Results 1 to 10 of about 25,600 (199)

Wavefront-aberration-tolerant diffractive deep neural networks using volume holographic optical elements [PDF]

Scientific Reports
As the demand for computational performance in artificial intelligence (AI) continues to increase, diffractive deep neural networks (D2NNs), which can perform AI computing at the speed of light by repeated optical modulation with diffractive optical ...
Ikuo Hoshi, Koki Wakunami, Yasuyuki Ichihashi, Ryutaro Oi   +3 more
doaj   +2 more sources

An efficient and wide angle coupling of light to a thin film holographic optical element [PDF]

Scientific Reports
In this paper, a new method is proposed to achieve wide-angle and efficient coupling of light into a thin film, holographic optical element (HOE). The coupling is based on diffraction of light (the probe beam) by a holographic element.
Mei-Li Hsieh, Zih Fan Chen, Shiuan-Huei Lin, Shawn-Yu Lin   +3 more
doaj   +2 more sources

Holographic Optical Lenses Recorded on a Glassy Matrix-Based Photopolymer for Solar Concentrators

Photonics, 2021
Global warming is a very topical issue, therefore the search for new renewable energy sources is considered of fundamental importance. Among these, solar energy offers great possibilities considering that the amount of sunlight hitting the Earth ‘s ...
Maria Antonietta Ferrara, Fabio Borbone, Giuseppe Coppola   +2 more
doaj   +1 more source

Holography with high-power CW coherent terahertz source: optical components, imaging, and applications

Light: Advanced Manufacturing, 2022
This paper presents the results of 15 years of studies in the field of terahertz holography at the Novosibirsk free electron laser. They cover two areas: research on obtaining holographic images in the terahertz range and the use of diffractive optical ...
Yulia Choporova, Boris Knyazev, Vladimir Pavelyev   +2 more
doaj   +1 more source

Lightguide type Maxwellian near-eye display with enlarged horizontal field of view by optical reconfiguration of input image

Journal of Information Display, 2022
We present a novel design of the lightguide type optical see-through Maxwellian near-eye display. The proposed display reconfigures vertically long input images to horizontally long output images for wide horizontal viewing-angle.
Woongseob Han, Jae-Min Jeon, Myeong-Ho Choi, Jae-Hyeung Park   +3 more
doaj   +1 more source

Development and Testing of a Dual-Wavelength Sensitive Photopolymer Layer for Applications in Stacking of HOE Lenses

Applied Sciences, 2021
Diffractive optical elements (DOEs) have been in development for many years and are an exciting technology with the capability to re-direct light, using diffraction rather than refraction.
Sanjay Keshri, Brian Rogers, Kevin Murphy, Kevin Reynolds, Izabela Naydenova, Suzanne Martin   +5 more
doaj   +1 more source

Image Quality for Near-Eye Display Based on Holographic Waveguides

Applied Sciences, 2022
The paper analyzes the image quality in augmented reality display based on holographic waveguides. Brightness, brightness non-uniformity, image noise, etc., depend on the parameters of the waveguide substrate, the configuration, and the relief shape of ...
Artem Solomashenko, Dmitrii Lushnikov, Maria Shishova, Olga Afanaseva, Evgenii Zlokazov   +4 more
doaj   +1 more source

Photopolymer-based volume holographic optical elements: design and possible applications [PDF]

Journal of the European Optical Society-Rapid Publications, 2015
In this paper, Volume Holographic Optical Elements (V-HOEs), such as holographic gratings and spherical lenses, are designed and fabricated by using a prototype of photopolymer.
Bianco G., Ferrara M. A., Borbone F., Roviello A., Striano V., Coppola G.   +5 more
doaj   +1 more source

Multilayer Smart Holographic Label with Integrated RFID for Product Security and Monitoring

Micromachines, 2023
Counterfeiting presents a major economic problem and an important risk for the public health and safety of individuals and countries. To make the counterfeiting process more difficult, and to ensure efficient authentication, a solution would be to attach
Cătălin Pârvulescu, Veronica Anăstăsoaie, Roxana Tomescu, Martino Aldrigo, Dana Cristea   +4 more
doaj   +1 more source

Metasurface-Based Holographic Display With All-Dielectric Meta-Axilens

IEEE Photonics Journal, 2021
In a classical metasurface-based holographic display system, a clear holographic reconstruction image can be obtained only in the back-focal-plane of the lens. However, when the receiving plane deviates from the focal plane, the reconstructed holographic
Chuan Shen, Rulin Xu, Jiali Sun, Zhuang Wang, Sui Wei   +4 more
doaj   +1 more source