Method for Detecting/generating a Plurality of Holograms in a Storage Medium, Device for Detecting and System for Generating a Plurality of Holograms in a Storage Medium

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This invention describes a method, device, and system for generating and detecting multiple holograms in a storage medium, specifically using a microholographic approach. The core concept is to record and retrieve a large number of holograms at various depths and positions within a special storage medium (such as a disk) by utilizing focused light beams (usually lasers) to alter the material's refractive index. Notably, this technique controls and makes use of optical aberrations, allowing high data density without needing expensive, complex optics. The invention also introduces aberration-multiplexing, a novel data storage method where variations in the optical aberrations encode different holograms within the same storage volume.

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• High-capacity optical data storage systems (e.g., next-generation disks, archives)
• Secure data storage where only specially tuned reading devices can access the data, enhancing protection
• Long-term archival systems needing robust and dense storage formats
• Identification or authentication systems using unique holographic patterns
• Applications where rapid, parallel reading and writing of data are advantageous, such as in data centers or high-speed information processing

BenefitsContent extracted from patent full text and abstract with AI.

• Dramatically increases storage density compared to conventional optical media (like CD/DVD/BluRay) by writing data in multiple layers and positions
• Reduces system cost and complexity by allowing use of simpler optical components (such as single aspheric lenses), eliminating the need for complex aberration correction optics
• Improves system reliability by minimizing moving parts and mechanical complexity
• Enables new types of data multiplexing (aberration-multiplexing), further boosting information density
• Potentially enhances data security, as data can only be read with precisely matched optical setups, preventing unauthorized access
• Lowers the required writing energy for holograms, increasing system efficiency and component lifespan

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Patent Abstract

The present invention relates to a method and a device for detecting and/or generating a plurality of holograms. The present invention is based on the aim of disclosing a method and a device (system) for generating and detecting a plurality of holograms, the method and device achieving high storage density with comparatively cost-effective optical components and simplified control. The method according to the invention for generating a plurality of holograms in a storage medium comprises the following steps: providing a storage medium having a storage layer (3), the index of refraction thereof experiencing a change upon irradiation by electromagnetic radiation, focusing and mutual superposition of electromagnetic radiation of a light source (10) such that an interference pattern is implemented because of the mutual superposition in a predefined spatial position (x, y, z) of the storage layer (3) and results in the focus in areas of constructive interference in a stronger change of the index of refraction than in areas of destructive interference, and a hologram having a plurality of layers having alternating indices of refraction is generated because of the index of refraction change, a plurality of holograms being generated in said storage layer (3) in sequence in different lateral positions (x, y) and in different depths (z) of said storage layer (3), the lateral extension of the focuses of said holograms being varied in different depths (z) of said storage layer (3).