Interferometrische Längen- oder Winkelmeßeinrichtung

摘要

Represented in Figure 1 is a so-called optical delay line, which has a corner prism (1) with a capped peak (2). A light beam (5) emitted by a laser (4) illuminates the corner prism (1) at the rear through a surface (3) which is produced by the capping of the peak (2). The light beam (5) is retroreflected into the corner prism (1) by a reflecting element (6) in such a way that at least one retroreflection occurs.