Holographic Recording Material Containing Poly-N-vinylcarbazole

Yamagishi, Y.; Ishizuka, Takeshi; Yagishita, Teruo; Ikegami, Kasumi; Okuyama, Hirofumi

doi:10.1117/12.952419

Cited by 4 publications

(3 citation statements)

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“…However, different parameters rendered different output efficiencies and uniformities in the considered FOV. For the out-coupler, four prime factors were analyzed in this section according to the equations in Section 2.3, namely refractive index modulation n Δ [44,45], the thickness of holographic film, d, the incident angle, i ψ , and the diffraction angle, i ϕ .…”

Section: Discussion Of the Configurationmentioning

confidence: 99%

Portable waveguide display system with a large field of view by integrating freeform elements and volume holograms

et al. 2015

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A compact waveguide display system integrating freeform elements and volume holograms is presented here for the first time. The use of freeform elements can broaden the field of view, which limits the applications of a holographic waveguide. An optimized system can achieve a diagonal field of view of 45° when the thickness of the waveguide planar is 3mm. Freeform-elements in-coupler and the volume holograms outcoupler were designed in detail in our study, and the influence of grating configurations on diffraction efficiency was analyzed thoroughly. The offaxis aberrations were well compensated by the in-coupler and the diffraction efficiency of the optimized waveguide display system could reach 87.57%. With integrated design, stability and reliability of this monochromatic display system were achieved and the alignment of the system was easily controlled by the record of the volume holograms, which makes mass production possible.

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Section: Discussion Of the Configurationmentioning

confidence: 99%

Portable waveguide display system with a large field of view by integrating freeform elements and volume holograms

et al. 2015

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“…The material consisting of poly-N-vinylcarbazole (PVCz) is very resistant to humidity [4], though several problems are present themselves. The most serious problem with PVCz holograms is the difficulties in controlling developing conditions.…”

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confidence: 99%

“…The most serious problem with PVCz holograms is the difficulties in controlling developing conditions. PVCz holograms are developed by the same process used in dichromated gelatin: first dipping into good solvent, then into poor solvent [4]. In this process, it is difficult to obtain a large hologram, because the upper area dries more than the lower area when the swollen film is carried to poor solvent.…”

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confidence: 99%

Development process for PVCz hologram.

Yamagishi

Ishitsuka

Yoneda

1991

J. Photopol. Sci. Technol.

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We investigated the formation of index modulation for volume holograms consisting of poly-N-vinylcarbazole (PVCz), and achieved a new process that enables large holograms and uniform quality.Conventionally PVCz holograms are developed by two sequential dipping process: first into good solvent, then into poor solvent. When a swollen PVCz film is dipped into poor solvent, PVCz molecules precipitate into small grains. In the upper layer small grains can pack closely, because the solvent in the film can escape outside.However, the solvent in the lower layer is prevented from escaping by the closely packed upper layer, and the remaining solvent forms gaps corresponding to the degree of swelling. As the result of the difference in swelling between highly exposed and low exposed areas, refractive index modulation appears. Based on the investigation above, we found a new process where the holograms are developed by single dipping process into a mixture of volatile good solvent and nonvolatile poor solvent. When the film swollen by the mixture is carried out, the solvent in the film becomes poor solvent rich and small grains are formed. With this new process all areas of a hologram can be developed under same conditions, so large holograms with uniform quality becomes possible.

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Holographic recording on poly(vinylcarbazole)

Kuwae¹,

Sugawa²,

Taniguchi³

et al. 1990

Makromolekulare Chemie. Macromolecular Symposia

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A reflection type volume‐phase hologram was recorded on poly(vinylcarbazole) (PVCz) in the presence of CI4. The grating with a half‐height width of 19nm was made with an argon ion laser at 488nm or 514. 5nm. The sections of PVCz and a dichromated gelatin (DCG) hologram, responsible for the diffraction efficiency, were observed by scanning electron micrography (SEM) and transmission electron micrography (TEM). Those micrographs showed that the amplitude of the index modulation in the hologram is formed bý voids. The diffraction efficiency was simulated with the parameters observed by TEM and showed that a thin PVCz hologram film attains the same diffraction efficiency as the thick DCG sample, because of the large refractive index of PVCz.

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Holographic Recording Material Containing Poly-N-vinylcarbazole

Cited by 4 publications

References 0 publications

Portable waveguide display system with a large field of view by integrating freeform elements and volume holograms

Portable waveguide display system with a large field of view by integrating freeform elements and volume holograms

Development process for PVCz hologram.

Holographic recording on poly(vinylcarbazole)

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