Lithograph with moving lens and method of producing digital holograms in a storage medium
First Claim
1. A lithographic device for producing digital holograms in a storage medium,having a light source for producing a write beam with a predefined beam cross section,having a writing lens for focusing the write beam onto the storage medium to be written, the writing lens being arranged in a lens holder, andhaving drive means for two-dimensional movement of the write beam relative to the storage medium,whereinthe drive means include a first drive device for moving the lens holder substantially at right angles to the write beam andan aperture of the writing lens is smaller than the beam cross section of the write beam.
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Accused Products
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.
13 Citations
25 Claims
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1. A lithographic device for producing digital holograms in a storage medium,
having a light source for producing a write beam with a predefined beam cross section, having a writing lens for focusing the write beam onto the storage medium to be written, the writing lens being arranged in a lens holder, and having drive means for two-dimensional movement of the write beam relative to the storage medium, wherein the drive means include a first drive device for moving the lens holder substantially at right angles to the write beam and an aperture of the writing lens is smaller than the beam cross section of the write beam.
Specification