A vergence accommodation conflict-free virtual reality wearable headset

Charrière, Simon; Duveau, Louis

doi:10.1117/12.2315620

Cited by 2 publications

(2 citation statements)

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“…Em condições normais, estes dois estímulos estão sempre em correspondência na percepção humana; porém a renderização estéreo de imagens em sistemas de RVI, com a finalidade de proporcionar percepção visual estéreo dos ambientes virtuais, introduz uma discrepância perceptual na qual a acomodação dos olhos corresponde à distância óptica real até um objeto físico, a tela, enquanto a sua vergência depende da distância virtual de um objeto apresentado em estéreo. Esta discrepância pode provocar desconforto no uso de simulações e até mesmo efeitos colaterais mais severos, como a perda prolongada da percepção de profundidade (CARNEGIE;RHEE, 2015;CHARRIÈRE;DUVEAU, 2018).…”

Section: Estímulos Visuaisunclassified

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Tecnologias imersivas na educação: estudos de caso de aplicação de realidade virtual para aprendizado e treinamento na educação superior.

Moreira¹

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Virtual Reality technologies are becoming more accessible, in terms of financial costs, but also considering ergonomical and technical barriers for their implementation and use. Therefore, we intend here to explore the potential of VR-based immersive environments as resources for both instructional and training uses in general, as those offer possibilities to place students in realistic virtual contexts, at a low cost and in a safe manner. And to contribute so that the use of immersive technologies in education is done in adequate and effective ways, it befalls the academic community to produce studies that highlight impacts, potentials and limitations in the use of these technologies for educational purposes. Aiming to contribute to this body of research, this project has conducted two case studies, one in an immersive lecture format (Immersive Lecture), and another as an immersive training format (Immersive Training).For the Immersive Lecture study, the content "Illumination Models in Computer Graphics" was developed, while for the Immersive Training study, the dental anesthesia simulator "VIDA Odonto" was utilized. Both environments were developed at Interlab-USP with the author's participation.In these studies we aim to explore possible effects on the perception of presence when different degrees of immersive media and user interfaces are applied, as well as to establish metrics and attribute measurements to other relevant factors to the learning experience, such as the ergonomy and usability of the tools.

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Section: Estímulos Visuaisunclassified

“…Por exemplo, os displays 3D de múltiplos planos focais, ou ainda espacialmente deformáveis, e até a renderização direta sobre a retina dos olhos (CHARRIÈRE; DUVEAU, 2018;KRAMIDA, 2016;RYANA;MACKENZIEA, 2012).…”

Section: Estímulos Visuaisunclassified

Tecnologias imersivas na educação: estudos de caso de aplicação de realidade virtual para aprendizado e treinamento na educação superior.

Moreira¹

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Dynamic control of defocus, astigmatism, and tilt aberrations with a large area foveal liquid crystal lens

Louis,

Tigran

2024

Appl. Opt.

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We have recently reported the dynamic adjustment of the focal length in an electrically tunable liquid crystal “foveal” lens, the center of which can be shifted over a large working area. In the present work, we show that this design allows also the independent generation of astigmatism with arbitrary axis and tilt of the light wavefront by simply changing the phase and the voltage differences between 4 control electrodes. Furthermore, we also demonstrate the capability of generating highly localized negative (defocusing) lenses with the same device by using a dual frequency liquid crystal.

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A vergence accommodation conflict-free virtual reality wearable headset

Cited by 2 publications

References 3 publications

Tecnologias imersivas na educação: estudos de caso de aplicação de realidade virtual para aprendizado e treinamento na educação superior.

Tecnologias imersivas na educação: estudos de caso de aplicação de realidade virtual para aprendizado e treinamento na educação superior.

Dynamic control of defocus, astigmatism, and tilt aberrations with a large area foveal liquid crystal lens

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