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A compact and cost effective design for cell phone zoom lens

A compact and cost effective design for cell phone zoom lens

引用

conference on current developments in lens design and optical engineering VIII

作者： Chang, Chir-Weei Wu, Ching-Chin Ind Technol Res Inst Elect & Optoelect Res Labs 195Sec 4Chung Hsing Rd Hsinchu 310 Taiwan EFUN Technol Co Ltd Tainan 70955 Taiwan

ISBN: (纸本)9780819468154

A compact zoom lens design for cell phone is presented. A three groups lens system with five lens element is designed for cell phone camera with 3M pixels and 2.5 similar to 3X optical zoom. The first lens is a negative lens with a concave surface facing the object so that, when used for a long focal length, the rear principle plane is moved forwards to shorten the total length of the lens. A positive lens group composed of three lens elements is arranged at the second lens group. By control the optical power of the second lens group, the distortion can be reduced and also shortens the moving distance of the second lens group while zooming. The fifth lens in the third lens group is a positive lens to control the incident angle entering the photosensitive element. It is used for focusing when the object distance has changed.

关键词： zoom lens cell phone total track length

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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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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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Optimization of a mobile phone camera for as-built performance 11

Optimization of a mobile phone camera for as-built performan...

引用

conference on current developments in lens design and optical engineering XXI

作者： Joo, Joonha Alisafaee, Hossein Rose Hulman Inst Technol Dept Phys & Opt Engn 5500 Wabash Ave Terre Haute IN 47803 USA

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

The work presented here shows a compact lens system that demonstrates improved imaging quality performance while focusing on as-built performance and design for manufacturing. Using Zemax, we consider an approach for optimizing for as-built performance and incorporate the approach into the design process for a mobile phone camera. The optimized design consists of 6 plastic aspheric lenses, an infrared glass filter, and a 12 MP CMOS image sensor. The optical system demonstrates high-resolution imaging and has a field-of-view of 87.6 degrees, an F-number of 2.0, a maximum distortion of less than 2.5%, and a total track length of 6.630 mm.

关键词： optical design Optimization Tolerancing design for manufacturing Zemax

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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 ...

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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...

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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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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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