Researchers use smartphone display screen to create 3D layered holographic photos

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Researchers use smartphone screen to create 3D layered holographic images
Researchers developed a 3D full-color show technique that makes use of a smartphone display screen, fairly than a laser, to create holographic photos. Proven are their experimental outcomes, by which a steady transition from the primary layer to the second layer is observable. Credit score: Ryoichi Horisaki, The College of Tokyo

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Researchers developed a 3D full-color show technique that makes use of a smartphone display screen, fairly than a laser, to create holographic photos. Proven are their experimental outcomes, by which a steady transition from the primary layer to the second layer is observable. Credit score: Ryoichi Horisaki, The College of Tokyo

Researchers have developed a 3D full-color show technique that makes use of a smartphone display screen fairly than a laser to create holographic photos. With additional improvement, the brand new method might be helpful for augmented or digital actuality shows.

Whether or not augmented and digital actuality shows are getting used for gaming, training, or different functions, incorporating 3D shows can create a extra reasonable and interactive consumer expertise.

“Though holography methods can create a really real-looking 3D illustration of objects, conventional approaches aren’t sensible as a result of they depend on laser sources,” mentioned analysis workforce chief Ryoichi Horisaki from The College of Tokyo in Japan. “Lasers emit coherent mild that’s straightforward to manage, however they make the system complicated, costly, and probably dangerous to the eyes.”

In Optics Letters, the researchers describe their new technique, which is predicated on computer-generated holography (CGH). Because of a brand new algorithm they developed, they had been in a position to make use of solely an iPhone and an optical element referred to as a spatial mild modulator to breed a 3D coloration picture that consisted of two holographic layers.

“We consider that this technique might finally be helpful for minimizing the optics, lowering prices, and lowering the potential hurt to eyes in future visible interfaces and 3D show functions,” mentioned Otoya Shigematsu, the paper’s first writer. “Extra particularly, it has the potential to reinforce the efficiency of near-eye shows, corresponding to those being utilized in high-end digital actuality headsets.”


The researchers used solely an iPhone and an optical element referred to as a spatial mild modulator to breed a 3D coloration picture that consisted of two holographic layers. The video reveals their experimental outcomes, by which a steady transition from the primary layer to the second layer might be seen. Credit score: Ryoichi Horisaki, The College of Tokyo

A extra sensible method

Though CGH makes use of algorithms to supply photos, coherent mild from a laser is often required to show these holographic photos. In a earlier examine, the researchers confirmed that spatiotemporally incoherent mild emitted from a white chip-on-board light-emitting diode might be used for CGH. Nonetheless, this setup required two spatial mild modulators—units that management the wavefronts of sunshine—which is impractical due to their expense.

Within the new examine, the researchers developed a inexpensive and extra sensible incoherent CGH technique. “This work aligns with our laboratory’s deal with computational imaging, a analysis discipline devoted to innovating optical imaging programs by integrating optics with data science,” mentioned Horisaki. “We deal with minimizing optical elements and eliminating impractical necessities in typical optical programs.”

The brand new method passes mild from the display screen by a spatial mild modulator, which presents a number of layers of a full-color 3D picture. Though this will likely appear easy, it required rigorously modeling the incoherent mild propagation course of from the display screen after which utilizing this data to develop a brand new algorithm that coordinated the sunshine coming from the gadget display screen with a single spatial mild modulator.

Holographic photos from a smartphone

“Holographic shows that use low-coherence mild might allow reasonable 3D shows whereas probably lowering prices and complexity,” mentioned Shigematsu. “Though a number of teams, together with ours, have demonstrated holographic shows utilizing low-coherence mild, we took this idea to the acute through the use of a smartphone show.”

To display the brand new technique, the researchers created a two-layer optical copy of a full-color 3D picture by displaying one holographic layer on the display screen of an iPhone 14 Professional and a second layer on a spatial mild modulator. The ensuing picture measured just a few millimeters on both sides.

The researchers are actually working to enhance the know-how in order that it will probably show bigger 3D photos with extra layers. Further layers would make photos look extra reasonable by bettering spatial decision and permitting objects to seem at a number of totally different depths, or distances, from the viewer.

Extra data:
Otoya Shigematsu et al, Pc-generated holography with strange show, Optics Letters (2024). DOI: 10.1364/OL.516005

Journal data:
Optics Letters

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