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检索条件"任意字段=Current Developments in Lens Design and Optical Engineering XVII"

共 577 条记录，以下是11-20 订阅

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optical simulation of the white light display color change of the bulk scattering diffuser used in the mini-LED backlight module 25

Optical simulation of the white light display color change o...

引用

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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Integration of optical waveguide technology with multi-channel color sensors for enhanced urine test strip analysis system 25

Integration of optical waveguide technology with multi-chann...

引用

Conference on current developments in lens design and optical engineering XXV

作者： Li, Yi-Ming Lee, Tsung-Xian Natl Taiwan Univ Sci & Technol Grad Inst Appl Sci & Technol 43Keelung RdSec 4 Taipei 106335 Taiwan Natl Taiwan Univ Sci & Technol Grad Inst Color & Illuminat Technol 43Keelung RdSec 4 Taipei 106335 Taiwan

ISBN: (纸本)9781510679221;9781510679238

Urine test strips aid in prompt health assessment through color changes, but visual interpretation can be misleading, particularly with strips having multiple functions. To tackle this, some companies and studies have created paper strip analyzers using CMOS sensors. However, issues like ambient light and shooting angles often cause detection failures. Therefore, this study proposes integrating a multi-channel color sensor as the core component of a urine test strip analysis system and optical waveguide technology for optical system design architecture. This design aims to capture more color information in urine, and the optical waveguide technology ensures uniform light guidance, providing real-time transmission and high-quality signal data for urine analysis systems.

关键词： urine test strips multi-channel color sensor optical waveguide light-emitting diode

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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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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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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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design of ophthalmic contact lens using Q-type aspheres with reduced error budget for high visual acuity 25

Design of ophthalmic contact lens using Q-type aspheres with...

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Conference on current developments in lens design and optical engineering XXV

作者： Peng, Wei-Jei Lee, Tsung-Xian Natl Taiwan Univ Sci & Technol Grad Inst Appl Sci & Technol 43Sec 4Keelung Rd Taipei 106 Taiwan Natl Taiwan Univ Sci & Technol Grad Inst Color & Illuminat Technol 43Sec 4Keelung Rd Taipei 106 Taiwan

ISBN: (纸本)9781510679221;9781510679238

This paper investigates the design of an ophthalmic rigid contact lens (CL) that has a Q-type aspheric surface to reduce the tolerance error budget and produce higher visual acuity. CLs for myopia correction are typically made with spherical surfaces;when such CLs are worn in darkness, the visual acuity degrades severely due to the spherical aberration generated by pupil dilation. To maximize visual acuity, an aspheric CL is essential because it can correct the spherical aberration. In this study, a CL is designed based on a schematic eye model for evaluating the modulation transfer function (MTF) on the retina, and the result shows that the visual acuity produced by an aspheric CL is superior to that produced by a spherical CL. The traditional power-series polynomial is commonly used for aspheric surface design, but the aspheric slope cannot be controlled during optimization. The large slope departure from a best-fit sphere leads to high tolerance sensitivity and an inflection point;however, the CL does not permit such results. To solve this problem, the Q-type polynomial with slope constraint proposed by Forbes is applied to the aspheric CL in this study. The Q-type aspheric polynomial can not only enhance the optimization efficiency due to its orthogonal characteristics, but also reduce error budget for maximal manufacturing yield. The simulation results demonstrated that the spherical aberration is successfully reduced by the Q-type aspheric CL for better visual acuity in darkness.

关键词： Rigid contact lens Q-type asphere power-series asphere myopia correction spherical aberration schematic eye model

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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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Halogen source illumination optimization using a beam shaping biconic lens array 14

Halogen source illumination optimization using a beam shapin...

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current developments in lens design and optical engineering XXIV 2023

作者： Smeesters, Lien Rosseel, Dries Vervaeke, Michael Thienpont, Hugo Department of Applied Physics and Photonics Pleinlaan 2 Brussels1050 Belgium

ISBN: (纸本)9781510665460

Illumination optical design using non-coherent sources is of major interest for sensing applications requiring a uniform illumination. We present the development of a custom biconic lens array, enabling beam shaping of a halogen source array to a rectangular uniform illumination. First, the tungsten halogen sources were accurately modelled considering the near-field emission pattern and broadband spectrum. Following, the illumination lens array is optimized, including a study on the optimal arrangement and pitch of the array, and ensuring a manufacturable design by taking the optical and mechanical tolerances into account. The optimized lens array comprises of custom lenses (Ø 20 mm) featuring a first spherical surface and a second biconic surface with different radii of curvature and aspherical coefficients (up to the 8th order) in the X and Y direction. A spatial uniformity, defined as the standard deviation of the flux distribution, of 0.0002 was achieved within the envisioned illumination area of 50 x 20 mm2 being close to a perfect uniformity considering a targeted value of 0. Finally, the aspheric biconic lens is manufactured using ultraprecision diamond tooling (Nanotech 350FG), and its performance is successfully validated in a laboratory demonstrator setup, giving rise to an optimized and uniform halogen source illumination. © 2023 SPIE.

关键词： optical design

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Dioptric Plan Multi Apochromat objectives for microscopes. optical design 14

Dioptric Plan Multi Apochromat objectives for microscopes. O...

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current developments in lens design and optical engineering XXIV 2023

作者： Frolov, Dmitry N. Vinogradova, Olga A. Frolov, Alexey D. Pavlii, Aleksandr D. Project Labor-microscopes St.-Petersburg Russia LLC "Optotekhnika" St.-Petersburg Russia

ISBN: (纸本)9781510665460

For some types of studies on a microscope, optics is required, which has a multi apochromatic aberration correction in a continuous spectral range from the nearest short -wave UV to the nearest IR spectral areas. In the NUV range, in some cases, it is required to ensure the focus of laser sources radiation on the wavelengths of 248, 222, 213 and even 193 Nm. The work is also required for the near IR region, for example, for focusing laser sources radiation on wavelengths 1315, 1523 and even 2010 and 2080 nm. A priori such optics should also work in a visible spectral range. All studies can be carried out within the indicated a continuous NUV - NIR of the range. We propose to investigate the fundamental possibility of creating lens objectives for which chromatic aberrations are corrected in a wide spectral range. In addition, optics are required for research in the SWIR, MWIR, and LWIR spectral ranges. © 2023 SPIE.

关键词： Microscopes

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A File Sharing Site for lens designs 23

A File Sharing Site for Lens Designs

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Conference on current developments in lens design and optical engineering XXIII Part of SPIE Optics and Photonics Conference

作者： Reiley, Daniel J. Claff, William Burbank (United States) Sherborn (United States)

ISBN: (纸本)9781510654198;9781510654181

A file sharing site for lens designs has been started at *** . This site currently contains almost 2,000 optical models. Many engineering disciplines have built public libraries of useful, publicly-available content. For example, GITHUB(1) has publicly-available software;GrabCAD(2), 3DcontentCentral(3), TurboSquid(4) all offer mechanical engineering content such as solids files;TI, Analog, etc. offer reference designs for electronics engineers. Generally, these services aren't just file repositories;they also offer collaboration, yielding more models, more refinement, more discussion, more community, and more to learn. lens designers can also benefit from such design libraries. This paper explains the utility and structure of the site.

关键词： lens design

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