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检索条件"任意字段=Conference on Design and Engineering of Optical Systems II"

共 20635 条记录，以下是201-210 订阅

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Development of FBG Miniature Force Sensors for Tactile Sensing in Robot-Assisted Minimally Invasive Surgery 4

Development of FBG Miniature Force Sensors for Tactile Sensi...

引用

4th International Computational Imaging conference, CITA 2024

作者： Dong, Shiyuan Xiong, Xuanwei Lou, Yuyang Luo, Dong Wu, Jianwei Yang, Tianyu Liu, Huanhuan Dong, Yuming School of Physics and Electronic Engineering Chongqing Normal University Chongqing401331 China Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China The Key Laboratory of Optoelectronic Technology and Systems Chongqing University Chongqing400044 China

ISBN: (纸本)9781510688834

The present study introduces a miniature axial force sensor based on Fiber Bragg Grating (FBG) technology, specifically developed for detecting abnormalities within tissues during robot-assisted minimally invasive surgeries. This FBG force sensor is composed of a single optical fiber engraved with an FBG element, a sensor cap, an elastomer, and a sensor base. The unique structural design of the elastomer enhances sensitivity to axial forces while effectively mitigating interference from transverse forces. Unlike traditional methods that directly bond the FBG, the fiber in this design is suspended tightly at both ends of the elastomer. This approach addresses the issue of uneven adhesive thickness in the FBG region and prevents chirp-related failures. The sensor boasts a compact design with a diameter of only 1.5 mm and a length of 10 mm, making it easily integrable into surgical robots and overcoming the limitations posed by larger sensors in previous designs. Finally, a force calibration experiment was conducted, determining the sensor's sensitivity to be 276 pm/N within a force range of 0-1 N. © 2025 SPIE.

关键词： optical fibers

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NASA SAGE SBIR structural, thermal, optical performance (STOP) analysis correlation to wavefront error testing 10

NASA SAGE SBIR structural, thermal, optical performance (STO...

引用

conference on Photonic Instrumentation engineering X

作者： Buleri, Christine Yow, Cameryn Carey, Janak Damadeo, Robert Halterman, Alexander Hill, Charles Leckey, John Maccarrone, Alicia Weiner, Samantha Yacoby, Shimshone Quartus Engn 9689 Towne Ctr Dr San Diego CA 92121 USA NASA Langley Res Ctr 1 Nasa Dr Hampton VA 23666 USA

ISBN: (纸本)9781510659612;9781510659629

In conjunction with the NASA LaRC SAGE IV Pathfinder team, Quartus has developed a small format near-diffraction limited telescope designed to package into a 6U CubeSat. The SAGE IV Pathfinder telescope utilizes analytical models and designs that can be leveraged to meet a broad range of scientific optical mission needs by creating a family of semi-custom small format space-borne optical systems. During the initial phases of a science mission, a systems engineering assessment can be performed to identify existing designs and analysis tools that can be leveraged to meet many key requirements. This would allow limited resources to then be focused on developing required new components, as opposed to designing the entire optical system from the bottom up. This accelerates technical readiness level (TRL) progression on semi-custom small format precision optical systems, reducing instrument costs, and achieving economy of scale typically not available on one-off science payloads. The current SAGE SBIR Phase ii is a research program utilizing a SAGE-like design for development of STOP analysis correlation methodologies. Wavefront error (WFE) is captured over a variety of temperature ranges for comparison to finite element model (FEM) predictions. The accuracy and repeatability of the WFE measurement process over temperature is reviewed. Best practices for accurate STOP analysis and WFE predictions are summarized including modeling parameters, material properties, and strength and distortion assessments.

关键词： SAGE IV SBIR STOP FEM FEA Correlation WFE Thermal Testing Nastran Zemax SigFit

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design of High Resolution Imaging Spectrometer for Ocean Color Detection 3

Design of High Resolution Imaging Spectrometer for Ocean Col...

引用

3rd International conference on Optics and Machine Vision, ICOMV 2024

作者： Song, Lingling Chen, Xinhua Pan, Qiao Shen, Weimin Key Laboratory of Modern Optical Technologies of Education of China School of Optoelectronic Science and Engineering Soochow University Jiangsu Suzhou215006 China Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province School of Optoelectronic Science and Engineering Soochow University Jiangsu Suzhou215006 China

ISBN: (纸本)9781510680319

In this paper, a visible-near infrared imaging spectrometer optical system is designed, which is used to detect seawater elements and provides a favorable monitoring means for the protection of marine resources. According to the application background of ocean color detection instruments, the index parameters of the instrument are determined, and a high resolution imaging spectrum system is designed. The front telescope system adopts an off-axis three mirror anastigmat without intermediate real image, with the focal length of 590.75mm and the entrance diameter of 118.15mm;The system comprises an innovative spectrometer design with 0.6 magnification. The de-magnifying optical design allows the telescope to operate at F#/5, while the spectrometers are built in a more compact arrangement at F#/*** main mirror and three mirrors use Zernike Fringe Sag surface to compensate for the aberration introduced by breaking the classical Offner concentric and isometric structure. The whole optical system comprises a single telescope feeding two functionally identical spectrometers. The spectral range is 0.4-0.9μm, field of view angle is 19 °, spectral resolution is 5nm and instantaneous field of view angle is 0.048mrad, the full field of view and full band MTF is more than 0.8, which is close to the diffraction limit, the RMS radius is less than 4 μm, and the smile and keystone of the spectrometer are less than 10% pixels. © 2024 SPIE.

关键词： optical systems

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Performance analysis of satellite-to-Earth 16QAM coherent optical communication under the influence of atmospheric turbulence 4

Performance analysis of satellite-to-Earth 16QAM coherent op...

引用

4th International conference on Electronics, Circuits and Information engineering, ECIE 2024

作者： Yang, Jin Yang, Xinquan Guo, Jingzhong China Academy of Space Technology Shaanxi Xi'an China

ISBN: (纸本)9798350388312

Higher-order modulation is a crucial development direction for future satellite-to-Earth coherent optical communication, with atmospheric turbulence being one of the significant influencing factors. This paper considers the impacts of intensity fluctuations and phase jitter caused by atmospheric turbulence and includes active modal compensation for wavefront phase distortion. An approximate analytical expression for the average bit error rate (BER) of satellite-to- Earth 16-Quadrature Amplitude Modulation (16QAM) coherent optical communication is derived. Numerical simulations are conducted to assess the impact of different system parameters on the performance of satellite-to-Earth 16QAM coherent optical communication. The results of these studies hold significant value for the design and optimization of satellite-to-Earth 16QAM coherent optical communication systems. © 2024 IEEE.

关键词： Atmospheric turbulence

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design of photoswitchable adhesives based on azobenzene derivatives 9

Design of photoswitchable adhesives based on azobenzene deri...

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9th International conference on Energy Materials and Electrical engineering, ICEMEE 2023

作者： Ju, Jiaxuan Faculty of Science University of New South Wales Sydney2052 Australia

ISBN: (纸本)9781510672765

The photoisomerization of azobenzene derivative will cause a change in adhesiveness. With this character, some major developments have been made in different adhesive systems. The photothermal effect and photoisomerization of azobenzene under UV light contribute to the conversion of bond strength. This paper summarizes the research achievements and applications of azobenzene derivatives-based optical switch adhesives. And it would put forward the prospect of the next development of photosensitive adhesives. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： azobenzene derivatives photoisomerization photosensitive adhesives photoswitchable adhesives

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Implementation of a large aperture hyperspectral imaging optical system 6

Implementation of a large aperture hyperspectral imaging opt...

引用

6th conference on Frontiers in optical Imaging and Technology: Novel Technologies in optical systems

作者： Zhang, Zhuwei Wang, Bin Wang, Baohua He, Ruicong Li, Huan Wu, Yongjian Beijing Institute of Space Mechanics & Electricity Beijing China Key Laboratory for Advance Optical Remote Sensing Technology of Beijing Beijing China

ISBN: (数字)9781510679672

ISBN: (纸本)9781510679665

With continuous development, the hyperspectral imaging has become a hot topic in the field of remote sensing, since its enormous advantage in obtaining the material composition of atmosphere, land resources, battlefield environment and marine resources while observing the Earth in space. However, some challenges have hindered the application of space-based hyperspectral imaging system. To fulfill the requirements of the spectral imager especially for space use, the lightweight and stable structure is especially important. Here the implementation of a Large Aperture Hyperspectral Imaging optical System is presented. The optical system achieves hyperspectral imaging from ultraviolet to infrared spectral bands. The different spectral bands share a large common aperture of Ø1.8m. A lightweight primary mirror is designed and supported by bipod structure. To keep the large distance between the primary mirror and second mirror, a Lightweight and high-strength truss has been applied. A hierarchical structure is adopt as the main structure of the whole system. With the diffraction gratings and optical slits, the image information of different spectral bands are detected by the different lines of pixels in a focal plane of planar array. By the creative works of the optical and mechanical design, a hyperspectral imaging optical system is implemented and shows the extensive application potential in space remote sensing. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： optical systems

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Compressed hyperspectral imaging based on Fabry Perot structures 6

Compressed hyperspectral imaging based on Fabry Perot struct...

引用

6th conference on Frontiers in optical Imaging and Technology: Novel Imaging systems

作者： Gu, Yanda Chu, Junqiu Ma, Haotong National Key Laboratory of Optical Field Manipulation Science and Technology Chinese Academy of Sciences Chengdu610209 China Key Laboratory of Optical Engineering Chinese Academy of Sciences Chengdu610209 China Institute of Optics and Electronics Chinese Academy of Sciences Chengdu610209 China University of Chinese Academy of Sciences Beijing101408 China

ISBN: (数字)9781510679719

ISBN: (纸本)9781510679702

Spectral information has a wide range of applications in many fields. With the proposal of compressed sensing technology, computational spectral imaging has emerged, which eliminates the complex optical components in the traditional method and dramatically improves the efficiency of spectral imaging by combining optical modulation and computational reconstruction. However, such approaches still have the disadvantages of being expensive and relying on the priori information. In this paper, we propose a spectral imaging method based on Fabry-Perot interference. Our approach is based on several filters with random transmittance. Combined with optical thin film technology, we design thinner dielectric layers to realize the construction of filters, which have unique broad-spectrum modulation properties to perceive spectral information. Compared with the existing wavelength modulation curves, our designed filters have higher transmittance and better compression effects to realize spectral reconstruction with a spectral resolution of 10 nm. Both simulation and experimental results demonstrate the effectiveness of the method used in this paper. © 2024 SPIE.

关键词： Compressed sensing

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Simplified design and simulation analysis of wavefront coding athermal system

Simplified design and simulation analysis of wavefront codin...

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2022 conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022

作者： Huang, Haoyang Wang, Helong Chen, Jianfa Xu, Feixiang Liu, Xuesong Science and Technology on Electro-Optical Control Laboratory Luoyang471009 China Luoyang Institute of Electro-Optical Equipment AVIC Luoyang471000 China

ISBN: (纸本)9781510662476

Wavefront coding is a typical application technology of computational optical *** can make the optical system insensitive to thermal defocusing through special encoding and computational decoding, thus realizing athermal design. Airborne application scenarios require optical systems to meet the imaging requirements of complex temperature fields while minimizing volume and weight. However, the structure of optical passive athermal scheme is usually complex. Based on this application condition, a group of airborne infrared optical systems are designed in this paper. The system does not use an additional phase plate, but allows the lens of the original system to assume both the power and the phase encoding function. At the same time, it is compared with the optical non thermal scheme, and the imaging simulation of the complex temperature gradient environment is carried out. The research shows that the modulation transfer function of the system is relatively consistent under the environment of - 40 ℃ to 60 ℃ and the large temperature difference of each lens, and the imaging quality is good. © 2023 SPIE.

关键词： optical systems

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Custom design of a Glass-Immersed Plan-Apochromat Objective for Oblique-Plane Microscopy

Custom Design of a Glass-Immersed Plan-Apochromat Objective ...

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International optical design conference 2023

作者： Matia-Hernando, Paloma de la Fuente, Marta ASE Optics Europe Carrer de la Cerdanya 44 El Prat de Llobregat Barcelona08820 Spain

We present the optical design and manufacturing tolerancing of a custom plan-apochromat objective for oblique-plane microscopy, featuring high numerical aperture and zero working distance and allowing imaging up to 45... 详细信息

ISBN: (数字)9781510668515

ISBN: (纸本)9781510668508

关键词： optical design

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All-optical tunable integrator based on microring resonator assisted by GST superlattice 2

All-optical tunable integrator based on microring resonator ...

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2nd International conference on optical Communication and optical Information Processing, OCOIP 2024

作者： Zhong, Wentao Dong, Yida Shen, Mei Lei, Lei Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen518060 China China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Academy for Advanced Interdisciplinary Studies Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen518000 China

ISBN: (数字)9781510688995

ISBN: (纸本)9781510688988

This paper presents the design and simulation analysis of a tunable optical integrator based on ZnS-SiO2/Ge2Sb2Te5 superlattice (GST-SL) phase change material (PCM). The transfer function of the integrator is realized through a silicon microring resonator cladded with a three-layer GST-SL (GST-SL3-MRR). The integration of the PCM into the microring resonator enables a reconfigurable Q-factor, allowing for tunable integration orders between 0.5th and 1st. Through laser-induced phase transitions between amorphous and crystalline states, the transmission spectrum of the MRR can be dynamically adjusted. Simulation results show that the integration time window reaches 300 ps for the first-order integration, and the tunable integration results closely align with the ideal mathematical predictions. demonstrating the device's highly tunable performance. Further simulations of applications for quickly solving ordinary differential equations highlight the potential applications of our device in areas such as optical signal processing and image recognition. © 2025 SPIE.

关键词： Zinc Selenide

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