Device for reading from and/or writing to optical recording media

摘要

The present invention relates to a device for reading from and/or writing to optical recording media (6), which has a light source (1) for producing a scanning beam (2), a photodetector (7) for detecting the scanning beam (2) reflected by the recording medium (6) and a semi-transparent mirror (3) arranged in the beam path for directing the scanning beam (2) onto the recording medium (6) and the reflected scanning beam (2) onto the photodetector (7). The object of the invention is to improve a device of this type, in particular also with regard to reducing the production costs. This object is achieved by the semi-transparent mirror (3) being a plane-parallel plate with a layered structure, a partially reflective layer (10) being arranged between two small carrier plates (11, 12).