LITHOGRAPHY APPARATUS COMPRISING A MOBILE LENS FOR PRODUCING DIGITAL HOLOGRAMS

摘要

The invention relates to lithography apparatus for producing digital holograms in a storage medium (4). Said apparatus comprises a light source (6, 10) for producing a writing beam (12) having a pre-determined beam width, a writing lens (14) for focussing the writing beam (12) on the storage medium (4) to be written, the writing lens (14) being arranged in a lens holder (16), and drive means for displacing the writing beam in a two-dimensional manner in relation to the storage medium. The aim of the invention is to solve the technical problem of writing computer-generated holograms quickly and simply, by means of optical lithography. To this end, a first drive device (18) is provided for displacing the lens holder (16) essentially perpendicularly in relation to the writing beam (12), and the aperture of the writing lens (14) is smaller than the width of the writing beam (12). The invention also relates to a method for lithographically producing a hologram in a storage medium.