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Conference on current developments in Lens design and optical engineering XXV

作者： Syu, Jhih-Ling Huang, Po-Sung Ma, Shih-Hsin Feng Chia Univ Dept Photon Taichung Taiwan

ISBN: (纸本)9781510679221;9781510679238

This study aims to investigate the impact of Bulk Scattering Diffuser (BSD) on color variation in Mini-LED backlight modules under different optical parameters. To predict spectral distribution distortion of BSD in Mini-LED backlight module, a virtual Mini-LED backlight is built in the optical simulation software. The scattering behavior of BSD is also established by the calculation model based on Mie scattering theory. In simulations, the corresponding color coordinate of distorted spectrum is moved in the CIE 1931 color space owing to varying parameters of BSD. Finally, under the condition of highly color uniformity, through the comparison between the color coordinates and the MacAdam ellipse, the suitable manufacturing parameters of BSD are discussed.

关键词： Mini-LED Backlight module Bulk scattering diffuser Color temperature MacAdam's ellipse

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Development of Transmission and Receiving optical Antenna for Free Space Laser Communication 25

Development of Transmission and Receiving Optical Antenna fo...

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Conference on current developments in Lens design and optical engineering XXV

作者： Chen, Ching-Wei Chen, Liang-Tang Tsai, Tung-Hung Yang, Yi-Ling Huang, Ming-Tse Taiwan Space Agcy TASA 8F9 Prosper 1st RdHsinchu Sci Pk Hsinchu 300 Taiwan CALIN TECHNOL CO LTD 24 Jianguo Rd Taichung Taiwan

ISBN: (纸本)9781510679221;9781510679238

A transmission and receiving optical antenna is built-in-house by TASA and Taiwan domestic optical company CALIN. A Cassegrain type telescope is designed and manufactured with primary aperture 80 mm. It could provide the transmitted and received gain about 104 dB, and the obscuration loss about -3.8 dB in the link channel for free space optical laser communication. It could also be integrated in the CubeSat or in the optical communication terminal for small satellite missions. The root-mean-square wave front error for the optical antenna is less than 100 nm. The optical aberrations introduced on-axis WFE loss is estimated about -0.72 dB in the link budget. An eyepiece is designed to locate near the focus of telescope to collimate the output beam with beam size about 3.3 similar to 4.7 mm for propagating 50 cm distance in the follow-up communication module system. With the strong supporting domestic electro-optical industry, it is expected to help a lot on the development of the Taiwan space technology.

关键词： optical antenna link budget optical communication Cassegrain telescope wave front error

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Athermalizing Mounted Doublets With ALLVAR Alloys 25

Athermalizing Mounted Doublets With ALLVAR Alloys

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Conference on current developments in Lens design and optical engineering XXV

作者： Monroe, James A. Fehlberg, Olivia Zavislan, James M. ALLVAR 1201 East Fayette St Syracuse NY 13210 USA Tucson Adv Design & Assembly Ctr Edmund Opt 2650 E Elvira RdSte 102 Tucson AZ 85756 USA Univ Rochester Inst Opt 480 Intercampus Dr Rochester NY 14627 USA

ISBN: (纸本)9781510679221;9781510679238

Thermal requirements often constrain optical designs resulting in cost or performance compromises. Unless an optical system is designed from the start considering thermal requirements, effects including thermal defocus can become detrimental to the system's real-world performance. Novel negative thermal expansion ALLVAR Alloys enable a new degree of freedom during initial system design or can be used to passively athermalize an existing optical system without having to re-design. This work discusses the analysis and integration of ALLVAR Alloy 30 into an optomechanical housing to athermalize mounted commercial off-the-shelf (COTS) doublets. Calculations for the thermal defocus of the doublets and the requisite opto-mechanics to athermalize each system are first presented. The target athermalization of the doublets is also discussed. The ALLVAR Alloy 30 athermalized doublet assemblies are then manufactured, built, and tested. The results of the as-built data and testing are presented as compared to the thermal defocus analysis. This work demonstrates that an existing optical system design can be athermalized by utilizing an ALLVAR Alloy material in the optomechanical design.

关键词： Athermalization thermal Negative Thermal Expansion ALLVAR Alloy Doublet Optomechanics optomechanical design

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Flexible mechano-optical sensors from mechanoluminescence to mechanoplasmonics: designs, applications, and prospects

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JOURNAL OF MATERIALS CHEMISTRY C 2025年第5期13卷 2058-2090页

作者： Tao, Wei Xue, Yufeng Hu, Qinhua Yin, Ling Liu, Ye Maurer, Thomas Fleischer, Monika Dongguan Univ Technol DGUT CNAM Inst Dongguan 523106 Peoples R China Univ Technol Troyes Lab Light Nanomat & Nanotechnol L2n CNRS UMR 7076 F-10004 Troyes France Eberhard Karls Univ Tubingen Inst Appl Phys D-72076 Tubingen Germany Eberhard Karls Univ Tubingen Ctr LISA D-72076 Tubingen Germany Dongguan Univ Technol Sch Elect Engn & Intelligentizat Dongguan 523106 Peoples R China Univ Lille Sci Cite Cent Lille F-59000 Lille France

Flexible mechano-optical sensors (FMOS) achieve quantitative sensing of mechanical stimuli by monitoring changes in optical response, and due to the incorporation of a polymeric matrix/substrate, they exhibit high flexibility, elasticity, and biocompatibility. This wireless and visualized sensing capability offers potential for both in situ and in vivo applications. In this review, we delve into the mechanisms and developments of two types of FMOS: "active" mechanoluminescence (ML) and "passive" mechanoplasmonics (MP). The focus is on how ML particles and polymers can be combined in various configurations (such as bulk, laminar, and woven blending systems) to yield robust, multifunctional, and hybrid optical/electrical properties, exploring their potentials in engineering, information, and wearable/implantable applications. Additionally, the tunability of ML intensity and emission color under mechanical and various environmental stimuli is summarized, leading to a discussion on the versatile MP nanostructures. With their sophisticated artificial design, MP demonstrates promise for both small-scale sensing and high-level control over spectral wavelength and intensity. Lastly, based on current research on ML and MP, challenges and prospects for combining these two technologies to advance the field of FMOS are proposed.

关键词： optical sensors

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current developments in Lens design and optical engineering XXII

Current Developments in Lens Design and Optical Engineering ...

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current developments in Lens design and optical engineering XXII 2021

ISBN: (纸本)9781510644663

The proceedings contain 17 papers. The topics discussed include: 360 degree white light holography display on surface of transparency conical cup;depth-of-field comparison between the plenoptic camera 1.0 and 2.0;wide gamut lighting and color contrast in anomalous trichromacy;iterative and inverse design of a segmented reflector for uniform illumination on the road;effects of multilayer thin film coatings on different thermochromic materials for thermal storage applications;talbot effect from structures with periodic Bessel and sinusoidal profiles;large volumetric optical-resolution photoacoustic microscopy with image fusion based on CNN feature extraction;and an optimal lens arrangement in high numerical aperture objectives.

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Silicon Metalens toward a fully Silicon integrated SWIR sensing 25

Silicon Metalens toward a fully Silicon integrated SWIR sens...

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Conference on current developments in Lens design and optical engineering XXV

作者： Dupre, Matthieu Ma, Jian Hseih, Biay-cheng Goma, Sergio Qualcomm Technol Inc 5775 Morehouse Dr San Diego CA 92121 USA

ISBN: (纸本)9781510679221;9781510679238

Most Silicon based depth and lidar sensors rely on near-infrared (NIR 750-900nm) sources to produce depth images as Silicon CMOS sensors can achieve a high quantum efficiency for an unbeatable cost at such wavelengths. Advances in short wave infrared (SWIR) sensor technologies, such as Silicon-Germanium sensors, changes this paradigm and opens a new window for groundbreaking sensor designs, as SWIR can push the wavelength above retinal hazard area (>1400nm), allowing for much higher eye safety, due to the low penetration of those wavelengths through the eye lens. Here, we propose to use a Silicon Metalens flat optics and build upon our stacked sensor technologies to obtain a fully Silicon integrated stacked sensor at SWIR wavelengths. We will discuss the design of the stacked sensor and focus on the Silicon Metalens for multiple use-cases. We will demonstrate the results of our Silicon metalens prototype at 1550nm. We will show numerical simulations of the optical stack for eye-tracking application or wide-angle time of flight (TOF) and discuss the necessary trade-offs.

关键词： metalens ToF sensors XR optics lens design

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Power Allocation Schemes in optical Wireless Communication 25

Power Allocation Schemes in Optical Wireless Communication

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Conference on current developments in Lens design and optical engineering XXV

作者： Elewah, Ibrahim A. Amer Coll Middle East ACM Dept Engn & Technol Kuwait Kuwait Amer Univ Middle East AUM Coll Engn Kuwait Kuwait

ISBN: (纸本)9781510679221;9781510679238

In this work, detailed literature about the power allocation schemes in optical wireless communication has been presented and discussed. The main goal is to evaluate the gain ratio power allocation (GRPA) and normalized gain difference power allocation (NGDPA) schemes in a 4x4 multiple-input multiple-output (MIMO) non-orthogonal multiple access (NOMA) based visible light communication (VLC) system. The work will evaluate the GRPA and NGDPA according to the system's overall achievable sum-rate and the sum-rate gain. The proposed MIMO-VLC system can utilize up to 4 subscribers regardless of their current position within the system coverage area. The work will examine the received bit rate of each user in different positions within the system coverage area. Target to maintain the same bit rate for each user, especially when the user is at the border of the system coverage area. Finally, the study will discuss the results before and after applying the power allocation schemes GRPA and NGPDA. It has been concluded the overall sum rate gain percentages after applying GRPA are lower than NGDPA, which gives the GRPA allocation scheme an advantage over NGDPA.

关键词： VLC MIMO GRPA NGDPA NOMA

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iii-Arsenide separate confinement heterostructure infrared laser diodes with engineered the cladding layers

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PHYSICA B-CONDENSED MATTER 2024年 683卷

作者： Saeed, Sana Usman, Muhammad Ali, Shazma Mustafa, Laraib Anjum, Iqra Bashir, Jamshad Ghulam Ishaq Khan Inst Engn Sci & Technol Fac Engn Sci Topi 23460 Khyber Pakhtunk Pakistan

In this work, iii-Arsenide laser diodes (LDs) show better optoelectronic properties when the aluminum (Al) concentration in the cladding layer is increased up to 95 % in a separate confinement heterostructure (SCH). These laser diodes show their peak gain the infrared lasing wavelength of similar to 840 nm. Enhancing the Al in the n- and p-cladding layers, both separately and simultaneously in LDs, shows that the optoelectronic properties are reasonably improved. The output light power has been increased to 50 mW at a current density of 13 x 10(4)A/cm(2), with 95 % aluminum in both the n- and p-claddings. The modal field intensity has increased by 5 %, and the optical confinement factor (OCF) has improved from 0.0102 to 0.0105 in the proposed device. Consequently, the engineered cladding design, incorporating varied aluminum concentrations, is recognized as pivotal for optimizing the performance of arsenide laser diodes.

关键词： iii-Arsenide Laser diodes Single quantum well Infrared Separate confinement heterostructure optical confinement factor Power

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UV optical Surface Cleaning with First Contact Polymer 14

UV Optical Surface Cleaning with First Contact Polymer

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current developments in Lens design and optical engineering XXIV 2023

作者： Beasley, Matthew Eloriaga, Noel Davis, Michael Veach, Todd Space Systems Division Southwest Research Institute 6220 Culebra Road San AntonioTX78238-5166 United States

ISBN: (纸本)9781510665460

At Southwest Research Institute (SwRI), the ultraviolet (UV) calibration lab successfully tested First Contact Polymer (FCP) cleaning solution on unprotected gold mirrors in the UV region. This investigation proved that the cleaning solution meets the contamination threshold of 2 and passes the relative reflectance differences threshold of © 2023 SPIE.

关键词： Calibration

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Review on Advancements and Challenges in Terahertz optical Communication

Review on Advancements and Challenges in Terahertz Optical C...

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2024 International Conference on Smart Electronics and Communication Systems, ISENSE 2024

作者： Anujan, Titto Jose, Tony Vijayan, Vismaya Karunya Institute of Technology and Sciences Division of ECE Tamil Nadu Coimbatore641114 India College of Engineering Trivandrum Department of Electronics and Communication Engineering Kerala 695016 India

ISBN: (纸本)9798331528126

The frequency range of terahertz (THz) has shown great promise for optical communication due to its enormous bandwidth and low interference. This review paper provides a thorough analysis of the latest developments and current obstacles in THz optical *** microwave and infrared wavelengths, the terahertz (THz) frequency range has special possibilities for optical communication *** investigates how THz frequencies and optical communication are convergent, emphasising the latter's promise for high-bandwidth, low-latency data transfer. We investigate possible uses of THz optical communication, such as sensing, imaging, and wireless networks, highlighting the revolutionary influence of this new sector on the design of communication systems in the future. © 2024 IEEE.

关键词： Bandwidth

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