Lithograph with a trigger mask and method of producing digital holograms in a storage medium

US7384709B2 · kind B2 · utility

Assignee

• TESA SCRIBOS GMBH · DE

Inventors

• Steffen Noehte · Weinheim, DE
• Christoph Dietrich · Herborn, DE
• Robert Thomann · Heidelberg, DE
• Matthias Gerspach · Heidelberg, DE
• Jorn Leiber · Hamburg, DE
• Stefan Stadler · Hamburg, DE

Key dates

• Filing date: Mar 28, 2002
• Grant date: Jun 10, 2008
• Expiry date: Jan 20, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H2222/36
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A lithograph for producing digital holograms in a storage medium includes a light source for producing a write beam, the light source having drive means for the two-dimensional movement of the write beam relative to the storage medium and having a first objective for focusing the write beam onto the storage medium. Writing computer-generated holograms by means of optical lithography is solved in that: a two-dimensional trigger matrix is provided, means of producing a scanning beam are provided, a second objective for focusing the scanning beam onto the trigger matrix is provided, the drive means moves the scanning beam two-dimensionally relative to the surface of the trigger matrix, the movement of the scanning beam being coupled with the movement of the write beam, and means for generating a trigger signal to control the intensity of the write beam are connected to the trigger matrix.