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
Chemistry, Analytical
Seul-Bit-Na Koo, Yu-Seop Kim, Chan-Young Park, Deuk-Ju Lee
Summary: The polymerase chain reaction is an important technique in biological research, but it is time consuming and costly. In this study, a Compact Camera Fluorescence Detector was proposed for use in real-time PCR devices, which can reduce cost, miniaturize the size, and ensure stable fluorescence detection.
Article
Chemistry, Analytical
Yunfeng Li, Zongxuan Li, Tiancong Wang, Shuping Tao, Defu Zhang, Shuhui Ren, Bin Ma, Changhao Zhang
Summary: As space resources become increasingly constrained, major space-faring nations are establishing large space target monitoring systems. This paper investigates an ultra-lightweight and ultra-compact space camera's optic-mechanical system and optical alignment method, using optimization design and a dual CGH coreference alignment method to address mounting problems. Test results show the feasibility of the method, with the system wavefront difference better than 1/10 lambda and the imaging and magnitude tests meeting design requirements. The proposed design and alignment methods are instructive for large field of view full freeform optical loads.
Article
Optics
Jingchen Li, Kun Zhang, Jialin Du, Qingrong Chen, Xi Zhang, Si Sun, Jie Zhong, Fan Yang, Wei Yan
Summary: The focus tunable lens (FTL) has brought a new direction for the development of zoom optical systems, offering advantages in response speed and mechanical vibration control. However, there is a lack of design methods and computational theories for this type of system. This paper proposes a method to convert conventional mechanical zoom systems into FTL zoom systems, using the equivalent group element substitution theory and a computational screening algorithm. An example demonstration shows the successful design of an FTL zoom optical system with desired specifications.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Haitao Li, Yujie Chen, Yan Wang, Hang Zhou, Hongbin Yu
Summary: A novel compact focus tunable liquid-filled lens using electromagnetic actuation method is presented. It incorporates a specially designed elastic membrane with an annular ridge structure and non-uniform thickness contour for actuator integration and improving optical quality. The lens has bidirectional, wide-range focus tuning capability due to the adoption of a custom-designed moving coil type electromagnetic actuator and a refractive index matching strategy. The lens is fabricated using a combination of injection molding and 3D printing, and it shows symmetric focal length tuning and reduced spherical aberration in experiments.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
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
Optics
Jingchen Li, Kun Zhang, Jialin Du, Fanxing Li, Fan Yang, Wei Yan
Summary: The design method of an optical system with both telecentric and zoom functions is presented in this study, using Gaussian brackets and lens modules. Initial parameter solution of the telecentric zoom system is achieved by improving the Gaussian brackets and finding potential initial structural parameters using a selection method. Lens module method is then used to design the initial structure, including focus tunable lenses (FTL), and the combination method of the lens modules is expanded. An example of a 4X image-side telecentric zoom FTL system is constructed and optimized using CODEV, resulting in a well-performing system in telecentricity control, distortion control, and aberration correction, with an F/# of 4, a zoom range of 20 mm to 80 mm, an image plane size of 8 mm, and a total length of 218 mm.
OPTICS AND LASERS IN ENGINEERING
(2023)
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
Chemistry, Analytical
Jiawen Weng, Weishuai Zhou, Simin Ma, Pan Qi, Jingang Zhong
Summary: This paper proposes a model-free lens distortion correction method based on the phase analysis of fringe-patterns. By analyzing the phase demodulation of fringe-patterns, the distortion displacement map for the entire distorted image can be determined, leading to image correction. The method also automatically measures the distortion center by character analysis, and numerical simulations and experiments with a wide-angle lens validate its effectiveness.
Article
Computer Science, Information Systems
Jyun-Cheng Huang, Chien-Sheng Liu, Chung-Yu Tsai
Summary: Zoom lenses allow changes in camera magnification and distance to the object plane, complicating calibration. A five-step calibration procedure for a multifocus zoom lens in a 3D scanning system was proposed and validated for high reconstruction accuracy.
Article
Thermodynamics
Hai Wang, Mengjie Song, Haoteng Li, Jiayu Xiao, Jin Huang
Summary: This study demonstrates the design and optical performance analysis of a fixed linear-focus Fresnel lens solar system (FLFS) with three different tracking methods to reduce end loss. The simulation results indicate that the FLFS coupling curved slip rail has significant advantages and can improve optical efficiency at almost all sunlight incident angles.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Xiaohua Feng, Yayao Ma, Liang Gao
Summary: This paper presents a compact light field photography technique that uses simple optics and a small number of sensors to capture large-scale light fields. It enables high-speed and accurate 3D imaging and can handle severe occlusions.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Shilong Yao, Ruijie Tang, Long Bai, Hong Yan, Hongliang Ren, Li Liu
Summary: In this article, a compact and affordable micro force sensing system enhanced by deep neural network is proposed. A three-axis force sensor is designed and fabricated with a footprint of only 14 mm and is employed to transform the force on the material structure into more accurate distance information. The RNN-LSTM network is exploited to augment the micro force sensing capability of the robot's distal end-effector, achieving over 90% accuracy in force curve fitting for specific interventional tasks.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
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
Energy & Fuels
Haoteng Li, Jin Huang, Hai Wang, Mengjie Song
Summary: Through analyzing the receiver parameters of the FLFS system, this study discusses an effective method to address the issue of optical end loss in linear solar concentrators. The results demonstrate that adjusting the receiver position and solar declination angle can improve the optical efficiency of the system.
Article
Chemistry, Analytical
Hojong Choi, Se-woon Choe, Jae-Myung Ryu
Article
Mathematics
Kang Min Kim, Sun-Ho Choe, Jae-Myung Ryu, Hojong Choi
Article
Chemistry, Multidisciplinary
Hojong Choi, Se-woon Choe, Jaemyung Ryu
Summary: This study introduces a new collimator system that changes the virtual image of the resolution chart from infinity to a short distance to meet the near-field performance requirements of mobile phone camera optics. An equivalent-lens conversion method was designed to address chromatic aberration and field curvature issues caused by moving the focusing lens.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Seonkoo Chee, Jaemyung Ryu, Hojong Choi
Summary: The text describes a new floating collimator optical system for testing the resolution of mobile phone cameras, which can inspect the camera's resolution from infinity to a close range.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Analytical
Unsang Jung, Jin Hyuck Choi, Han Tae Choo, Gyu Ug Kim, Jaemyung Ryu, Hojong Choi
Summary: We developed a customized doubly Q-switched laser and a modularized sample stage for a fully customized photoacoustic (PA) system. The laser allows for easy control of the pulse width and pulse repetition rate, making it suitable for weak acoustic signal detection. Through image acquisition and processing of hair and insulating tape, the developed PA system demonstrates reliability in capturing weak PA signals. The proposed technique can be modified for various conditions and is expected to be useful for both fundamental and applied research in PA imaging system applications.
Review
Chemistry, Analytical
Gelan Ayana, Jaemyung Ryu, Se-woon Choe
Summary: Breast cancer, the most common type of cancer, is often treated with chemotherapy, which has limitations. Nanocarriers, particularly ultrasound-responsive ones, have been introduced to overcome these limitations. This paper reviews recent developments in ultrasound-guided nanocarriers for breast cancer chemotherapy, discusses challenges, and provides insights into future directions.
Review
Chemistry, Analytical
Unsang Jung, Jaemyung Ryu, Hojong Choi
Summary: This paper reviews the applications of absorption spectroscopy in practical photoacoustic effects, with a focus on light sources of different wavelengths. The characteristics and compositions of the light sources used for the applications are investigated based on the absorption spectrum of the target materials.
Article
Biophysics
Hojong Choi, Jaemyung Ryu
Summary: This study proposes a novel optical system design for improving image resolution in photoacoustic systems. By using a telecentric collimator design, higher image quality can be obtained at the target surface.
JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY
(2023)
Article
Chemistry, Multidisciplinary
So Hyun Seo, Jae Myung Ryu, Hojong Choi
APPLIED SCIENCES-BASEL
(2020)