. for analyzing gases, liquids and glass, uses calibration device with at least one entrance surface limiting device

摘要

A color mask for a color Schlieren apparatus has at least one light entrance surface and the color mask comprises at least one calibration device for varying the light entrance surface with regard to its position on the color mask and/or with regard to its geometry. The calibration device specifically comprises at least one entrance surface limiting element movable relative to a light entrance opening and/or relative to a light entrance element of the color mask.