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Light source optimization for partially coherent holographic displays with consideration of speckle contrast, resolution, and depth of field.

ABSTRACT: Speckle reduction is an important topic in holographic displays as speckles not only reduce signal-to-noise ratio but also possess an eye-safety issue. Despite thorough exploration of speckle reduction methods using partially coherent light sources, the trade-off involved by the partial coherence has not been thoroughly discussed. Here, we introduce theoretical models that quantify the effects of partial coherence on the resolution and the speckle contrast. The theoretical models allow us to find an optimal light source that maximizes the speckle reduction while minimizing the decline of the other terms. We implement benchtop prototypes of partially coherent holographic displays using the optimal light source, and verify the theoretical models via simulation and experiment. We also present a criterion to evaluate the depth of field in partially coherent holographic displays. We conclude with a discussion about approximations and limitations inherent in the theoretical models.

SUBMITTER: Lee S

PROVIDER: S-EPMC7606540 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Light source optimization for partially coherent holographic displays with consideration of speckle contrast, resolution, and depth of field.

Lee Seungjae S Kim Dongyeon D Nam Seung-Woo SW Lee Byounghyo B Cho Jaebum J Lee Byoungho B

Scientific reports 20201102 1

Speckle reduction is an important topic in holographic displays as speckles not only reduce signal-to-noise ratio but also possess an eye-safety issue. Despite thorough exploration of speckle reduction methods using partially coherent light sources, the trade-off involved by the partial coherence has not been thoroughly discussed. Here, we introduce theoretical models that quantify the effects of partial coherence on the resolution and the speckle contrast. The theoretical models allow us to fin ...[more]

PMID: 33139826

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Dataset Information

Light source optimization for partially coherent holographic displays with consideration of speckle contrast, resolution, and depth of field.

Publications

Light source optimization for partially coherent holographic displays with consideration of speckle contrast, resolution, and depth of field.

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