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US 2003/0112527 A1Published application
Holographic storage lenses
AssigneeInPhase Technologies, Inc.
InventorsKevin Curtis, Jan Hoogland
Life of this patent
Estimating the term…
Abstract
Disclosed are holographic storage systems and lenses for holographic storage systems. The lens units can be of a single-component design. The lenses can be used to both record to photorefractive storage media and to read from photorefractive storage media.
Claims32
A holographic recording system comprising:
- an encoding device;
- a storage medium;
- a single-component lens placed between the encoding device and the storage medium, wherein the single-component lens directs a signal beam encoded by the encoding device onto a pupil plane positioned at the storage medium, and wherein the single-component lens has a pupil aberration that is less than 40% of the on axis pupil radius.
A holographic retrieval system comprising:
- a storage medium;
- a sensor;
- a single-component lens placed between the sensor and the storage medium, wherein the single-component lens focuses a signal beam emanating from the storage medium onto the sensor, and wherein the single-component lens has a pupil aberration that is less than 40% of the on axis pupil radius.
A single-component lens comprising:
- a meniscus-shaped component, wherein the meniscus shaped component has an axial thickness of between 50% and 110% of EFL of the single-component lens, the single-component lens has a pupil separation that is at least 25% of EFL, the single-component lens has an object distance that is at least 100% of EFL from the single-component lens, and wherein single-component lens has a first outside aspheric surface having a curvature and a second outside aspheric surface having a curvature and wherein the sum of the curvature of the first aspheric surface and the curvature of the second aspheric surface is between −0.01 mm−1 and −0.04 mm−1.
Dependencies are inferred from the claim text.