Rigid fiber optic light guide for installing in operating devices in motor vehicles like air-conditioning controls has surfaces for coupling and decoupling light.

摘要

Within a fiber optic light guide total reflection on a light-deflecting surface deflects a beam of light coupled into the fiber optic light guide via a light-coupling surface (6). The light-deflecting surface is arched in the form of a parabola or is made to approximate the form of a parabola by using several even reflective surfaces (8a-8c).