Lithograph with moving lens and method of producing digital holograms in a storage medium

US7123340B2 · kind B2 · utility

Assignee

• TESA SCRIBOS GMBH · DE

Inventors

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

Key dates

• Filing date: Mar 28, 2002
• Grant date: Oct 17, 2006
• Expiry date: Oct 2, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H1/0891
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to a lithograph for producing digital holograms in a storage medium (4), having a light source (6, 10) for producing a write beam (12) with a predefined beam cross section, having a writing lens (14) for focusing the write beam (12) onto the storage medium (4) to be written, the writing lens (14) being arranged in a lens holder (16), and having drive means for the two-dimensional movement of the write beam relative to the storage medium. The technical problem of writing computer-generated holograms as quickly as possible and with little effort by means of optical lithography is solved in that a first drive device (18) is provided for moving the lens holder (16) substantially at right angles to the write beam (12) and in that the aperture of the writing lens (14) is smaller than the beam cross section of the write beam (12).The inventon also relates to a method for the lithographic production of a hologram in a storage medium.