Photopolymer-based volume holographic optical elements: design and possible applications

Bianco, G.; Ferrara, Maria Antonietta; Borbone, Fabio; Roviello, Antonio; Striano, V.; Coppola, Giuseppe

doi:10.2971/jeos.2015.15057

Cited by 24 publications

(22 citation statements)

References 13 publications

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“…Finally, the sol-gel chemistry versatility allows obtaining a high level of interpenetration between the organic and inorganic networks, as reported in Refs. [4,[45][46][47]. Photopolymer with a very low outgassing level and a high resistance to strong thermal excursions, that can be useful for some applications, was obtained by sol-gel techniques [4].…”

Section: Photopolymersmentioning

confidence: 99%

“…Thus, an enhancement of the collected light is desirable. Of course, in the space the holographic materials must be able to withstand much more drastic conditions respect to earth applications, due to strong thermal excursions, high vacuum and the presence of high-energy gamma, electronic and protonic radiation originating from the solar wind [4,46,47].…”

Section: Commercial and Space Holographic Concentratorsmentioning

confidence: 99%

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Volume Holographic Optical Elements as Solar Concentrators: An Overview

Ferrara

Striano²,

Coppola

2019

Applied Sciences

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Generally, to reduce the area of a photovoltaic cell, which is typically very expensive, solar concentrators based on a set of mirrors or mechanical structures are used. However, such solar concentrators have some drawbacks, as they need a tracking system to track the sun’s position and also they suffer for the overheat due to the concentration of both light and heat on the solar cell. The fundamental advantages of volume holographic optical elements are very appealing for lightweight and cheap solar concentrators applications and can become a valuable asset that can be integrated into solar panels. In this paper, a review of volume holographic-based solar concentrators recorded on different holographic materials is presented. The physical principles and main advantages and disadvantages, such as their cool light concentration, selective wavelength concentrations and the possibility to implement passive solar tracking, are discussed. Different configurations and strategies are illustrated and the state-of-the-art is presented including commercially available systems.

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Section: Photopolymersmentioning

confidence: 99%

Section: Commercial and Space Holographic Concentratorsmentioning

confidence: 99%

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Ferrara

Striano²,

Coppola

2019

Applied Sciences

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“…This is mainly due to their versatility both in composition and in design as well as to other interesting properties, such as self-processing capabilities [ 25 ], low cost, good dimensional stability, variable thickness, high energetic sensitivity, large dynamic range, sharp angular selectivity, and flexibility. In this sense, the importance of photopolymers is growing spectacularly [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Holographic Lenses in an Environment-Friendly Photopolymer

et al. 2018

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Abstract:In this paper, we theoretically and experimentally evaluated the quality of volume phase transmission lenses stored in an environmentally friendly photopolymer. Holographic lenses (HLs) were obtained using symmetrical and asymmetrical experimental setups with the same positive and negative focal length and pupil diameter. The image quality was evaluated from the calculation of the modulation transfer function (MTF) by capturing the point spread function (PSF) with a charge-coupled device (CCD). A maximum frequency of 14 L/mm, reaching an MTF value of 0.1, was obtained for a negative asymmetrically recorded HL, evaluated at 473 nm wavelength. A theoretical study of aberrations was carried out to qualitatively evaluate the experimental results obtained.

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“…Obtaining holograms of three-dimensional objects has sparked great worldwide interest. Among the different applications of holography, we can highlight holographic interferometry, which can be used to obtain information from some material properties [ 5 ], the manufacture of lenses [ 6 , 7 ], holographic optical elements (HOEs) [ 8 , 9 , 10 ] or data encryption [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer

et al. 2016

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Holographic transmission gratings with a spatial frequency of 2658 lines/mm and reflection gratings with a spatial frequency of 4553 lines/mm were stored in a polyvinyl alcohol (PVA)/acrylamide (AA) based photopolymer. This material can reach diffraction efficiencies close to 100% for spatial frequencies about 1000 lines/mm. However, for higher spatial frequencies, the diffraction efficiency decreases considerably as the spatial frequency increases. To enhance the material response at high spatial frequencies, a chain transfer agent, the 4,4’-azobis (4-cyanopentanoic acid), ACPA, is added to the composition of the material. Different concentrations of ACPA are incorporated into the main composition of the photopolymer to find the concentration value that provides the highest diffraction efficiency. Moreover, the refractive index modulation and the optical thickness of the transmission and reflection gratings were obtained, evaluated and compared to procure more information about the influence of the ACPA on them.

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Photopolymer-based volume holographic optical elements: design and possible applications

Cited by 24 publications

References 13 publications

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Holographic Lenses in an Environment-Friendly Photopolymer

Influence of 4,4’-azobis (4-cyanopentanoic acid) in Transmission and Reflection Gratings Stored in a PVA/AA Photopolymer

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