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In this paper, we construct a laser 3D imaging simulation model based on the 3D imaging principle of electro-optical crystal modulation. Unlike the traditional 3D imaging simulation method, this paper focuses on the laser scattering characteristics of the target scene. To accurately analyze and simulate the scattering characteristic model of the target under laser irradiation, we propose a BRDF (Bidirectional Reflectance Distribution Function) model fitting algorithm based on the hybrid BBO-Firefly model, which can accurately simulate the laser scattering distribution of the target at different angles. Finally, according to the fitted scattering characteristic model, we inverted the target imaging gray map. We used the laser 3D imaging restoration principle to reconstruct the 3D point cloud of the target to realize the laser 3D imaging of the target.
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http://dx.doi.org/10.3390/mi15111327 | DOI Listing |
Phys Rev Lett
August 2025
CNR-INO, Largo Enrico Fermi 6, I-50125 Firenze, Italy.
We experimentally investigate a system composed of two levitating nanospheres whose motions are indirectly coupled via coherent scattering in a single optical cavity mode. The nanospheres are loaded into a double longitudinal tweezer created with two lasers at different wavelengths, where chromatic aberration leads to the formation of two separate trapping sites. We achieve strong coupling between each pair of modes in the transverse plane of the tweezer, and we show the emergence of dark modes in the overall coupled motion.
View Article and Find Full Text PDFSmall
September 2025
Jožef Stefan Institute, Jamova cesta 39, Ljubljana, SI-1000, Slovenia.
The demand for rapid, field-deployable detection of hazardous substances has intensified the search for plasmonic sensors with both high sensitivity and fabrication simplicity. Conventional approaches to plasmonic substrates, however, often rely on lithographic precision or complex chemistries limiting scalability and reproducibility. Here, a facile, one-step synthesis of vertically aligned 2D nanosheets composed of intergrown CuO/CuO crystallites is presented, fabricated via oxygen plasma discharge on copper substrates.
View Article and Find Full Text PDFJ Chem Phys
September 2025
Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India.
We introduce a novel method using a kilohertz (kHz) amplified 800 nm laser for the first experimental confinement of microparticles within a single beam. This study demonstrates that high-energy kHz pulses can confine 1-μm-radius polystyrene beads in water within ∼26 μm. This approach utilizes the unique properties of high-energy pulsed lasers, distinct from continuous-wave and megahertz pulsed lasers traditionally used in optical trapping.
View Article and Find Full Text PDFJ Chem Phys
September 2025
Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China.
This study investigates the stereodynamical control of the H + HBr (v = 0, j = 1) reaction within 0.01-1.50 eV collision energy using the time-dependent wave packet method.
View Article and Find Full Text PDFExp Eye Res
September 2025
Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics_Huazhong University of Science and Technology, Wuhan 430074, China; MOE Key Laboratory for Biomedical Photonics, Department of Biomedical Engineering, College of Life Science and Technology, Advanced Biomed
Femtosecond laser has become an important tool in cataract surgery due to its precision and minimally invasive nature. However, the strong scattering properties of the lens limit surgical efficiency, especially when it comes to effectively cutting highly opaque and hard cataracts with femtosecond laser. This study proposes a method for achieving optical transparency in opaque lenses through tartrazine treatment.
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