Article
Optics
Manoj Kumar, Vijayakumar Anand, Joseph Rosen
Summary: This study proposes an improved coded aperture correlation holography system with binary masks, which provides lower background noise and higher 3D imaging capability.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Jonas Strobelt, Daniel Stolz, Maximilian Leven, Matthew Van Soelen, Luke Kurlandski, Heba Abourahma, David J. McGee
Summary: A versatile system for fabricating surface microstructures is demonstrated by combining the photomechanical response of supramolecular azopolymers with structured polarized illumination. Surface relief structures with various periods and amplitudes can be fabricated with a single exposure, and different surface profiles can be generated by programming the spatial light modulator. The combination of multiple surface microstructures into macroscopic areas is also achieved, and the growth and observation of the structures can be done in real time without post-exposure processing.
Article
Optics
Francisco Jose Torcal-Milla, Luis Miguel Sanchez-Brea, Jose Antonio Gomez-Pedrero
Summary: A Sector-based Fresnel zone plate is composed of a mosaic of sectors with different focal distances, providing dual focus and extended depth-of-focus capabilities. Numerical simulations and experimental verifications show its potential applications in microscopy, lithography, data storage, and imaging.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Simcha K. Mirsky, Natan T. Shaked
Summary: Six-pack holography is used to reject out-of-focus objects in dynamic samples by illuminating the sample from six different angles and pixel-wise averaging the reconstructed images. This significantly reduces the contribution of out-of-focus objects by up to 83%, improving system sectioning capabilities.
Article
Optics
Jaroslaw Suszek, Michal Makowski, Andrzej Kolodziejczyk, Filip Wlodarczyk, Artur Sobczyk, Piotr Nurczyk, Przemyslaw Duda, Joanna Starobrat, Romuald Beck
Summary: High-end lens objectives in modern machine vision systems provide superior imaging on advanced sensor arrays, thanks to their highly corrected optical aberrations and large apertures. However, their shallow depth of focus is a disadvantage that researchers have been trying to overcome programmatically while compromising image resolution. This paper proposes a simple optical system equipped with novel add-on diffractive elements, enabling highly extended sharp imaging without any pre- or post-processing. The experimental results show improved readability of alphanumerical symbols in a wide range of defocus parameters, and a robust neural network-based image quality assessment method is also introduced.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Yourong Liu, Tong Shen, Biao Kang, Shaoxing Li, Zengrong Zheng, Huaqing Lv, Jihong Zheng
Summary: This paper investigates the effects of using a composite photopolymer system and a photoinitiator on the optical properties of a volume phase holographic grating. The study shows that the performance of the hologram can be improved under specific conditions, and demonstrates the high-density data recording capability of the photopolymer.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Jaromir Behal, Pasquale Memmolo, Lisa Miccio, Vittorio Bianco, Pietro Ferraro
Summary: Digital holography technology allows encoding complex information onto digital supports, with potential applications in automotive, video surveillance, and homeland security. Self-interference digital holography (SIDH) is investigated as a method for obtaining refocusable wavefronts using low-coherence light sources. A model is developed and analyzed to study the optical performance of SIDH, and a configuration for enhancing resolution is proposed. Experimental verification is conducted in the visible range, and a proof of concept SIDH imaging in the far infrared range is provided.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Neelam Barak, Vineeta Kumari, Gyanendra Sheoran
Summary: This paper proposes a module consisting of two electrically tunable lenses that enable continuous zoom and magnification within the extended depth of focus of microscope objective. The module provides a large working distance and eliminates interruption while switching objectives. The major benefit is that the image plane remains stationary throughout the zooming range.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Anthony Berdeu, Thomas Olivier, Fabien Momey, Loic Denis, Frederic Pinston, Nicolas Faure, Corinne Fournier
Summary: In-line digital holography is a powerful tool for imaging absorbing and phase objects, but the holograms can be corrupted by background signals. By using two holograms of the same object at different locations, an inverse problems approach can be applied to estimate the sample's complex transmittance and the contribution of background interference. Experimental results with stained bacteria demonstrate improved reconstructions of the sample while considering the background contribution.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Simcha K. Mirsky, Natan T. Shaked
Summary: In this paper, an improved holography system is presented for quantitative phase unwrapping of thick and extended transparent objects. By generating synthetic wavelength phase maps and using hierarchical phase unwrapping, noise can be reduced while maintaining improvements in phase ambiguity.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Yuhan Zheng, Mingfeng Xu, Mingbo Pu, Fei Zhang, Di Sang, Yinghui Guo, Xiong Li, Xiaoliang Ma, Xiangang Luo
Summary: This paper proposes an efficient method for designing extended depth-of-focus metalenses and improves the average focal depth and diffraction efficiency by topology-shape optimization. The results offer new insights into the design of metalenses and may find potential applications in imaging and holography.
Article
Optics
Angela Soria-Garcia, Luis Miguel Sanchez-Brea, Jesus del Hoyo, Francisco Jose Torcal-Milla, Jose Antonio Gomez-Pedrero
Summary: We generalized the angular diffractive lenses by defining the angular distribution of the focal length as a Fourier series. Using Particle Swarm Optimization algorithm, we optimized the Fourier coefficients of the lens to minimize the beam width and increase its uniformity for a given depth of focus. The experimental verification using a Spatial Light Modulator showed that the Fourier series diffractive lens has a more uniform and narrower beam than previous angular lenses.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Jieming Zhao, Zhan Gao, Shengjia Wang, Yuhao Niu, Lin Deng, Ye Sa
Summary: In this paper, an inverse cross-correlation-based algorithm is proposed for the digital holographic imaging of multiplanar objects with a large depth of field. By calculating the image inverse cross-correlation matrix, a planar output mapping closely around the objects is established, and the depth of field of digital holography is improved by combining the search for edge planes with the depth estimation operator.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Keiichiro Toda, Miu Tamamitsu, Takuro Ideguchi
Summary: The text discusses a supersensitive QPI technique that expands the dynamic range through a combination of wavefront shaping and dark-field QPI techniques. Experimental results show that this technique can improve the sensitivity of QPI and is useful for mid-infrared photothermal QPI.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
Dan Yu, Qi Liu, Yuhang He, Hongpeng Liu, Suhua Luo
Summary: This study investigates the bending deformation characterization of a holographic sensor based on an acrylamide polymer with a flexible substrate. The research analyzes unilateral and bilateral bending deformations, presenting experimental results and demonstrating the linear dependence of peak wavelength shifts on bending angles and lateral displacements. The sensing application shows high position sensitivity and angle sensitivity, providing a basis for practical utilization.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Volodymyr Tkachenko, Reinhard Schwodiauer, Romina Rega, Simona Itri, Martina Mugnano, Danila del Giudice, Heidi Ottevaere, Yunfeng Nie, Pietro Ferraro, Simonetta Grilli
Summary: The study focuses on a pyroelectrohydrodynamic jet system that efficiently accumulates tiny aqueous droplets on a target slide, significantly reducing the required sample volume for successive biochemical reactions. The system can potentially increase analyte concentration by 70-fold in the overlap region, with the possibility of further increase by extending droplet accumulation time.
ADVANCED ENGINEERING MATERIALS
(2022)
Editorial Material
Optics
Partha P. Banerjee, Elena Stoykova, Daping Chu, Jae-Hyeung Park, Pietro Ferraro, John Sheridan
Summary: This feature issue continues the tradition of tracking the latest research topics discussed in the OSA Topical Meeting on Digital Holography and 3D Imaging, aligning with the subjects of Applied Optics and the Journal of the Optical Society of America A.
Article
Optics
Daniele Gaetano Sirico, Elena Cavalletti, Lisa Miccio, Vittorio Bianco, Pasquale Memmolo, Angela Sardo, Pietro Ferraro
Summary: A study using digital holographic microscopy has been conducted to investigate the locomotion of Tetraselmis microalgae in a 3D environment. The study reveals a fast and semiautomatic criterion for tracking and analyzing the swimming path of the microalgae. By combining digital holography with numerical algorithms, the study is able to measure the tri-dimensional paths and kinematic parameters of the microorganisms, as well as accurately capture their morphology. This research introduces a promising trend of using digital holography and motility microorganism analysis as a label-free and non-invasive environmental monitoring tool.
Article
Biochemical Research Methods
Xixi Chen, Heng Li, Tianli Wu, Zhiyong Gong, Jinghui Guo, Yuchao Li, Baojun Li, Pietro Ferraro, Yao Zhang
Summary: We demonstrate that red blood cells can act as bio-microlenses for trapping and imaging subwavelength objects by controlling their shape with optical forces. The focal length of the microlenses can be adjusted by varying the laser power injected into a fiber probe, allowing efficient trapping and imaging. These bio-microlenses offer new opportunities in the development of biocompatible light-driven devices for blood disease diagnosis.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Vittorio Bianco, Mattia Delli Priscoli, Daniele Pirone, Gennaro Zanfardino, Pasquale Memmolo, Francesco Bardozzo, Lisa Miccio, Gioele Ciaparrone, Pietro Ferraro, Roberto Tagliaferri
Summary: Researchers use a generative adversarial network to reconstruct Fourier ptychographic images in real-time, even with severely misaligned setups. The network accurately retrieves important morphometric information relevant for neural tissue diagnosis, speeding up quantitative phase-contrast analysis of tissue samples.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Polymer Science
Veronica Vespini, Sara Coppola, Pietro Ferraro
Summary: Researchers have demonstrated a strategy that combines the formation of polymer thin films and self-propulsion in floating objects. By delivering polymer droplets with the right solvent concentration onto floating objects, instant polymer thin films can be formed at the water surface, providing this unique functionality.
Article
Biochemical Research Methods
Jaromir Behal, Daniele Pirone, Daniele Sirico, Vittorio Bianco, Martina Mugnano, Danila del Giudice, Beatrice Cavina, Ivana Kurelac, Pasquale Memmolo, Lisa Miccio, Pietro Ferraro
Summary: Live cells can be used as optical components in bio-hybrid systems, and various cell types have been studied for this purpose. However, the optical properties of White Blood Cells (WBCs) have not been investigated yet. In this study, we accurately analyze two classes of WBCs (monocytes and lymphocytes) using a digital holographic microscope and a microfluidic system, and quantify the phase maps to enhance differentiation among different sizes of WBCs.
Review
Optics
Marika Valentino, Daniele Gaetano Sirico, Pasquale Memmolo, Lisa Miccio, Vittorio Bianco, Pietro Ferraro
Summary: Microplastic pollution poses a serious threat to the global environment, prompting the development of new identification and characterization methods. Digital holography (DH) has emerged as a high-throughput tool for detecting microplastics in flowing systems. This review discusses advances in microplastic screening using DH, examining the hardware and software aspects. The role of artificial intelligence in classification and regression tasks for automatic analysis based on smart DH processing is highlighted. Furthermore, the continuous development and availability of field-portable holographic flow cytometers for water monitoring are also discussed.
Article
Chemistry, Analytical
Daniele Pirone, Lu Xin, Vittorio Bianco, Lisa Miccio, Wen Xiao, Leiping Che, Xiaoping Li, Pasquale Memmolo, Feng Pan, Pietro Ferraro
Summary: Digital holography enables access to the full 3D information of flowing cells, leading to improved cell identification and potential in recognizing drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Physiology
Marika Valentino, Vittorio Bianco, Lisa Miccio, Pasquale Memmolo, Valentina Brancato, Paolo Libretti, Marcello Gambacorta, Marco Salvatore, Pietro Ferraro
Summary: Kidney microscopy is essential for studying the morphology, physiology, and pathology of kidney tissues, providing important results for diagnosis. Fourier Ptychography (FP) is a microscopy technique that offers high-resolution images and a wide field of view, making it an attractive option for histopathology. This study presents the first comprehensive collection of kidney tissue images captured by an FP microscope, demonstrating the potential of FP microscopy in clinical practice for kidney histopathology.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Optics
Daniele Pirone, Daniele Sirico, Lisa Miccio, Vittorio Bianco, Martina Mugnano, Danila del Giudice, Gianandrea Pasquinelli, Sabrina Valente, Silvia Lemma, Luisa Iommarini, Ivana Kurelac, Pasquale Memmolo, Pietro Ferraro
Summary: The latest discoveries in the biochemical field emphasize the increasing importance of lipid droplets (LDs) in cellular regulatory mechanisms. Traditional methods like fluorescence microscopy and transmission electron microscopy only provide 2D images and partial measurements, limiting analysis of large cell numbers. We demonstrate for the first time the capability of 3D visualization and full LD characterization using a tomographic phase-contrast flow-cytometer, providing more in-depth understanding and new discoveries on the correlation between LDs and cellular functions.
OPTO-ELECTRONIC ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Volodymyr Tkachenko, Sara Coppola, Veronica Vespini, Daniele Tammaro, Pier Luca Maffettone, Pietro Ferraro, Simonetta Grilli
Summary: Studied the dynamics of oscillation and jetting of high viscosity liquid dielectrics in an electric field, and explored the viscosity dependence of the fluid. This study helps in the appropriate design of EHD processes and offers possibilities for rheological characterization of liquid polymers at nanoliter scale.
Article
Optics
Jaromir Behal, Pasquale Memmolo, Lisa Miccio, Vittorio Bianco, Pietro Ferraro
Summary: Digital holography technology allows encoding complex information onto digital supports, with potential applications in automotive, video surveillance, and homeland security. Self-interference digital holography (SIDH) is investigated as a method for obtaining refocusable wavefronts using low-coherence light sources. A model is developed and analyzed to study the optical performance of SIDH, and a configuration for enhancing resolution is proposed. Experimental verification is conducted in the visible range, and a proof of concept SIDH imaging in the far infrared range is provided.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Automation & Control Systems
Anat Cohen, Matan Dudaie, Itay Barnea, Francesca Borrelli, Jaromir Behal, Lisa Miccio, Pasquale Memmolo, Vittorio Bianco, Pietro Ferraro, Natan T. Shaked
Summary: A new label-free imaging flow cytometry method is proposed for noninvasive and automated biological cell classification. By acquiring off-axis holograms of each cell from multiple viewpoints and using a modified ResNet-18 deep convolutional neural network, highly discriminating features are extracted for cell detection, classification, and differentiation. The method shows improved accuracy in classifying different types of cells and reduces the number of cell examples needed for training.
ADVANCED INTELLIGENT SYSTEMS
(2023)
Article
Optics
Zhengzhong Huang, Pasquale Memmolo, Pietro Ferraro, Liangcai Cao
Summary: Accurate depiction of wave interactions with physical objects is important. This study presents a reliable method for combining two in-line holograms and one off-axis hologram to achieve fast-convergence holographic calculation. The method enables high-resolution and full-field reconstruction, enhancing applications in wavefront sensing and biological tissue analysis.