Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

holograph

See hologram
holographic data storage
a technique used to store multiple images, or 2-D arrays of digital information, as multiplexed holograms in an optically sensitive material. Multiplexing techniques include angle, frequency, and spatial position. Angle and frequency multiplexing techniques are based on Bragg selectivity where angle multiplexing favors transmission geometries and frequency multiplexing favors reflection geometries.
holographic interconnect
free-space interconnect that uses holograms to control optical paths from sources to detectors. The hologram provides the interconnection by forming the intentionally distorted image of the source array on the detector array. A hologram can be viewed as a combination of gratings. Each grating directs a light beam passing through it to a new direction. The hologram can be displayed by a spatial light modulator to achieve dynamic reconfiguration.
holography
the science of making and reading holograms.
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