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

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A zoom lens from scratch: the case for number crunching 17

A zoom lens from scratch: the case for number crunching

引用

Conference on current developments in lens design and optical engineering Xvii

作者： Dilworth, D. C. Opt Syst Design Inc Boothbay ME 04544 USA

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

The art of lens design has long been divided into two camps: theorists and number crunchers. Both camps have vocal supporters, both manage to get the job done, and both occasionally voice disdain for the other. This paper presents the case for number crunching-while recognizing the important contributions that theorists have made and continue to make. We illustrate this case by designing a zoom lens with no starting design and minimum direction from the designer. To this end we use a feature called ZSEARCH (TM) found in the program SYNOPSYS (TM)(1).

关键词： lens design global optimization zoom lens Damped Least Squares (DLS) Pseudo-Second Derivative (PSD) SYNOPSYS (TM)

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A study of optical design of zoom optics

A study of optical design of zoom optics

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Conference on current developments in lens design and optical engineering XIV

作者： Tsai, Cheng-Mu Yen, Chih-Ta Fang, Yi-Chin Chen, Chia-An Natl Kaohsiung First Univ Sci & Technol Coll Engn Dept Mech & Automat Engn 2 Jhuoyue Rd Kaohsiung 811 Taiwan Kun Shan Univ Dept Comp & Commun Tainan 710 Taiwan Natl Formosa Univ Dept Elect Engn Huwei Township 632 Yunlin Taiwan

ISBN: (纸本)9780819496911

This paper proposes a new zoom lens design with intermediate image. The two 3x zoom lenses are independently designed and then cascaded to a 9x zoom lens. The concept of intermediate optics is applied in this paper in order to minimize size of front diameter and overall length. The final layout shows the proposed 9x zoom lens can effectively miniature the front diameter of lens about 44.25%.

关键词： intermediate optics zoom lens optical system design

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Analytic formulas of the aspheric terms for convex-plano and plano-convex aspheric lenses

Analytic formulas of the aspheric terms for convex-plano and...

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Conference on current developments in lens design and optical engineering XIV

作者： Avendano-Alejo, Maximino Univ Nacl Autonoma Mexico Ctr Ciencias Aplicadas & Desarrollo Tecnol Mexico City 04510 DF Mexico

ISBN: (纸本)9780819496911

We provide analytic formulas for fews aspheric terms either plano-convex or convex-plano aspheric lenses. These formulas are obtained considering an expansion in Taylor's series from exact caustic equation produced by aspheric lenses. A comparison between our method and numerical methods of design are presented, showing a well agreement in order to reduce the spherical aberration.

关键词： Aspheric lenses Monochromatic aberrations Refraction Manganese Geometrical optics lens design Numerical analysis Distortion optical components optical design

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Afocal viewport optics for underwater imaging 15

Afocal viewport optics for underwater imaging

引用

Conference on current developments in lens design and optical engineering XV

作者： Slater, Dan 1352 Dorothea Rd La Habra Hts CA 90631 USA

ISBN: (纸本)9781628412192

A conventional camera can be adapted for underwater use by enclosing it in a sealed waterproof pressure housing with a viewport. The viewport, as an optical interface between water and air needs to consider both the camera and water optical characteristics while also providing a high pressure water seal. Limited hydrospace visibility drives a need for wide angle viewports. Practical optical interfaces between seawater and air vary from simple flat plate windows to complex water contact lenses. This paper first provides a brief overview of the physical and optical properties of the ocean environment along with suitable optical materials. This is followed by a discussion of the characteristics of various afocal underwater viewport types including flat windows, domes and the Ivanoff corrector lens, a derivative of a Galilean wide angle camera adapter. Several new and interesting optical designs derived from the Ivanoff corrector lens are presented including a pair of very compact afocal viewport lenses that are compatible with both in water and in air environments and an afocal underwater hyper-hemispherical fisheye lens.

关键词： Afocal lens design underwater photography water contact lens Ivanoff corrector lens dome port hyperhemispherical fisheye lens

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optical schemes for compact space objectives 18

Optical schemes for compact space objectives

引用

Conference on current developments in lens design and optical engineering XviiI

作者： Butylkina, K. D. Romanova, G. E. Bakholdin, A., V ITMO Univ 49 Kronverksky Pr St Petersburg 197101 Russia

ISBN: (纸本)9781510612082;9781510612075

The most widely used objectives for the space optics are mirror and catadioptric systems. We have considered several scheme types including the three-mirror schemes both of the Korsch-type and the systems without an intermediate image and compare them from the point of view of packaging conditions, image quality and achievable characteristics. The two-mirror systems with lens correctors are also analyzed. The optical layout and parameters of several variants are presented and the image quality is shown.

关键词： three-mirror systems Korsch scheme lens correctors optical systems design

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Application of GPUs in optical design software 20

Application of GPUs in optical design software

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Conference on current developments in lens design and optical engineering XX

作者： Mischuck, Brian Page, Erik Croce, Alessandra Zemax 10230 NE Points Dr 500 Kirkland WA 98033 USA

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

We present an overview of the pros and cons of using GPUs in optical design software. While GPUs can run multiple calculations in parallel, that parallelization comes with a price. We will discuss the trade-offs that allow GPUs to run up to thousands of cores in parallel and how those trade-offs effect the use of GPUs in optical design software. In particular, we review the use of GPUs in several steps of design calculations, including ray-tracing and computationally expensive steps such as calculating Huygens integrals.

关键词： OpticStudio GPU PSF Scientific Computing

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design of lens hoods for the "Lira-B" space telescope 19

Design of lens hoods for the "Lira-B" space telescope

引用

19th Conference on current developments in lens design and optical engineering

作者： Muratov, Artem Olyunin, Vyacheslav Bacholdin, Alexey Voznesenskaya, Anna ITMO Univ 49 Kronverksky Av St Petersburg 197101 Russia

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

The space investigation project "Lira-B" is purposed to perform a high-precision multicolor photometric all-sky survey of objects from 3 to 16 m. This investigation concludes in multiple photometric measurements in ten spectral bands from 200 to 1000 nm. Such telescope systems should provide maximum light gathering and meet stray light requirements. The main goal of the given work is optical design of the telescope system with lens hoods protecting against the parasitic illumination. Analysis of impact of the lens hoods' surface structure and coatings on the image quality is performed and ways to reduce the stray light in the system. The modeling is carried out using Zemax OpticStudio software in the non-sequential mode.

关键词： Lira-B Zemax lens hood telescopic system

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PLASTIC lens ARRAY WITH THE FUNCTION OF FORMING UNIT MAGNIFICATION ERECT IMAGE USING ROOF PRISMS

PLASTIC LENS ARRAY WITH THE FUNCTION OF FORMING UNIT MAGNIFI...

引用

5TH CONF ON current developments IN optical design AND optical engineering

作者： TAKAHASHI, E TANJI, S TANAKA, A HAYASHI, Y Fujitsu Ltd. (Japan)

ISBN: (纸本)0819406554

An original plastic-lens array molded integrally as one block having a function of forming a unit-magnification erect image has been developed. The lens array consists of eight lens devices. The lens device has a roof prism, a reflecting v-groove, and a pair of convex-lens surfaces. A prototype of the lens arrays are arranged side by side. Thickness of the lens array is 4.5 mm, distance between object and image planes is 14.4 mm, array pitch is 1.3 mm, and the effective imaging region is 220 mm. The average modulation transfer function (MTF) at 41 p/mm of the lens array is 76% in the row direction (Y-direction) and 80% in the direction (X-direction) normal to Y-direction. The average F/NO in line-scanning is 1.8. The average irradience unevenness in line-scanning is 17%. The focal depth is +/- 0.6 mm in the area with the MTF being 60% or more. With this prototype a high-resolution image was attained. So, the lens arrays can be applied to imaging devices for use in a compact facsimile, image scanner, LED printer, and so on.

关键词： optical engineering Prisms Prototyping Modulation transfer functions optical design lens design Fringe analysis Imaging arrays Imaging devices Scanners

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Mechanical design and analysis of a variable focal length lens

Mechanical design and analysis of a variable focal length le...

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Conference on current developments in lens design and optical engineering viiI

作者： Gonzalez-Garcia, Jorge Cruz-Martinez, Victor Manuel Mendoza-Jasso, Alvaro Jesus Santiago-Alvarado, Agustin Vazquez-Montiel, Sergio Rayas-Alvarez, Juan Antonio Castro-Ramos, Jorge Univ. Tecnológica de la Mixteca (Mexico) Instituto Nacional de Astrofísica Óptica y Electrónica (Mexico) Ctr. de Investigaciones en Óptica (Mexico)

ISBN: (纸本)9780819468154

Studies on adaptive lenses, which are formed of two transparent elastic surfaces and have a transparent liquid medium between them, have focused mostly on the characterization, analysis and optical performance of the proposed lenses. No attention, however, has been given to the mechanical design that would allow the conception of a user-friendly functional mounting that is adaptable to conventional optical systems. This work, therefore, presents the design and manufacturing processes of the mounting for a 20 mm diameter biconvex adaptive lens. It also presents an analysis of the membranes used as elastic surfaces and the images formation of the proposed lens.

关键词： adaptive elastic surfaces liquid lens mounting design

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Simulation of Multi-Channel Microlens Array for Image Stitching 19

Simulation of Multi-Channel Microlens Array for Image Stitch...

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19th Conference on current developments in lens design and optical engineering

作者： Chao, Chien Su, Guo-Dung Natl Taiwan Univ Grad Inst Photon & Optoelect 1 Roosevelt RdSect 4 Taipei Taiwan

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

In this study, we propose a new micro-optical system with 1.65 zoom ratio for image stitching. The new system with four layers is based on microlenses and liquid lens arrays. In order to realize the zoom function, we design the first and the fourth layers by the liquid lens and we also set up the second and the third layers as the fixed lens to tilt the optical axes. The length of the system is 6.4 mm, the image size 8.6 x 6.6 mm(2), the field of view (FOV) 50 degrees in wide mode and the field of view 28 degrees in tele mode. The MTF and distortion are used to demonstrate the zoom function, the stitching function and the stitching with zoom function, respectively. We use the ZEMAX ray-tracing software to demonstrate the simulation of image stitching in wide and tele modes.

关键词： Image system Micro-optics optical design Array Zoom system Liquid lens system

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