Lithograph with beam guidance and method of producing...

Details Lithograph with beam guidance and method of producing... Lithograph with beam guidance and method of producing...

2002-03-28

2008-11-04

Angebranndt, Martin J (Department: 1795)

Radiation imagery chemistry: process, composition, or product th

Holographic process, composition, or product

C430S002000, C359S009000, C359S035000

Reexamination Certificate

active

07445873

ABSTRACT:
Producing a digital hologram-in a storage medium includes: (i) focusing a write beam onto the storage medium; (ii) moving the write beam two-dimensionally relative to the storage medium; (iii) focusing a scanning beam onto a beam-guiding mask having a plurality of tracks; (iv) moving the scanning beam two-dimensionally relative to the mask, the movement of the scanning beam being coupled with the movement of the write beam; (v) generating a position control signal when the position of the scanning beam deviates from the scanned track by a predefined value; (vi) controlling the position of the write beam on the storage medium with the aid of the position control signal; and (vii) 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.

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