One-shot digital holography by use of polarization

Nomura, Takanori; Javidi, Bahram; Murata, Shinji; Nitanai, Eiji; Numata, T.

doi:10.1117/12.681519

Cited by 3 publications

(2 citation statements)

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“…1(i). D1 and D2 are assumed to be lossless and are designed to have the well-specified widths and bandwidths 15 listed in Table 1. When the signal passes through D1, the product signal has an increased bandwidth, but the total energy must remain the same.…”

Section: ͑4͒mentioning

confidence: 99%

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Spread-space spread-spectrum technique for secure multiplexing

et al. 2007

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A novel technique for multiplexing complex images is proposed in which each image may be demultiplexed only if a set of random encryption keys is known. The technique utilizes the ability of the double random phase encoding method to spread a signals' energy in both the space and the spatial frequency domains in a controlled manner. To multiplex, images are independently encrypted with different phase keys and then superimposed by recording sequentially on the same material. Each image is extracted by using the particular key associated with it. During decryption the energy from the other images is further spread, making it possible to minimize its effects by using suitable filters. Wigner analysis is applied to the technique, and numerical results are presented.

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Section: ͑4͒mentioning

confidence: 99%

“…The effects of the diffusers on the spatial extent of an input signal and its spatial frequency extent as it evolves through these systems are well known. 15 The WDF allows us to elegantly explain these effects for the purposes of this paper. The WDF of a 1D signal u͑x͒ is given as…”

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confidence: 99%