Using the Talbot Effect for lensless imaging of periodic structu

Optical: systems and elements – Holographic system or element – For producing or reconstructing images from multiple holograms

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359 24, 359 29, 359 30, 359569, 365125, 365216, 369103, G02B 126, G02B 128, G11C 1304

Patent

active

061220817

ABSTRACT:
A holographic memory system which utilizes the Talbot Effect for the lensless, near-field propagation of repeating image planes of periodic structures. Periodic phase structures at one plane in a holographic memory system are mapped to the input amplitude data plane in the holographic memory system. In a preferred embodiment, coherent light is passed through a lenslet array and propagated via the Talbot Effect to self-image coincident on a spatial light modulator that provides the holographic memory system with input data. The lenslet array is located relative to the spatial light modulator such that the desirable phase image structure is self-imaged in its Fresnel region onto the input amplitude data structure.

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patent: 5859808 (1999-01-01), Campbell et al.

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