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A volumetric three-dimensional digital light photoactivatable dye display

zhpd55 添加于 2017/7/12 10:40:49  622次阅读 | 0次推荐 | 0个评论

Volumetric three-dimensional displays offer spatially accurate representations of images with a 360° view, but have been difficult to implement due to complex fabrication requirements. Herein, a chemically enabled volumetric 3D digital light photoactivatable dye display (3D Light PAD) is reported. The operating principle relies on photoactivatable dyes that become reversibly fluorescent upon illumination with ultraviolet light. Proper tuning of kinetics and emission wavelengths enables the generation of a spatial pattern of fluorescent emission at the intersection of two structured light beams. A first-generation 3D Light PAD was fabricated using the photoactivatable dye N-phenyl spirolactam rhodamine B, a commercial picoprojector, an ultraviolet projector and a custom quartz imaging chamber. The system displays a minimum voxel size of 0.68 mm3, 200 μm resolution and good stability over repeated ‘on-off’ cycles. A range of high-resolution 3D images and animations can be projected, setting the foundation for widely accessible volumetric 3D displays.

作 者:Shreya K. Patel, Jian Cao, Alexander R. Lippert
期刊名称: Nature Communications
期卷页: Published online: 11 July 2017 第8卷 第期 Article number: 15239 页
学科领域:数理科学 » 物理学 » 光学
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原文链接:https://www.nature.com/articles/ncomms15239
DOI: 10.1038/ncomms15239
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备 注: A scientist's dream of 3-D projections like those he saw years ago in a Star Wars movie has led to new technology for making animated 3-D table-top objects by structuring light. The new technology uses photoswitch molecules to bring to life 3-D light structures that are viewable from 360 degrees, says chemist Alexander Lippert, Southern Methodist University, Dallas, who led the research. The economical method for shaping light into an infinite number of volumetric objects would be useful in a variety of fields, from biomedical imaging, education and engineering, to TV, movies, video games and more. "Our idea was to use chemistry and special photoswitch molecules to make a 3-D display that delivers a 360-degree view," Lippert said. "It's not a hologram, it's really three-dimensionally structured light." Key to the technology is a molecule that switches between non-fluorescent and fluorescent in reaction to the presence or absence of ultraviolet light. The new technology is not a hologram, and differs from 3-D movies or 3-D computer design. Those are flat displays that use binocular disparity or linear perspective to make objects appear three-dimensional when in fact they only have height and width and lack a true volume profile.
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