Celebrating holography anniversaries: a historical perspective

Vázquez, Augusto Beléndez; Sheridan, John T.; Pascual, Inmaculada

doi:10.1117/12.2626920

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…Since the invention of holography in 1948, 1 the study of photosensitive materials and their possible applications has been one of the main branches of research in this field. There is no material that meets all the requirements for any given application.…”

Section: Introductionmentioning

confidence: 99%

Chromatic selectivity study in Bayfol HX200 multiplexed-reflection holograms in multilayer systems

García-Vázquez,

Mas-Abellán,

Gutiérrez Ramírez

et al. 2024

Photosensitive Materials and Their Applications III

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In this work, reflection gratings has been stored in Bayfol X200 from Covestro. Up to two high-efficiency reflection holograms have been multiplexed in the same layer due to the physical thickness of the material films, 16 µm. The less material thickness, the fewer number of high diffraction efficiency multiplexed holograms we can store in it. Once multiplexed the pairs of holograms at different recording angles we have stuck several layers together, forming a multilayer system. From this multilayer system, we have obtained a wide diffracted spectrum were the result is the superposition of all the multiplexed gratings recorded in each layer. Therefore, this system has a good chromatic selectivity and allows us to select the reflected wavelengths and the spectral wide for each application.

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Section: Introductionmentioning

confidence: 99%

Chromatic selectivity study in Bayfol HX200 multiplexed-reflection holograms in multilayer systems

García-Vázquez,

Mas-Abellán,

Gutiérrez Ramírez

et al. 2024

Photosensitive Materials and Their Applications III

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“…Dennis Gabor invented holography in 1947 [1][2]. In 1956, after just the initial steps, he claimed "I am quite happy to let Diffraction Microscopy die a natural death.…”

Section: Introductionmentioning

confidence: 99%

Study of the conservation of different holograms sandwiched between glasses

Sirvent-Verdú,

García-Vázquez,

Gallego Rico

et al. 2023

Holography: Advances and Modern Trends VIII

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Photopolymers are designed and engineered with versatile applications including optics and photonics. Holography is one of the classical porpoises that use photopolymers as holographic recording materials. The success of these materials can be seen in the market with the photopolymer fabricated by Covestro. Some of these holographic applications require a long-time life of the holograms recorded in photopolymers. Nevertheless, initial tests of Covestro holograms show significant degradation after less than one year of exposure even after sealing and degradation occurs under solar light exposition. In this sense, it is important to perform deeper studies of the different possibilities for hologram conservation. Usually, the first step after recording is the material cure, with UV or visible light, to eliminate the residual dye and monomer. With this process high efficiency holograms can also be obtained. Afterwards, an index matching technique can be used to cover the material with a glass or it is possible the application of aerosol sealant.In this paper we analyze the introduction of holograms between two glasses linked by pressure, using Bayfol HX 200 from Covestro as the recording material. In order to characterize the process, four different spatial frequencies were tested, which were stored either by transmission or reflection schemes. The data of the reconstruction step has been measured before and after the encapsulation. In addition, multiple holograms have been superposed in the same glass, where we have found that shrinkage is more significant.

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Celebrating holography anniversaries: a historical perspective

Cited by 2 publications

References 25 publications

Chromatic selectivity study in Bayfol HX200 multiplexed-reflection holograms in multilayer systems

Chromatic selectivity study in Bayfol HX200 multiplexed-reflection holograms in multilayer systems

Study of the conservation of different holograms sandwiched between glasses

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