Patent ID: 7445873

Claim:
A method of producing a digital hologram in a storage medium, the method comprising: focusing a write beam onto the storage medium; moving the write beam two-dimensionally relative to the storage medium; focusing a scanning beam onto a beam-guiding mask the beam-guiding mask having a plurality of tracks; moving the scanning beam two-dimensionally relative to the beam-guiding mask, the movement of the scanning beam being coupled with the movement of the write beam and the scanning beam being coupled out so it is not incident upon the storage medium; generating a position control signal when the position of the scanning beam deviates from the scanned track by a predefined value; controlling the position of the write beam on the storage medium with the aid of the position control signal; and writing the hologram by introducing radiation energy point by point, the intensity of the write beam being controlled as a function of the position of the write beam on the storage medium.