Optical arrangement for determining the distance to a reflecting surface has optical fibers for incident and reflected light, a collimator and multiple focussing elements arranged at a regular predefined distance to each other

摘要

Arrangement for optical distance determination of a reflecting surface (4) on to which light from a first optical fiber is directed with reflected light routed through the same optical fiber or a second fiber to a stationary detector. The incident and reflected light passes through a collimating optical element (2) and at least two focussing optical elements (3'). The focussing elements are arranged at predefined distances to each other and have their optical axes parallel to the collimator axis.