Arrangement for reading an optically readable carrier

摘要

The present invention concerns an arrangement for reading an optically readable carrier on which data is stored in the form of diffractive elements. The data elements each have a plurality of adjacent tracks on the carrier with data elements being positioned on adjacent tracks. The system utilizes an illumination device for projecting a light onto the carrier in order to obtain diffraction of light along the entire length of each of the data elements with an optical arrangement collecting light emerging from the carrier. The optical arrangement is configured and positioned so that light which emerges from the carrier is selectively collected as a function of the angular direction of light from the carrier. The collected light is converted into a data readout signal.