OPTICAL DATA CARRIER AND METHOD AND SYSTEM FOR RECORDING/READING DATA THEREIN

摘要

The present invention discloses an optical data carrier comprising an optical recording medium in which data is recordable and readable as a result of one-or multi-photon interaction. The data carrier comprises one or more recording layers, each comprising spaced-apart recording regions arranged in multiple planes. The spaced-apart recording regions are arranged in a composite data pattern comprising a first main data and second tone data of different spatial frequencies to thereby respond to a reading one- or multi-photon signal by a first data signal and second tone signals, respectively. There is also disclosed a method for recording the data in the optical carrier, an optical system for use in recording/reading the data in the optical data carrier, and a control system for use with an optical head system for recording/reading the data in the optical data carrier.