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检索条件"任意字段=Current Developments in Optical Design and Optical Engineering 1991"

共 1065 条记录，以下是261-270 订阅

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optical design and analysis of a polarimeter for space applications

Optical design and analysis of a polarimeter for space appli...

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Conference on current developments in Lens design and optical engineering V

作者： Deslis, A Petroy, S Kampe, T Ball Aerosp & Technol Corp Boulder CO 80301 USA

ISBN: (纸本)0819454613

Satellite-based remote sensing offers the best opportunity for studying the properties of atmospheric aerosols and their radiative effects on the global scale over extended periods Tropospheric aerosols represent the largest uncertainty in predicting the radiative forcing of climate (IPCC, 2001). A key question is whether atmospheric aerosols contribute to warming or cool the climate system. Since the sign of direct radiative forcing is controlled by the ability of aerosol particles to absorb light, the information on the single scattering albedo of different aerosol types and its variations with aerosol lifecycles is clearly very desirable. Furthermore, the wavelength-dependent values of single scattering albedo from the UV to IR are important in retrieving aerosol optical depth from satellites passive remote sensing and for climate modeling. We describe the design of a space-borne polarimeter that was derived from the key science requirements. The performance of this candidate polarimeter, operating in the UV/VIS/NIR spectral regions, is described. The optical design form and various optical performance parameters, including transmittance calculations of the polarimeter's spectral channels showing the "leakage" of polarization states, as well as the degree of polarization as function of wavelength and field of view are presented for the various wavelength regions. An overview of the instrument performance and driving operational parameters is presented.

关键词： polarimeter optical design atmospheric aerosols polarization

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Finding starting points analytically for optical system optimization

Finding starting points analytically for optical system opti...

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Conference on current developments in Lens design and optical engineering XIII

作者： Bociort, F. van Grol, P. Delft Univ Technol Opt Res Grp NL-2628 CJ Delft Netherlands

ISBN: (纸本)9780819492036

Understanding the structure of the design space in optical system optimization is difficult, because common human intuition fails when it encounters the challenge of high dimensionality, resulting from the many optimization parameters of lens systems. However, a deep mathematical idea, that critical points structure the properties of the space around them, is fruitful in lens design as well. Here we discuss simple systems, triplets with curvatures as variables, for which the design space is still simple enough to be studied in detail, but complex enough to be non-trivial. A one-to-one correspondence between the possible design shapes and the critical points resulting from a simplified model based on third-order spherical aberration within the framework of thin-lens theory could lead in the future to a new way to determine good starting points for subsequent local optimization.

关键词： saddle point critical point global optimization optical system design

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Three dimensional point spread function of a high aperture optical system

Three dimensional point spread function of a high aperture o...

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Conference on current developments in Lens design and optical engineering XIV

作者： Borovytsky, Volodymyr Chorna, Viktoriia Solovei, Alex Nat Techn Univ Ukraine KPI Dept Opt Engn UA-03056 Kiev Ukraine

ISBN: (纸本)9780819496911

The paper presents the mathematical technique for precise calculation of the three dimensional point spread function (3D PSF) of a high aperture optical system. The proposed technique is based on Huygens-Fresnel principle: a spherical wave at an exit pupil is considered as a numerous set of elementary secondary light sources. They emit spherical coherent electro-magnetic waves. All these waves form a definite distribution of summarized complex amplitudes in a three dimensional space near a focal point. This distribution is used for calculation of the distribution of effective intensity which takes into account the influence of inclined optical beams. The comparison analysis of this approach and the techniques based on multi-dimensional Fourier transforms are discussed.

关键词： point spread function optical system pupil function Fourier transform intensity distribution optical microscopy spatial resolution

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design and analysis of the mirror system with off-axis field-of-view 19

Design and analysis of the mirror system with off-axis field...

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

作者： Romanova, Galina E. Rodionova (Butylkina), Kseniia D. ITMO Univ 49 Kronverkskiy Pr St Petersburg 197101 Russia

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

Nowadays, the development of the space apparatus with high optical characteristics still stays the important task. The simplest systems which can provide the required characteristics for remote monitoring from the space are the three-mirror systems. It can be shown that in many cases, classical three-mirror systems have critical value of obscuration that leads to decreasing of resolution. Using off-axis field of view in the systems provides the way to avoid the obscuration influence. We present a technique for designing the three-mirror telescope objectives based on the systems with axial symmetry with an off-axis field of view.

关键词： mirror telescopes off-axis field of view optical design

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Comparison of Geometrical and Diffraction optical Transfer Functions 16

Comparison of Geometrical and Diffraction Optical Transfer F...

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Conference on current developments in Lens design and optical engineering XVI

作者： Mahajan, Virendra N. Antonio Diaz, Jose Univ Arizona Coll Opt Sci Tucson AZ 85721 USA Univ Granada Dept Opt E-18071 Granada Spain

ISBN: (纸本)9781628417449

The geometrical and diffraction point-spread functions of an optical imaging system have been reviewed and compared in the past [V. N. Mahajan, "Comparison of geometrical and diffraction point-spread functions," SPIE Proc. 3729, 434-445 (1999)]. In this paper, we review and compare its corresponding optical transfer functions. While the truth lies with the diffraction OTF, it is considered easier and quicker to calculate the geometrical Oil, especially for large aberrations. We briefly describe the theory of the two OTFs, and explore the range of spatial frequencies and the magnitude of the primary aberrations over which the geometrical OTF may provide a reasonable approximation of the diffraction OTF.

关键词： optical transfer functions Monochromatic aberrations Spatial frequencies Diffraction Actinium Imaging systems Geometrical optics optical imaging Modulation transfer functions Fourier transforms

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Enhancement of light luminance film applied to the transparent display devices 17

Enhancement of light luminance film applied to the transpare...

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Conference on current developments in Lens design and optical engineering XVII

作者： Chiu, Chuang-Hung Chen, Yueh-Hao Chien, Wei-Cheng Chien, Chao-Heng Chunghwa Picture Tubes LTD Taiwan Taoyuan Taiwan Tatung Univ Taipei Dept Mech Engn Taipei Taiwan

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

Recently, the display device was developed to apply to the transparency display device(TDD), but the TDD was no brightness. The purpose of this paper was introduced a double layer optical film to improve luminance of the TDD. The film was doped micro metal oxide particles to increase the effect of scattering and refraction, and the micro structure was fabricated between the top and bottom film to enhance the light into the TDD. This research provided a transparent double layer optical film. The transparency of the film was achieved to 70 %, and the brightness efficiency up to 60 %.

关键词： Transparent display devices optical film Luminance Micro-particles

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A Toolkit for Multiscale optical System Inverse-design 23

A Toolkit for Multiscale Optical System Inverse-Design

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Conference on current developments in Lens design and optical engineering XXIII Part of SPIE Optics and Photonics Conference

作者： Campbell, Sawyer D. Jenkins, Ronald P. Zerbe, Benjamin A. Whiting, Eric B. Balasubramanian, Manushanker Das, Arkaprovo Young, Jacob T. Werner, Douglas H. Werner, Pingjuan L. Penn State Univ Sch Elect Engn & Comp Sci University Pk PA 16802 USA

ISBN: (纸本)9781510654198;9781510654181

optical system design is undergoing a transformational change with the increases in computational horsepower, cutting-edge algorithmic developments, and the advent of new nanofabrication technologies. Among the most exciting advances in recent memory are optical metasurfaces, which are patterned surfaces commonly realized through nanofabrication that can imbue optical engineers with expanded degrees of design freedom due to their ability to exploit the generalized form of Snell's law. Through intelligent optimization and design, metasurfaces can be constructed which achieve arbitrary chromatic dispersion behaviors and unprecedented control over polarization that simply cannot be realized with conventional optical elements. However, designing high-performance metasurfaces requires the use of full-wave simulation tools and numerical optimization techniques which necessitate considerable computational resources. Moreover, while optical metasurfaces are moving towards millimeter and centimeter scale diameter lenses with advances in nanofabrication techniques, it is computationally infeasible to employ full-wave simulation tools directly to model optical systems that use such large size elements. Nevertheless, the size, weight, and power (SWaP) advantages afforded by optical metasurfaces make them a compelling choice for designers to consider in a number of applications, which are currently limited by bulky conventional optical solutions. Therefore, techniques that can rapidly model metasurfaces in conjunction with conventional optical elements such as lenses, mirrors, and prisms are highly desirable. In this presentation, we highlight a toolkit of custom solvers, design procedures, and powerful optimization algorithms that simplify and accelerate the development of hybrid optical systems with arbitrary combinations of conventional and metasurface elements.

关键词： optical design optimization inverse-design gradient-index lenses metasurfaces simulation multiscale

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Caustic surface of a plane wavefront refracted by a smooth arbitrary surface 15

Caustic surface of a plane wavefront refracted by a smooth a...

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Conference on current developments in Lens design and optical engineering XV

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

ISBN: (纸本)9781628412192

We study the formation of caustic produced by smooth arbitrary surfaces considering a plane wavefront propagating parallel to the optical axis and impinging on the refracting surface. We have already seen that the shape of the caustic surface can represent the monochromatic aberrations that we call image errors, furthermore the shape of the caustic can be modified by changing the parameters of the lens in such a way that if the caustic surfaces is vanished the optical system produces a perfect image, on the other hand for a caustic possessing a large area it could be applied to design no-imaging optical systems. The shape of the caustic depends only on the indices of refraction involved in the process of refraction, the refracting surface which is formed by smooth arbitrary plano-convex lens. We provide an analytic equation for the caustic surface after refraction of a plane wave from every rotationally symmetric surface.

关键词： Refraction Aspheric lenses Wavefronts Ray tracing optical design Geometrical optics Monochromatic aberrations Light Radon Wave propagation

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design study of a 2.2x zoom lens using plastic materials

Design study of a 2.2x zoom lens using plastic materials

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Conference on current developments in Lens design and optical Systems engineering

作者： Shi, WM Newell, MP Fischer, RE OPT 1 Inc Westlake Village CA 91362 USA

No abstract available.

ISBN: (纸本)0819437387

No abstract available.

关键词： Zoom lenses Distortion Glasses Aspheric lenses Lens design Vignetting Chemical elements Cameras Plastic lenses Chromatic aberrations

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design of an anastigmatic three-mirror telescope using freeform surfaces 11

Design of an anastigmatic three-mirror telescope using freef...

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Conference on current developments in Lens design and optical engineering XXI

作者： Alvarado-Martinez, J. J. Granados-Agustin, F. S. Vazquez-y Montiel, S. Cornejo-Rodriguez, A. A. INAOE Luis Enrique Erro 1 Sta Maria Tonanzintla Cholula Pue Mexico UIEPA Los Ilanos Kilometro 1 San Andres Tlayehualanci Ahuacatlan Pue Mexico

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

This paper proposes the design of an anastigmatic three-mirror telescope using freeform surfaces for the correction of spherical aberration, coma, astigmatism, and field curvature, allowing a wide field of view (FOV) and high resolution. For the structure of this telescope, it is proposed to use only two optical elements where the primary and tertiary mirrors are integrated into an only optical element and the secondary mirror in the other, thus achieving a considerable reduction in the difficulty of alignment and assembly. To achieve a high performance of the telescope, the system was decentered (off-axis design), avoiding the loss of energy due to the obscuration of the M-2 in the on-axis system. In addition, to solve the difficult access to the focus.

关键词： optical design three-mirror system freeform on-axis system off-axis system

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