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US 2003/0189740 A1Published application
Holographic storage lenses
AssigneeInPhase Technologies, Inc.
InventorsJan Hoogland, Kevin Curtis
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 two-component design. The lenses can be used to both record to photorefractive storage media and to read from photorefractive storage media.
Claims28
A holographic recording system comprising:
- an encoding device;
- a storage medium;
- a two-component lens unit placed between the encoding device and the storage medium, wherein the two-component lens unit directs a signal beam encoded by the encoding device onto a pupil plane positioned at the storage medium, and wherein the two-component lens unit 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 two-component lens unit placed between the sensor and the storage medium, wherein the two-component lens unit focuses a signal beam emanating from the storage medium onto the sensor, and wherein the two-component lens unit has a pupil aberration that is less than 40% of the on axis pupil radius.
A two-component lens unit comprising:
- a first lens component and a second lens component, wherein the two-component lens unit has a pupil distance that is at least 30% of EFL, a back focal length that is at least 30% of EFL, and a meniscus shaped lens element with an optical power of between −0.003 and 0.011 when scaled to an EFL of 100 mm.
Dependencies are inferred from the claim text.