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

共 444 条记录，以下是81-90 订阅

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optical properties of large area diffractive Fresnel-lenses with modified zone-geometry 6

Optical properties of large area diffractive Fresnel-lenses ...

引用

current developments in optical design and engineering VI conference

作者： Zeitner, UD Kley, EB Friedrich-Schiller-Univ. Jena (Germany)

ISBN: (纸本)0819422517

A special surface geometry of diffractive Fresnel-lenses, which is well adapted to the kartesian working regime of most microlithographic machines, is presented in this paper. Due to this adaption the amount of data neccessary for the description of the exposure and also the exposure-time decreases drastically and so the realization of large area diffractive lenses and lens-arrays became possible. In this paper we compare the modified lens-geometry with the common radially symmetrical diffractive Fresnel-lens and we show some experimental results which we obtained for a lens realized by electron-beam lithography.

关键词： Fresnel-lens micro lithography electron-beam lithography

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Double micro-prism array design for reducing dispersion on prism-based stereo camera system

Double micro-prism array design for reducing dispersion on p...

引用

conference on current developments in lens design and optical engineering XIV

作者： Sun, Wen-Shing Chu, Pu-Yi Natl Cent Univ Dept Opt & Photon Chungli 32001 Taiwan

We apply a digital camera with two prism arrays to capture a stereo image of the corrected chromatic aberration and distortion. The doublet prisms are used to correct chromatic aberration. The camera distortion with t... 详细信息

ISBN: (纸本)9780819496911

关键词： stereo image two prism arrays chromatic aberration distortion

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Simulation of Multi-Channel Microlens Array for Image Stitching 19

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

引用

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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optical design of CCF PlanApo microobjectives 50 mm observation and super long working distance 19

Optical design of CCF PlanApo microobjectives 50 mm observat...

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

作者： Frolov, Dmitry N. Vinogradova, Olga A. Frolov, Alexey D. Wen, Liyun Jing, Fanhua Project Labor Microscopes Zapovednaya St 51A St Petersburg 194356 Russia Kozo Opt Ltd 19E18 Zhenghong St Nanjing Jiangsu Peoples R China

The main difference is a significant expansion of the linear field, which reaches 50 mm in the image plane. However, in this case, a planapochromatic correction must be achieved for the usual visible spectral range. S... 详细信息

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

关键词： lens system design optical design and fabrication Microscopy Objectives for microscopes

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Chromatic error correction of diffractive optical elements at minimum etch depths 15

Chromatic error correction of diffractive optical elements a...

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conference on current developments in lens design and optical engineering XV

作者： Barth, Jochen Guehne, Tobias Airbus Def & Space Landshuter Str 26 D-85716 Unterschleissheim Germany Airbus Def & Space D-81663 Munich Germany

ISBN: (纸本)9781628412192

The integration of diffractive optical elements (DOE) into an optical design opens up new possibilities for applications in sensing and illumination. If the resulting optics is used in a larger spectral range we must correct not only the chromatic error of the conventional, refractive, part of the design but also of the DOE. We present a simple but effective strategy to select substrates which allow the minimum etch depths for the DOEs. The selection depends on both the refractive index and the dispersion.

关键词： Diffractive optics Aberration compensation

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designing Aspherics with discrete representation

Designing Aspherics with discrete representation

引用

conference on current developments in lens design and optical engineering III

作者： Wei, N Gong, MI Yan, P Zhang, HT Tsing Hua Univ Dept Precis Instrument Digital Photon Lab Beijing 100084 Peoples R China

ISBN: (纸本)0819445347

We have developed a new method other than traditional technique based on ray tracing and optimization algorithm to design arbitrary aspherics. Analytic definition of the aspheric surfaces is done away with and numerical solution of nonlinear difference equations called Aspheric Intrinsic Equations (AIE) is implemented instead. Simulation results compared with traditional optical design software are presented, which prove that this new method is more effective and reliable in designing aspheric surfaces.

关键词： aspherics discrete representation optical disk lens design

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Afocal viewport optics for underwater imaging 15

Afocal viewport optics for underwater imaging

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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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High magnification zoom lenses for 3-5 μm applications

High magnification zoom lenses for 3-5 μm applications

引用

conference on current developments in optical design and engineering VII

作者： Sinclair, RL Wescam Inc Flamborough ON L9H Canada

ISBN: (纸本)0819428841

Over the past twenty years numerous papers and patents have reported on the design of infrared zoom lenses for a variety of civilian and military applications. The vast majority of these lenses have been afocal 8-12 mu m zoom lenses with magnification ratios of five to twenty. With the advancement of 3-5 mu m staring focal plane array technology a growing demand has emerged for a compact imaging 3-5 mu m zoom lens. To meet this demand a variety of such zoom lenses have been designed which support image formats of over 10 mm diagonal. In this paper the preliminary design of a high magnification 3-5 mu m zoom lens is described. Infrared system modeling, detailed lens performance and manufacturing issues are reviewed.

关键词： infrared lens zoom lenses diffractive optical elements lens design

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Stabilization of the line of sight of a cryogenic optical system

Stabilization of the line of sight of a cryogenic optical sy...

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conference on current developments in lens design and optical engineering VII

作者： Ren, Qifeng Shen, Mangzuo Tan, Shuliang Liao, Sheng Chinese Acad Sci Inst Opt & Elect 4-9 Renminnan Rd Chengdu 610041 Peoples R China

ISBN: (纸本)0819463671

Cryogenic optical systems are often mounted in vacuum cryostat. An interesting concern in the mechanical design is how to maintain the stability of the line of sight (LOS) of the cryogenic optical system when it is cooled down to very low temperature. To investigate this problem an experimental cryogenic optical system, its mounting structure, and a cryostat were designed and fabricated. After assembling them together, a test experiment for measuring the LOS drift was carried out. Finally, the test results will be presented in this paper.

关键词： cryogenic optical system line of sight optomechanical design optical test

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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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