Holographic recordings with high beam ratios on improved Bayfol<sup>®</sup>HX photopolymer

Berneth, Horst; Bruder, Friedrich‐Karl; Fäcke, Thomas; Hagen, Rainer; Hönel, Dennis; Rölle, Thomas; Walze, Günther; Weiser, Marc‐Stephan

doi:10.1117/12.2018618

Cited by 22 publications

(16 citation statements)

References 10 publications

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“…These new instant developing recording media open up new opportunities to create vHOEs for new diffractive optics and have proven to be able to record predictable and reproducible optical properties. This was demonstrated recently also for transmission holograms and directional diffusors [5][6][7][8][9].…”

Section: Photopolymeric Materials Characterizationmentioning

confidence: 72%

“…The newly [4][5][6] developed photopolymer film technology (Bayfol ® HX film) evolved from efforts in holographic data storage (HDS) [4][5][6][7] where any form of post processing is unacceptable. These new instant developing recording media open up new opportunities to create vHOEs for new diffractive optics and have proven to be able to record predictable and reproducible optical properties.…”

Section: Photopolymeric Materials Characterizationmentioning

confidence: 99%

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Photopolymer materials for volume phase holographic optical elements

Zanutta

Orselli

Fäcke

et al. 2017

International Conference on Space Optics — ICSO 2016

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Section: Photopolymeric Materials Characterizationmentioning

confidence: 72%

Section: Photopolymeric Materials Characterizationmentioning

confidence: 99%

Photopolymer materials for volume phase holographic optical elements

Zanutta

Orselli

Fäcke

et al. 2017

International Conference on Space Optics — ICSO 2016

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“…These new instant developing recording media open up new opportunities to create vHOEs for new diffractive optics and have proven to be able to record predictable and reproducible optical properties. This was demonstrated recently for transmission holograms and directional diffusors 8,11 .…”

Section: New Photopolymer Materials Provide Consistent Recording Resumentioning

confidence: 88%

Edge-lit volume holograms recorded by free space exposure: diffraction by 2^ndHarmonics in Bayfol HX film

et al. 2015

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Miniaturization of optical components, specifically the reduction in thickness created by using planar optical devices, makes light manipulation by diffraction more and more attractive. Optical gratings based on volume Holographic Optical Elements (vHOEs) have the advantage over surface gratings as they reconstruct only a single diffraction order and hence provide high diffraction efficiencies, selectivity and remain fully transparent in the off-Bragg condition.Guiding light inside an optically transparent medium by total internal reflection (TIR) is common and useful in thin planar optical devices. vHOEs offer unique ways to create selective in-and out-coupling of TIR light. As such vHOEs typically have to be recorded in an edge-lit configuration as the necessary high diffraction angles could not be generated by two free-space beams outside the medium. To record such an edge-lit vHOE, bulky recording blocks or liquid baths are used in complex and hard to align recording setups.We present in this paper our findings to use instant-developing photopolymer film (Bayfol ® HX) to generate 2 nd harmonics in the index profile of phase gratings while using free-space recording setups. Those 2 nd harmonic components enable the vHOE to diffract at such large angles that they replay in an edge-lit configuration. We will discuss in this paper selected materials and beneficial recording parameters to tune the diffraction efficiency towards 2 nd harmonic replay. By this -in reported specific cases -the cumbersome and complex edge-lit recording can be substituted by easy-to-use free-space setups. This process significantly simplifies master recordings for vHOEs with edge-lit functionalities which later can be used in contact copy schemes for mass replication.

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“…It is matter of ongoing development to further increase the diffusivity D of the monomers to also increase n1 even if P is increased and/or SF is decreased. First results for newly developed materials have been presented before 13 . A comparison for recording parameters in established materials and the new development grade material is given in Table 1.…”

Section: Power Density Response Of the Optimized Bayfol ® Hx Film Gramentioning

confidence: 98%

Diffractive optics in large sizes: computer-generated holograms (CGH) based on Bayfol HX photopolymer

et al. 2015

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Volume Holographic Optical Elements (vHOE) offer angular and spectral Bragg selectivity that can be tuned by film thickness and holographic recording conditions. With the option to integrate complex optical function in a very thin plastic layer formerly heavy refractive optics can be made thin and lightweight especially for large area applications like liquid crystal displays, projection screens or photovoltaic. Additionally their Bragg selectivity enables the integration of several completely separated optical functions in the same film. The new instant developing photopolymer film (Bayfol ® HX) paves the way towards new cost effective diffractive large optics, due to its easy holographic recording and environmental stability. A major bottleneck for large area applications has been the master hologram recording which traditionally needs expensive, large high precision optical equipment and high power laser with long coherence length. Further the recording setup needs to be rearranged for a change in optical design. In this paper we describe an alternative method for large area holographic master recording, using standard optics and low power lasers in combination with an x, y-translation stage. In this setup small sub-holograms generated by a phase only spatial light modulator (SLM) are recorded next to each other to generate a large size vHOE. The setup is flexible to generate various types of HOEs without the need of a change in the mechanical and optical construction by convenient SLM programming. One Application example and parameter studies for printed vHOEs based on Bayfol ® HX Photopolymer will be given.

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Holographic recordings with high beam ratios on improved Bayfol^®HX photopolymer

Cited by 22 publications

References 10 publications

Photopolymer materials for volume phase holographic optical elements

Photopolymer materials for volume phase holographic optical elements

Edge-lit volume holograms recorded by free space exposure: diffraction by 2^ndHarmonics in Bayfol HX film

Diffractive optics in large sizes: computer-generated holograms (CGH) based on Bayfol HX photopolymer

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Holographic recordings with high beam ratios on improved Bayfol®HX photopolymer

Cited by 22 publications

References 10 publications

Photopolymer materials for volume phase holographic optical elements

Photopolymer materials for volume phase holographic optical elements

Edge-lit volume holograms recorded by free space exposure: diffraction by 2ndHarmonics in Bayfol HX film

Diffractive optics in large sizes: computer-generated holograms (CGH) based on Bayfol HX photopolymer

Contact Info

Product

Resources

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Holographic recordings with high beam ratios on improved Bayfol^®HX photopolymer

Edge-lit volume holograms recorded by free space exposure: diffraction by 2^ndHarmonics in Bayfol HX film