Latest Publications on Optics
This is our latest selection of worldwide publications on Optics, between many scientific online journals, classified and focused on optics, diffraction, optical resolution, polarisation, laser, Kapitsa–Dirac, optical instrument and photon.
Tip: Further to this selection on Optics, you can search and filter our > publication database < by author, topic, keywords, date or journal.
Mechanism of Free Silver Formation While Preparing Silver-Coated Copper Powder by Chemical Plating and Its Control
On 2025-02-03 by Junquan Chen, Xiaoyun Zhu, Nan Yang, Xiang Li, Bingzhe Yang @MDPI
Keywords: formation, chemical plating, silver-coated, mechanism, control
AI summary: Understanding free silver formation in chemical silver-coated copper powder production through investigation of reaction parameters and characterization techniques. Testing the influence of complexing agent, reaction temperature, main salt drop acceleration rate, and dispersant concentration on the generation of free silver.
Abstract: When silver-coated copper powder is produced through chemical plating, free silver is often formed, which not only lowers coating quality but also increases the consumption of silver salt. Therefore, understanding the mechanism of free silver formation during the chemical plating process is essential for improving this process and enhancing the quality of silver-coated copper powder. This paper investigates the contents of free silver as well as the morphology and properties of the powder under [...]
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Research on Laser Cladding Inconel 625 Coating Process for TRT Blades
On 2025-02-03 by Jian-Tao Yao, Guo-Dong Zhang, Ze-Lin Chen, Yu-Hu Qu, Li-Shuang Wang, Hui Dong @MDPI
Keywords: laser cladding, Inconel 625, coating process, TRT blades, corrosion resistance
AI summary: Research on laser cladding Inconel 625 coating for TRT blades. Coatings adjusted by varying laser power, scanning speed, and overlap rate. Results show improved impact resistance and reduced self-corrosion current density. Practical technical guidance provided for the repair and enhancement of blade properties.
Abstract: In this study, Inconel 625 coatings were deposited onto the surface of 2Cr13 stainless steel via laser cladding technology to ensure their corrosion resistance and mechanical properties. The microstructure and characteristics of coatings were adjusted by varying laser power (1200, 1500, and 1800 W), scanning speed (10, 15, and 25 mm/s), and overlap rate (40%, 50%, and 70%). The results showed that the impact resistance of blades was improved by 23% to 30% compared to the substrate, whereas the s[...]
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Design of Bilayer Crescent Chiral Metasurfaces for Enhanced Chiroptical Response
On 2025-02-03 by Semere A. Asefa, Myeongsu Seong, Dasol Lee @MDPI
Keywords: chiral metasurfaces, crescent chiral, chiroptical response, optical devices, electric field distribution
AI summary: Design of crescent chiral metasurfaces for enhanced chiroptical response, Study explores chiroptical properties of bilayer metasurface, Demonstrates impact of rotation angle on chiroptical response, Highlights importance of unit cell arrangement for optimized chiroptical properties.
Abstract: Chiral metasurfaces exploit structural asymmetry to control circular polarized light, presenting new possibilities for the design of optical devices, specifically in the dynamic control of light and enhanced optical sensing fields. This study employed theoretical and computational methods to examine the chiroptical properties of a bilayer crescent chiral metasurface, demonstrating the effect of the angle of rotation on the chiroptical response. We particularly investigated the changes in transmi[...]
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Perceived Brightness and Resolution of Holographic Augmented Reality Retinal Scan Glasses
On 2025-02-03 by Maximilian Rutz, Pia Neuberger, Simon Pick, Torsten Straßer @MDPI
Keywords: brightness, resolution, holographic, retinal scan, augmented reality
AI summary: Perceived brightness and resolution are crucial for holographic augmented reality retinal scan glasses. Human-centered approaches are essential for evaluating display performance. A theoretical formula is presented for retinal scan luminance and contrast ratio. Psychophysical experiments are conducted to assess perceived resolution in augmented reality settings.
Abstract: Augmented reality display performance depends strongly on features of the human visual system. This is especially true for retinal scan glasses, which use laser beam scanning and transparent holographic optical combiners. Human-centered approaches allow us to go beyond conventional optical metrology and evaluate display performance as it is perceived in actual augmented reality use cases. Here, we first present a theoretical formula for the retinal scan luminance and ambient contrast ratio calcu[...]
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Assessing the Relationship Between Cerebral Metabolic Rate of Oxygen and Redox Cytochrome C Oxidase During Cardiac Arrest and Cardiopulmonary Resuscitation
On 2025-02-03 by Nima Soltani, Rohit Mohindra, Steve Lin, Vladislav Toronov @MDPI
Keywords: brain oxygen metabolism, cerebral metabolic rate of oxygen, redox cytochrome c oxidase, cardiac arrest, cardiopulmonary resuscitation
AI summary: Assessing brain oxygen metabolism during cardiac arrest and CPR using advanced techniques. Evaluating the relationship between cerebral metabolic rate of oxygen and redox cytochrome c oxidase in pigs. Revealing a non-linear relationship between rCCO and CMRO2. Contributing to a deeper understanding of brain oxygen management during critical episodes.
Abstract: Evaluating brain oxygen metabolism during cardiac arrest and cardiopulmonary resuscitation (CPR) is essential for improving neurological outcomes and guiding clinical interventions in high-stress medical emergencies. This study focused on two key indicators of brain oxygen metabolism: the cerebral metabolic rate of oxygen (CMRO2) and the oxidation state of redox cytochrome c oxidase (rCCO). Using advanced techniques such as hyperspectral near-infrared spectroscopy (hNIRS) and laser Doppler flowm[...]
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An Integrated Method for Inverting Beach Surface Moisture by Fusing Unmanned Aerial Vehicle Orthophoto Brightness with Terrestrial Laser Scanner Intensity
On 2025-02-03 by Jun Zhu, Kai Tan, Feijian Yin, Peng Song, Faming Huang @MDPI
Keywords: inversion, beach surface moisture, unmanned aerial vehicle, terrestrial laser scanner, data fusion
AI summary: Integrated method for monitoring beach surface moisture by combining UAV orthophoto brightness with TLS intensity, utilizing machine learning for accurate predictions, and field testing at Baicheng Beach in Xiamen, China.
Abstract: Beach surface moisture (BSM) is crucial to studying coastal aeolian sand transport processes. However, traditional measurement techniques fail to accurately monitor moisture distribution with high spatiotemporal resolution. Remote sensing technologies have garnered widespread attention for providing rapid and non-contact moisture measurements, but a single method has inherent limitations. Passive remote sensing is challenged by complex beach illumination and sediment grain size variability. Acti[...]
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