Real-Time Colour Holographic Interferometry (from Holographic Plate to Digital Hologram)

Desse, Jean-Michel

doi:10.5772/19774

Cited by 1 publication

(2 citation statements)

References 41 publications

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“…To record a hologram, the photopolymer was exposed to laser irradiation, causing photopolymerization, which, when initiated by the photoinitiators at the three wavelengths, generate independent grating patterns with different changes of refractive index. During the full-color hologram recording by the wavelength multiplexing technique, similar diffraction efficiencies should be achieved at the three primary wavelengths to represent the required colors in the reconstruction procedure [16,17].…”

Section: Recording Materials For the Hoementioning

confidence: 99%

Full-color holographic diffuser using time-scheduled iterative exposure

et al. 2015

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A compact wavelength multiplexing technique is proposed and experimentally investigated to improve the efficiency of a full-color holographic diffuser using photopolymer. The exposure responses of a monochromatic hologram and a three wavelength multiplexed hologram recorded in photopolymer film are presented. The time-scheduled exposure energies at wavelengths of 633, 532, and 473 nm were chosen to optimize the uniform diffraction efficiency of the wavelength multiplexed hologram. These three wavelength iterative sequences of exposures are applied to achieve a specific color balance for a multicolor holographic diffuser. The experimental results confirm that the fabrication method is well suited to the manufacture of holographic diffusers for full-color display applications.

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Section: Recording Materials For the Hoementioning

confidence: 99%

Full-color holographic diffuser using time-scheduled iterative exposure

et al. 2015

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“…To overcome the above problems, a series of interferometric techniques, including colorimetric interferometry, , multiwavelength interferometry, − phase-shift interferometry, ,− scanning interferometry, , and so on, have been proposed to address the thin-film challenges. Specifically, the colorimetric interferometry focuses on the challenge in the absolute thickness measurement; under the condition of the known relationship between film thickness and interferometric color scale, the film thickness distribution in a certain range can be extracted .…”

Section: Introductionmentioning

confidence: 99%

Full-Field and Quantitative Analysis of a Thin Liquid Film at the Nanoscale by Combining Digital Holography and White Light Interferometry

et al. 2021

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Visualizing and measuring thin-film thickness at the nanoscale during dynamic evolution has been an open challenge for long term. Here, a joint-imaging method and the thereof innovative procedure are presented for merging digital holography (DH) and white light colorimetric interferometry (WLCI) measurement data in a single intelligent tool. This approach allows a complete quantitative study of the dynamic evolution of freestanding thin films under high spatial resolution and full-field modality over a large area. By merging interferometric and holographic fringes, it is possible to overcome the lack of DH in thickness measurements of ultrathin layers, providing a reliable reference for full-field quantitative mapping of the whole film with interferometric accuracy. Thanks to the proposed approach, the time-related and concentration-related evolution of surfactant film thickness can be studied. The thickness distribution curves reveal the small changes in the film thickness with time and concentration. The reported tool opens a route for comprehending deeply the physics behind the behavior of freestanding thin liquid films as it provides an in situ, continuous monitoring of film formation and dynamic evolution without limits of thickness range and in full-field mode. This can be of fundamental importance to many fields of applications, such as fluids, polymers, biotechnology, bottom-up fabrication, etc.

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Real-Time Colour Holographic Interferometry (from Holographic Plate to Digital Hologram)

Cited by 1 publication

References 41 publications

Full-color holographic diffuser using time-scheduled iterative exposure

Full-color holographic diffuser using time-scheduled iterative exposure

Full-Field and Quantitative Analysis of a Thin Liquid Film at the Nanoscale by Combining Digital Holography and White Light Interferometry

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