Process for holography involving tilt compensation
AssigneeLucent Technologies Inc.
InventorsKevin Richard Curtis, Michael C Tackitt
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Abstract
The invention involves a holographic system containing a photopolymer-type storage medium located in the system's optical path, where the medium is rotated around a first axis such that the surface of the medium is in a non-orthogonal relationship with the optical path, and a spatial light modulator also located in the optical path, where the modulator is rotated around a second axis that is substantially orthogonal to the first axis, and wherein the surface of the modulator is in a non-orthogonal relationship with the optical path. This arrangement compensates for at least a portion of aberration introduced by the photopolymer media, thereby allowing presentation of a flatter, more focused, and less distorted image at the sensor.
Claims12
A holographic system, comprising:
- a. a laser having its output directed along an optical path,
- b. a storage medium, wherein the medium is located in the optical path, and wherein the medium is rotated around a first axis such that the surface of the medium is in a non-orthogonal relationship with the optical path;
- and
- c. a spatial light modulator, wherein the modulator is located in the optical path, wherein the modulator is rotated around a second axis that is substantially orthogonal to the first axis, and wherein the surface of the modulator is in a non-orthogonal relationship with the optical path.
A process for holography, comprising the steps of:
- a. providing a holographic system comprising a laser having its output defining an optical path, a storage medium, a spatial light modulator, and a detector, wherein the storage medium, the spatial light modulator, and the detector are located in the optical path of the laser;
- b. providing the medium with a rotation around a first axis such that the surface of the medium is in a non-orthogonal relationship with the optical path;
- c. providing the spatial light modulator with a rotation around a second axis that is substantially orthogonal to the first axis such that the surface of the modulator is in a non-orthogonal relationship with the optical path;
- and
- d. directing the output of the laser at the spatial light modulator.
Dependencies are inferred from the claim text.