Article
Engineering, Electrical & Electronic
Naitao Xu, Weiguo Liu, Jin Cheng, Menghua Wang, Bei Fang, Xin Li, Yingshun Xu
Summary: Authors in this article present a prototype of a dichroic scanning nonlinear optical microscope with a photodetecting polymer scanner and a customized objective lens. They have manufactured two types of two-axis electromagnetic actuated polymer scanners through a standard PCB fabrication process. By placing such a polymer scanner on the external back focal plane of a customized water immersion objective lens, they have replaced the scan lens and tube lens in a conventional nonlinear optical microscope.
IEEE PHOTONICS JOURNAL
(2021)
Article
Optics
Shanting Hu, Xiaodong Gu, Ahmed Hassan, Ruixiao Li, Masanori Nakahama, Satoshi Shinada, Fumio Koyama
Summary: This paper demonstrates the lateral monolithic integration of a tunable first-order surface-grating loaded vertical-cavity surface-emitting laser (VCSEL) and slow-light waveguide with fan-beam steering and amplifier function. A shallow Bragg-grating formed on the surface of a VCSEL section enables the selection of a single slow-light mode, which can be coupled into the integrated long waveguide and amplified through pumping the amplifier above threshold. The device achieves high amplified slow-light power and quasi-single-mode power, as well as solid-state beam steering.
Article
Optics
Hitesh G. B. Gowda, Ulrike Wallrabe, Matthias C. Wapler
Summary: We introduce a compact adaptive glass membrane lens that can correct higher order wavefront aberrations and perform axial scanning using integrated segmented piezoelectric actuators. The membrane can deform with rotational symmetry to provide focus control up to +/- 6 m(-1) and correct spherical aberration up to 5 wavelengths. It can also correct higher order aberrations such as astigmatism, coma, and trefoil with different discrete symmetries by up to 10 wavelengths. Our design features a large clear aperture of 12 mm, a thickness of 2 mm, and a response time of less than 2 ms on an 18 mm actuator diameter.
Article
Automation & Control Systems
Wenzhe Li, Xiaodong Jia, Yuan-Ming Hsu, Chen-Hung Liao, Yunfei Wang, Mong-Tung Lin, Jay Lee
Summary: This study proposes an improved method for lens matching by introducing genetic algorithms and a DNN surrogate model, which can significantly improve production yield and efficiency.
IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING
(2023)
Article
Biochemical Research Methods
Jiawei Sun, Nektarios Koukourakis, Jochen Guck, Jurgen W. Czarske
Summary: Optical trapping is crucial in biology for precise manipulation of nanoparticles, micro-robots, and cells. The use of fiber-based dual-beam traps is common for optical manipulation of large cells due to their low risk of photodamage and high stiffness. A novel dual-beam optical trap using a multi-core fiber (MCF) transformed into a phased array enables real-time controlled rotation of cells about all 3D axes, providing high flexibility and resolution for applications like contactless cell surgery and refractive index tomography.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Chengbin Qian, Peng Huang, LiMin Zhu, Zhiwei Zhu
Summary: This paper introduces a facile and high-throughput method for controllable fabrication of polymeric miniature lens arrays. By filling the miniature holes in a template, curved lenslets can be formed through the balance between gravity and surface tension. Experimental results confirm the effectiveness of the method in controlling shape and curvature, and further examination demonstrates the optical features of the lens arrays.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Optics
Anita Devi, Arijit K. De
Summary: There is increasing research interest in using ultrashort pulsed excitation for optical trapping and manipulation of objects. While nonlinear laser tweezers show great promise, challenges such as accurate pulse-width measurement, force calibration, and high cost limit their practical use.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Hussein Mohammed Hassan, Tawfik Abd-Elhamed Eldessouky, Mohammed Medhat
Summary: A new compact optical passive athermalized objective lens with focal length 120 mm and F-number 1.1 is designed. It has a wide field of view and high resolution, making it suitable to work with a focal plane array detector with 17-mu m pixel pitch. The aberrations are well corrected and it performs stably over a wide temperature range.
JOURNAL OF OPTICS-INDIA
(2023)
Article
Optics
Uzair Aalam, Khushboo Singh, Aparajita Bandyopadhyay, Amartya Sengupta
Summary: This research proposes an optical system for terahertz reflectivity measurement based on refractive optical elements, which utilizes the non-destructive behavior of terahertz radiation in industrial and research applications. The THz scanner head unit is manufactured using additive manufacturing technology and is modular, compact, lightweight, and easy to handle, enabling outdoor measurements. Furthermore, the applicability of this THz scanner head is demonstrated in various applications such as hydration sensing, surface roughness characterization, and interface detection in multilayered structures, which are crucial for non-contact quality control and assessment of consumer products in industrial settings.
OPTICAL ENGINEERING
(2023)
Article
Chemistry, Analytical
Yen-Lung Chen, Huihua Kenny Chiang
Summary: Handheld ultrasound has the potential to improve healthcare in resource-limited areas. This study developed a dual-element ultrasound transducer combined with an optical position tracker, which improved signal contrast and reduced noise. The custom-made device enables continuous scanning without limitations and could popularize medical care in remote villages.
Article
Optics
Jiwoon Yeom, Jinsoo Jeong, Jisoo Hong, Kwang-Soon Choi
Summary: In this study, we analyze the image quality of a holographic lens and propose a method for implementing compact near-eye displays using non-converging signal waves. By introducing a comprehensive analysis model and validating it through simulations and experiments, we achieve satisfactory results.
Article
Materials Science, Multidisciplinary
Yingzhi Wang, Weishan Chen, Jie Deng, Jing Li, Yingxiang Liu
Summary: This study proposes an integrated strategy that combines light filtering and optical focusing functions using a tunable filtering-focusing mechanism driven by a piezoelectric tube actuator. The prototypes developed demonstrate the advantages of lightweight and miniaturization. Experimental results validate the effectiveness of the mechanism, including the acquisition of multispectral images within 0.1 s and obtaining sharp images at a linear speed of 60.2 mm/s. The study contributes to reducing the volume of MSC systems while maintaining simplicity, providing a practical and effective solution for integrated design.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Optics
Dongmok Kim, Sehui Chang, Hyuk-Sang Kwon
Summary: The article discusses a low f-number endoscopic lens design that provides wide field-of-view and high-resolution imaging, which could help develop a high-performance disposable endoscope with the advantages of mass manufacturing and low cost.
Article
Optics
Jeroen Missinne, Viktor Geudens, Steven Van Put, Giannis Poulopoulos, Michal Szaj, Charalampos Zervos, Hercules Avramopoulos, Geert Van Steenberge
Summary: We demonstrate a ball-lens based optical interface for coupling between a single mode fiber and a silicon grating coupler from the back side of a photonic integrated circuit (PIC). The peak coupling efficiency was found to be only between 1.4 dB and 2.2 dB lower when interfacing with a ball lens from the back side compared to coupling from the top side using a cleaved fiber. The potential of the ball lens interface was proven by realizing a compact optical temperature sensor probe based on a phased shifted silicon photonic Bragg grating structure on a PIC.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Yamato Misugi, Hideaki Okayama, Tomohiro Kita
Summary: In this study, a passive beam scanner was proposed to achieve two-dimensional beam scanning through wavelength sweep of a laser light. A 64-channel passive optical phased array and a hybrid wavelength-tunable laser diode were integrated into a combined chip, with a device size of 5mm x 1.5mm and power consumption of 49.3 mW. Compared with previous devices, it was nine times smaller in size and had a total power consumption of only tens of milliwatts. This device has lower power consumption and achieves fully integrated light detection and ranging.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Biochemical Research Methods
Aisada Uchugonova, Hans Georg Breunig, Ana Batista, Karsten Koenig
JOURNAL OF BIOPHOTONICS
(2016)
Article
Dermatology
S. Springer, M. Zieger, K. Koenig, M. Kaatz, J. Lademann, M. E. Darvin
SKIN RESEARCH AND TECHNOLOGY
(2016)
Article
Dermatology
Marisa Klemp, Martina C. Meinke, Martin Weinigel, Hans-Joachim Roewert-Huber, Karsten Koenig, Martina Ulrich, Juergen Lademann, Maxim E. Darvin
EXPERIMENTAL DERMATOLOGY
(2016)
Article
Biochemical Research Methods
Ana Batista, Hans Georg Breunig, Aisada Uchugonova, Antonio Miguel Morgado, Karsten Koenig
JOURNAL OF BIOMEDICAL OPTICS
(2016)
Article
Dermatology
Mihaela Balu, Griffin Lentsch, Dorota Z. Korta, Karsten Koenig, Kristen M. Kelly, Bruce J. Tromberg, Christopher B. Zachary
LASERS IN SURGERY AND MEDICINE
(2017)
Article
Dermatology
Jessica Lin, Inga Saknite, Manuel Valdebran, Mihaela Balu, Griffin Lentsch, Joshua N. Williams, Karsten Koenig, Bruce J. Tromberg, Natasha Atanaskova Mesinkovska
LASERS IN SURGERY AND MEDICINE
(2019)
Article
Oncology
Griffin Lentsch, Mihaela Balu, Joshua Williams, Sanghoon Lee, Ronald M. Harris, Karsten Koenig, Anand Ganesan, Bruce J. Tromberg, Nirmala Nair, Uma Santhanam, Manoj Misra
PIGMENT CELL & MELANOMA RESEARCH
(2019)
Article
Biochemical Research Methods
Karsten Konig, Hans Georg Breunig, Ana Batista, Andreas Schindele, Michael Zieger, Martin Kaatz
JOURNAL OF BIOMEDICAL OPTICS
(2020)
Article
Multidisciplinary Sciences
Pedro Guimaraes, Ana Batista, Michael Zieger, Martin Kaatz, Karsten Koenig
SCIENTIFIC REPORTS
(2020)
Review
Chemistry, Analytical
Karsten Koenig
METHODS AND APPLICATIONS IN FLUORESCENCE
(2020)
Article
Oncology
Griffin Lentsch, Manuel Valdebran, Inga Saknite, Janellen Smith, Kenneth G. Linden, Karsten Koenig, Ronald J. Barr, Ronald M. Harris, Bruce J. Tromberg, Anand K. Ganesan, Christopher B. Zachary, Kristen M. Kelly, Mihaela Balu
PIGMENT CELL & MELANOMA RESEARCH
(2020)
Article
Multidisciplinary Sciences
Philipp Prinke, Jens Haueisen, Sascha Klee, Muhammad Qurhanul Rizqie, Eko Supriyanto, Karsten Koenig, Hans Georg Breunig, Lukasz Piatek
Summary: The proposed automatic segmentation algorithm effectively separates human skin cells components from tissue in fluorescence data, utilizing a multi-stage merging process and a cell model with novel features. This approach ensures high robustness in the segmentation process and accurately classifies cells based on depth-dependent data characteristics. The algorithm contributes to fully automated classification of human skin cells in multiphoton data and lays the foundation for non-invasive skin cancer detection.
SCIENTIFIC REPORTS
(2021)
Review
Optics
Karsten Koenig
Summary: Medical femtosecond laser devices are used in dermatology for non-invasive imaging and in ophthalmology for corneal surgery. They have the potential to reduce skin biopsies, optimize personalized medicine, and decrease animal studies in pharmacy. However, the high price of these devices is a major disadvantage compared to standard medical equipment.
JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS
(2023)
Article
Ophthalmology
Theo G. Seiler, Ana Batista, Beatrice E. Frueh, Karsten Koenig
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2019)
Article
Entomology
Klaus Reinhardt, Hans Georg Breunig, Karsten Koenig
ARTHROPOD STRUCTURE & DEVELOPMENT
(2017)