Article
Engineering, Electrical & Electronic
Pavitra Sokke Rudraiah, Sukanta Nandi, Hamootal Duadi, Dror Fixler
Summary: This study develops a non-invasive technique to assess the location of tattoo ink in deep tissue layers. The crossover point-based diffuse reflectance technique effectively detects the ink location and shows good quantitative agreement with the injected ink depth.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Biochemical Research Methods
Tadej Tomanic, Luka Rogelj, Matija Milanic
Summary: Analysing diffuse reflectance spectra to extract properties of biological tissue requires modelling of light transport within the tissue. This study evaluates the impact of fixing different model parameters on the accuracy and robustness of a GPU-accelerated algorithm and proposes a method to improve the fitting performance by pre-estimating model parameters.
BIOMEDICAL OPTICS EXPRESS
(2022)
Correction
Engineering, Electrical & Electronic
Xuebing Zhang, Zizheng Cao, Juhao Li, Dawei Ge, Zhangyuan Chen, Ivo M. Vellekoop, Antonius M. J. Koonen
Summary: Professor Nabeel A. Riza's laboratory theoretically proposed an NLOS indoor optical wireless communications arrangement with diffuse reflections from diffuse optical elements. Our proposed CAO-Tx can focus reflections onto the receiver rather than scatter them in all directions, which would greatly benefit this type of arrangement. We apologize for omitting this prior art.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Geochemistry & Geophysics
Giuseppe Zibordi, Jean-Francois Berthon, Marco Talone, Juan I. Gossn, David Dessailly, Ewa Kwiatkowska
Summary: The accuracy of marine data products derived from the Ocean and Land Color Instrument (OLCI-A) on the Copernicus Sentinel 3A satellite was assessed using in situ reference measurements from various European Seas. The evaluation showed that satellite-derived absorption, diffuse attenuation, and backscattering coefficients had substantial accuracy, while underestimates were observed for the absorption coefficients of non-water constituents and colored dissolved organic matter.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2023)
Article
Dermatology
Ehsan Allahdadi, Afshan Shirkavand, Ezeddin Mohajerani, Parvin Mansouri, Ali Almasi, Somayeh Jahani Sherafat
Summary: The research utilized UV-visible diffused reflection spectra to determine optimal laser parameters for hemangioma treatment based on absorption peak differences, providing guidance for efficient treatment.
JOURNAL OF COSMETIC DERMATOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Takahiro Kono, Yusaku Konno, Hidekazu Kanayama, Kohei Shimamura, Uma Maheswari Rajagopalan, Chihiro Asano, Tadahito Takahashi, Akihito Shundo, Jun Yamada
Summary: This study investigates the influence of scattering properties of medium on the appearance of cosmetic products using dispersions of fine particles. The results indicate that decreasing the scattering coefficient increases translucency, while only the group with the highest scattering coefficient shows a slightly reduced glossiness.
APPLIED SCIENCES-BASEL
(2022)
Article
Nanoscience & Nanotechnology
Ayanna Shorter, Md Golam Rabbani Chowdhury, Sangeeta Rout, Mikhail A. A. Noginov
Summary: We studied the reflection spectra of dye-doped and undoped polymers on Ag and Au substrates and found anomalous dips in the UV range. The dips observed on Ag substrates were close to singularities in the refractive indexes of SPPs at the Ag-polymer interface. The dips observed on Au substrates were more pronounced, broader, and shifted to shorter wavelengths, and their spectral positions had large standard deviations compared to those on Ag substrates.
Article
Chemistry, Physical
S. M. Lambrick, M. Bergin, D. J. Ward, M. Barr, A. Fahy, T. Myles, A. Radic, P. C. Dastoor, J. Ellis, A. P. Jardine
Summary: In this study, results obtained from a scanning helium microscope (SHeM) under typical operating conditions are presented, showing the observation of diffuse scattering with an approximately cosine-like distribution centered about the surface normal. This distribution is markedly different from those observed from well-prepared surfaces typically studied in helium atom scattering experiments. Knowledge of the typical scattering distribution in SHeM experiments serves as a basis for interpreting topographic contrast in images and comparing against more exotic contrast mechanisms.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Geochemistry & Geophysics
Chuangjian Li, Jingtao Zhao, Suping Peng, Peng Lin
Summary: Diffractions are reliable carriers of high-resolution structural information and can be enhanced using the Kirchhoff demigration method with a dip-based weight function. By designing a dip-based filter, reflection waves can be suppressed during demigration, allowing for the extraction of diffraction-only waves even in cases of amplitude sharp changes. This method has shown potential in separating diffractions and highlighting geological discontinuities, as demonstrated in overthrust and field data applications.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2021)
Article
Multidisciplinary Sciences
T. F. Yang, R. G. Zeng, L. H. Yang, A. Sulyok, M. Menyhard, K. Tokesi, Z. J. Ding
Summary: This article presents a combined experimental and theoretical work to obtain the energy loss function (ELF) or the excitation spectrum of samarium in the energy loss range between 3 and 200 eV. It distinguishes the surface and bulk contributions and accurately determines the frequency-dependent energy loss function and optical constants (n and k) of samarium using the reverse Monte Carlo method. The results show that there are a bulk mode at 14.2 eV with a peak width of about 6 eV and a corresponding broaden surface plasmon mode at energies of 5-11 eV.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Electrical & Electronic
Ana Diaz-Rubio, Sergei A. Tretyakov
Summary: In the face of challenging requirements for future mobile communication systems, researchers are exploring the potential of creating intelligent radio environments using reconfigurable and smart metasurfaces. These metasurfaces can redirect incident waves in desired directions and their behavior when illuminated from other directions as well as how scattering from finite-sized anomalous reflectors can be estimated is crucial. Models have been developed to explain the behavior of phase-gradient metasurfaces and anomalous reflections, providing a foundation for integrating these elements into propagation channel ray-tracing models.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Aerospace
Yuhuan Qiu, Guohua Kang, Xunlong Cheng, Jiaqi Wu
Summary: To address the problem of black coating falling off easily, this study constructs a light-absorbing spacecraft surface based on a micro/nanostructure by imitating a natural light-trapping structure. Through analysis and simulation, it is shown that the designed complex stealth structure can significantly reduce the overall brightness of the spacecraft by absorbing 80.18% of visible light.
Article
Chemistry, Analytical
Aris Ikiades, Ioannis D. Bassukas, Nikolaos Kourkoumelis
Summary: This article discusses the use of a fiber optic array sensor to monitor the freezing depth during cryotherapy. The sensor measures the backscattered and transmitted light from frozen and unfrozen tissues and uses the variations in optical diffusion properties to determine the extent of freezing. Both ex vivo and in vivo measurements yielded comparable results, despite spectral variations caused by the hemoglobin absorption peak. The sensor has the potential to be utilized for real-time monitoring of cryosurgery.
Article
Computer Science, Artificial Intelligence
Jing Wang, Carla Kuesten, Jim Mayne, Gopa Majmudar, Thrasyvoulos N. Pappas
Summary: This study proposes objective image-based techniques for quantitative evaluation of facial skin gloss, revealing the impact of different statistics of surface and subsurface reflections on skin gloss perception. The analysis shows that the contrast of the surface reflection has a strong positive influence on skin gloss perception, while the darkness of the subsurface reflection has a weaker positive effect on perceived gloss.
IEEE TRANSACTIONS ON IMAGE PROCESSING
(2021)
Article
Computer Science, Software Engineering
Aditya Sole, Giuseppe Claudio Guarnera, Ivar Farup, Peter Nussbaum
Summary: This paper characterizes the bidirectional reflectance of two homogeneous print samples with complex optical properties, demonstrating that in-plane retro-reflective measurements combined with genetic algorithm-based BRDF fitting can estimate an optimal set of parameters for reflectance models. Minimal measurements enable visually satisfactory renderings, while a few additional photographs lead to more accurate results, particularly for samples with goniochromatic appearance.
