Phase shifting element for optical information processing storing systems
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United States of America Patent
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Aug 28, 2001
Grant Date -
N/A
app pub date -
Mar 30, 1998
filing date -
Mar 30, 1998
priority date (Note) -
Expired
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Abstract
Optical information processor and storage of pixelated data pattern in a Fourier plane of a lens as achieved by a plurality of optical elements operating with a spatial light modulator. A laser light source illuminates a data pattern with a wavefront that is created by a phase mask to effect a phase shift. The optical information can be effecitvely processed or stored, for instance, in a holographic data storage system. The holographic data storage system for storing a data array contains illuminated and dark regions including a multi-fold phase shift mask. This affects a linear and non-random shift of an image. The image is stored on a holographic storage medium. There is a spatial light modulator between the input location for the optical data and the storage medium. The phase shift is effected in the Fourier plane.
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