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

共 444 条记录，以下是11-20 订阅

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Athermalizing Mounted Doublets With ALLVAR Alloys 25

Athermalizing Mounted Doublets With ALLVAR Alloys

引用

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...

引用

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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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...

引用

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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Man versus Machine: a lens design Challenge

Man versus Machine: a Lens Design Challenge

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conference on current developments in lens design and optical engineering XIV

作者： Dilworth, Donald C. Shafer, David Optical Systems Design Inc. (United States) David Shafer Optical Design (United States)

After a generation of writing and improving lens design software, it is time to assess where we are. Specifically, can a modern program compete with, or surpass, the best human designers? Here we describe a friendly c... 详细信息

ISBN: (纸本)9780819496911

关键词： lens design global optimization optimization algorithms aberration theory

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New tools for the lens designer

New tools for the lens designer

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conference on current developments in lens design and optical engineering IX

作者： Dilworth, Donald C. Optical Systems Design Inc. (United States)

ISBN: (纸本)9780819472809

Several common impediments to successful lens design can be removed by application of new techniques. These involve using information that has long been calculated during the design process, but then discarded. Problems so addressed include the nuisance of discovering ray failures in the starting configuration, and that of tolerance desensitization, among others.

关键词： lens optimization ray failures tolerance desensitization starting point stop position avoiding strain

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design and Implementation of Recording and Readout System for Micro-holographic optical Data Storage

Design and Implementation of Recording and Readout System fo...

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Takashima, Yuzuru Hesselink, Lambertus Stanford Univ Dept Elect Engn Stanford CA 94305 USA

A lens design having constant working distance while having variable recording depth for micro holographic data storage system has been proposed. Variation of focal length is suppressed for the entire depth within 1% ... 详细信息

ISBN: (纸本)9780819482822

关键词： Holographic Storage Aberrations lens design

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Analytic formulation of a spherochromatic collimator lens 11

Analytic formulation of a spherochromatic collimator lens

引用

conference on current developments in lens design and optical engineering XXI

作者： Gonzalez-Acuna, Rafael G. Gutierrez-Vega, Julio C. Tecnol Monterrey Photon & Math Opt Grp Monterrey Mexico

We introduce a closed-form formula to design a spherochromatic collimator singlet lens. The light for three different wavelengths is collimated at the output of the lens. We test the singlet lens using ray-tracing met... 详细信息

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

关键词： optical design aspheric collimator

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ALGEBRAIC APPROACH FOR OPTIMIZING A TRIPLET lens

ALGEBRAIC APPROACH FOR OPTIMIZING A TRIPLET LENS

引用

conference on current developments in optical design and optical engineering III

作者： KASSIM, AM AL QUDS UNIV COLL SCI & TECHNOLDEPT PHYSJERUSALEMISRAEL

ISBN: (纸本)081941249X

Using the concept of matrix theory for lens design, a triplet lens can be replaced by a singlet lens which has an equivalent system matrix without changing its optical performance. Then, using third order Siedel's first aberration coefficient of the singlet lens is equal to zero, and the focal length and the physical length of the triplet lens are kept constant as constraints, an algebraic technique for optimizing a triplet lens is derived. Results show that this new optimizing technique is more effective than other conventional techniques for optimizing a triplet lens in the case of plane waves.

关键词： lens design Electronic filtering Monochromatic aberrations Refractive index Spherical lenses Geometrical optics optical design optical properties Physics Image quality

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FISHEYE PROJECTION lens FOR LARGE-FORMAT FILM

FISHEYE PROJECTION LENS FOR LARGE-FORMAT FILM

引用

conference on current developments in optical design and optical engineering III

作者： DOSHI, R HUGHES LEITZ OPT TECHNOL MIDLAND L4R 2H2ONCANADA

In this paper, we present a new fisheye projection lens for 8 perforation 70 mm format film. The lens has an aperture of F/2.4 and a total field of view of 163 degree(s). We discuss design considerations, and compare ... 详细信息

ISBN: (纸本)081941249X

关键词： Modulation transfer functions Distortion lens design Projection systems Glasses Tolerancing Laminated object manufacturing Optics manufacturing Spatial frequencies Manufacturing

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Genetic algorithm and its application in lens design 6

Genetic algorithm and its application in lens design

引用

current developments in optical design and engineering VI conference

作者： Chen, XG Yamamoto, K Olympus Optical Co. Ltd. (Canada) Olympus Optical Co. Ltd. (Japan)

ISBN: (纸本)0819422517

Genetic algorithm and its application in lens design is studied. A new algorithm is presented which includes a genetic algorithm (GA) and damped least square (DLS) method. The convergence property of GA in lens design is demonstrated. A GA. generated design is obtained without artificial intervention. The aberration correction has to be done by DLS, and the result is close to the starting configuration generated by GA.

关键词： genetic algorithm lens design optimization

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