A 3-D display using a laser and moving screens

Yamada, Hiroaki; Masuda, Chihiro; Nozaki, Toshihiro; Nishitani, Kimio; Miyaji, Kagami

doi:10.2351/1.5059582

Cited by 2 publications

(2 citation statements)

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“…Although this provides a simple and low cost approach to the implementation of a basic but operational volumetric display, the low fill factor limits its practicality to experimental work (which applies to other architectures where designers have sought to improve display characteristics through a reduction on sweep efficiency). Similar issues arise when image space is formed using the rotational motion of an Archimedes spiral (Yamada et al 1984), and in general terms efforts to improve display performance by reducing the sweep efficiency are unacceptable in commercial systems. The rotational motion of a planar screen provides a mechanically simple and robust approach to image space formation, but can give rise to undesirable characteristics in the region close to the axis of rotation.…”

Section: Attribute Possible Impact Exemplar Causementioning

confidence: 95%

On the Uncertain Future of the Volumetric 3D Display Paradigm

Blundell

2017

3D Res

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Volumetric displays permit electronically processed images to be depicted within a transparent physical volume and enable a range of cues to depth to be inherently associated with image content. Further, images can be viewed directly by multiple simultaneous observers who are able to change vantage positions in a natural way. On the basis of research to date, we assume that the technologies needed to implement useful volumetric displays able to support translucent image formation are available and so primarily focus on other issues that have impeded the broad commercialization and application of this display paradigm. This is of particular relevance given the recent resurgence of interest in developing commercially viable, general purpose, volumetric systems. We particularly consider image and display characteristics, usability issues and identify several advantageous attributes that need to be exploited in order to effectively capitalize on this display modality.

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Section: Attribute Possible Impact Exemplar Causementioning

confidence: 95%

On the Uncertain Future of the Volumetric 3D Display Paradigm

Blundell

2017

3D Res

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“…Measurements of the time-averaged voxel intensity coming from the laser scanner for 19,000 and 38,000 voxel images are 658 aW and 8 nW, respectively. For a spot diameter of 1.7 mm at the helix we have an approximate luminance of 658nW 2 X JL = 1JL (8) irO.85mm 26--for the 19,000 voxels case, and 8nW 2 1JL =o.. (9) irO.85mm 26-----mm2…”

Section: System Performancementioning

confidence: 99%

<title>Laser-projected 3D volumetric displays</title>

Lasher¹,

Soltan²,

Dahike³

et al. 1997

SPIE Proceedings

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A three dimensional volumetric display system utilizing a rotating helical surface is described. The rotating helix system permits images to be displayed in a three-dimensional format that can be observed without the use of special glasses. Its rotating helical screen sweeps out a cylindrical envelope, providing a volumetric display medium through which scanned laser pulses are projected. The light scatters from the surface of the helix so that each voxel appears to emanate from specific points in space. Each point has x-y-coordinates determined by the laser scanner and a z-coordinate determined by the intersection of the laser beam and the helix surface. Display images are created by synchronizing the interaction of the laser pulses and the moving screen to address a full three-dimensional volume that gives the viewer true depth cues (binocular parallax, accommodation, convergence) without the need for any special viewing aids. We describe recent work on the development of mechanical, optical, electronic, and software engineering for a display system based on a 36-inch diameter helix using high speed, multichannel, random access laser scanners. Color images are created using red, green and blue laser sources. The system is capable of displaying 800,000 voxels per second, per color. A portable, 12-inch diameter, translucent helix system is also presented.

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A 3-D display using a laser and moving screens

Cited by 2 publications

References 1 publication

On the Uncertain Future of the Volumetric 3D Display Paradigm

On the Uncertain Future of the Volumetric 3D Display Paradigm

<title>Laser-projected 3D volumetric displays</title>

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