Lens system for common aperture holographic storage system
The present invention relates to a lens system (11) for an apparatus (1) for reading from and/or writing to holographic storage media (12), and more specifically to a lens system (11) optimized for an apparatus with a coaxial common aperture arrangement of an object beam and a reference beam. Accord...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | The present invention relates to a lens system (11) for an apparatus (1) for reading from and/or writing to holographic storage media (12), and more specifically to a lens system (11) optimized for an apparatus with a coaxial common aperture arrangement of an object beam and a reference beam.
According to the invention, the lens system (11), which Fourier transforms an object beam and focuses a reference beam into a hologram layer of a holographic storage medium (12), and which focuses a servo beam (17) onto a servo area of the hologram layer, includes a moving part (101, 102, 103) acting on the object beam, the reference beam and the servo beam (17), and a fixed part (104) acting only on the servo beam (17). |
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