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

共 446 条记录，以下是41-50 订阅

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Changing field of view by applying voltage difference 23

Changing field of view by applying voltage difference

引用

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

作者： Sakarya, Dogan Ugur Roketsan Tact Missile Syst Grp TR-06780 Ankara Turkey

ISBN: (纸本)9781510654198;9781510654181

Dual field of view optical systems provide search, detect and observation abilities with wide and narrow field of views. These systems provide dual field of view by changing the effective focal length with moving a lens or lens group mechanically to exact positions. In this paper, previously proposed methodology is used to change effective focal length without any mechanical movement. This methodology relies on ionization of fluid with voltage difference to change the refractive index which is patented in 2022.

关键词： Observation system field of view zoom lens design voltage difference solution ionization

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New aberration properties of two-mirror Cassegrain lenses

New aberration properties of two-mirror Cassegrain lenses

引用

conference on current developments in lens design and optical engineering III

作者： Bezdidko, SN Sci Ctr House Opt Moscow Russia

Analysis of aberration performance of two-mirror Cassegrain lens allowed revealing an interesting relationship between them and the central obscuration coefficient epsilon and the distance delta of the focal plane fro... 详细信息

ISBN: (纸本)0819445347

关键词： lens design aberration performance two-mirror Cassegrain lens

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Research on chromatic properties of high order kinoform 15

Research on chromatic properties of high order kinoform

引用

conference on current developments in lens design and optical engineering xv

作者： Wegrzynska, K. Rachon, M. Doch, M. Siemion, A. Suszek, J. Kolodziejczyk, A. Sypek, M. Warsaw Univ Technol Fac Phys PL-00662 Warsaw Poland

ISBN: (纸本)9781628412192

This work is dedicated to the evaluation of the chromatic properties of high order kinoforms. Typical kinoform (of the first order) is a phase only structure having the phase retardation varying in the range 0-2 pi. Such structures are very commonly used in many practical applications for different ranges of electromagnetic radiation like ultraviolet, visible, infrared, terahertz and millimeter waves. Besides those benefits such structures have one crucial disadvantage - they suffer from big chromatic aberration. This limits their practical application only to the narrowband work, where main wavelength must be well defined (Delta lambda/lambda<<1). This paper presents other type of diffractive structures called high order kinoforms (HOK). They exhibit phase retardation of n2 pi, where n is an integer number much bigger than 1. Due to this fact they are relatively thin and therefore can be manufactured using laser lithography in thick photoresist (deeply etched). On the other hand they are thick enough to suppress chromatic aberrations. In comparison to the well-known Fresnel lens, the high order kinoform structure has precisely controlled phase retardation between different zones. In the case of the Fresnel lens (known from xvIII/XIX century), phase retardations between different zones are random (designing process is based on the geometrical optics). In the case of the high order kinoform working as the spherical lens - taking into account the real size of the detector - it can be shown that the most of the energy being focused in the focal spot will be registered by the detector for different wavelengths. The paper presents simple theoretical considerations, numerical modeling and their experimental evaluation.

关键词： diffractive optics kinoform higher order kinoform chromatic aberration optical elements

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optical systems for free-space laser communications

Optical systems for free-space laser communications

引用

conference on current developments in lens design and optical engineering IV

作者： Hemmati, H CALTECH Jet Prop Lab Pasadena CA 91109 USA

An overview of optical systems utilized in JPL's optical Communications research is provided here. These include discussions on the flight terminal optics, the ground receiver aperture and the uplink beacon or com... 详细信息

ISBN: (纸本)0819450464

关键词： telescope flight optics photon buckets and optical communications

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Infrared hybrid optics: analysis and implementation

Infrared hybrid optics: analysis and implementation

引用

conference on current developments in lens design and optical engineering II

作者： Wood, AP THALES Opt Ltd St Asaph LL17 0LL Denbighshire Wales

ISBN: (纸本)0819441554

Hybrid optics offer a valuable aberration correction tool for the lens designer. However, careful consideration must be given to the calculation of the optical performance during the design process, and to the practical implementation of the elements if the potential benefits are to be realised in practice. optical performance can be accurately assessed by tracing multiple diffraction orders. It may be particularly important to utilise such a technique if, for example, the image-forming bundles sample a small number of diffractive zones. This situation is examined in detail.

关键词： optical design infrared diffractive optics

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The entrance pupil of an on-axis stigmatic singlet lens 11

The entrance pupil of an on-axis stigmatic singlet 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 64849 Mexico

We derive a closed-form expression for the entrance pupil of the on-axis stigmatic singlet lens, and discuss its performance for a variety of conditions, including positive or negative indices of refraction, and diffe... 详细信息

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

关键词： optical design spherical aberration telescopes aberration theory

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Development of surgical binoculars on the basis of polymeric lenses 18

Development of surgical binoculars on the basis of polymeric...

引用

conference on current developments in lens design and optical engineering xvIII

作者： Voznesenskaya, Anna Andreev, Lev Ekimenkova, Alisa ITMO Univ 49 Kronverksky Av St Petersburg 197101 Russia

The basis of this work is a modification of the modern design of surgical binoculars based on substitution of mineral glasses with polymer lenses. Aberration analyses of the proposed systems is shown.

ISBN: (纸本)9781510612082;9781510612075

关键词： polymeric lenses medical optics surgical binoculars optical system design ergonomics

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design of an expander lens for an MWIR zoom camera using the third-order aberration analysis 23

Design of an expander lens for an MWIR zoom camera using the...

引用

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

作者： Yun, Min-Seok Ryu, Tae-Sik Park, Sung-Chan Dankook Univ Dept Phys 119 Dandae Ro Cheonan Si 31116 Chungcheongnam South Korea

ISBN: (纸本)9781510654198;9781510654181

This study presents the methods for designing an expander lens for an MWIR zoom lens through the third-order aberration analysis and evaluating the optical zoom system. This expander lens is used to enlarge the focal lengths of an original main zoom lens two times, which unfortunately doubles the aperture size of the expander lens elements. Thus, this extended apertures significantly generate the aberrations of a zoom system. To solve the problem, an expander lens has been designed using the third-order aberration analysis numerically. Since an MWIR optical system uses a cooled detector, this zoom system should be designed to eliminate the narcissus effect. Using this design approach, we efficiently obtain an expander lens for an MWIR zoom system satisfying the current requirements.

关键词： Zoom lenses Monochromatic aberrations optical spheres Mid-IR Chemical elements lens design Transparent conductors Modulation transfer functions Spherical lenses Infrared radiation

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Using the toroidal and cylindrical lenses to project the RGB LEDs sources on the lens array with elliptic solid angle calculation for the DLP projector

Using the toroidal and cylindrical lenses to project the RGB...

引用

conference on current developments in lens design and optical engineering XIV

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

We present an asymmetric condenser with an elliptical solid angle distribution and improves system efficiency of 15.5%. The proposed system on the DMD achieves the light efficiency of 63.4% and the average deviation o... 详细信息

ISBN: (纸本)9780819496911

关键词： RGB LEDs DLP projector lens array elliptical solid angle

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lens design USING A MINIMUM NUMBER OF GLASSES 4

LENS DESIGN USING A MINIMUM NUMBER OF GLASSES

引用

conference on current developments in optical design and optical engineering IV

作者： ZHANG, SY SHANNON, RR UNIV ARIZONA CTR OPT SCITUCSONAZ 85721

ISBN: (纸本)0819415871

Due to increasing environmental limitations on the use of certain raw materials used to make optical glasses, there is now an economic desire to minimize the number of glasses used in lens design. This paper presents the results of a study to create a suggested universal catalogue that contains the minimum number of glasses needed to satisfy most possible lens designs. A nearly symmetric double Gauss lens is used in the glass selection process. As part of this study, the relationship between the error function and the number of glasses chosen is studied, and in addition, a glass range study is also carried out. Three different lens libraries were studied using the global optimization method and the most frequently chosen glasses were then compiled into the suggested universal glass catalogue. A suggested universal glass catalogue constructed from this study is presented.

关键词： optical GLASS lens design

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