Holography has a long historical context, first introduced by Gabor. In the introductory article, Gabor introduced holography as a means of improving the resolution of electron microscopes via the recording of interference patterns between sample and reference fields. The phase of the sample field would be embedded within the interference pattern and could then be coaxed out from the recorded hologram in order to produce the whole information of the sample field—namely, the phase and intensity functions. Gabor termed this methodology “holography,” based on the Greek root word “holos,” which means “the whole.”
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