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

共 605 条记录，以下是161-170 订阅

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Rear landscape on steroids

Rear landscape on steroids

引用

current developments in lens design and optical engineering viiI

作者： Mouroulis, Pantazis Jet Propulsion Laboratory California Institute of Technology Pasadena CA 91109

ISBN: (纸本)9780819468154

Some all-spherical designs are presented that are variations of the positive-negative-positive triplet with the stop at the front. Examples include a compact wide angle (60° field of view) near-telecentric lens, as well as super-achromatic, telecentric lenses for the visible to infrared (450-1000nm or 450-2300 nm) and mid-wave and thermal infrared. This design form, loosely thought of as a boosted version of the rear landscape lens, has provided a useful optimization starting point for a variety of designs with different requirements.

关键词： optical systems

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Effects of Substrate heating and Vacuum Annealing on optical and Electrical Properties of Alumina-Doped ZnO Films Deposited by DC Magnetron Sputtering

Effects of Substrate heating and Vacuum Annealing on Optical...

引用

Conference on current developments in lens design and optical engineering XII/Advances in Thin Film Coatings vii

作者： Tang, Chien-Jen Wang, Chun-Yuan Jaing, Cheng-Chung Minghsin Univ Sci & Technol Dept Optoelect Syst Engn Hsinchu 304 Taiwan

ISBN: (纸本)9780819487384

Alumina-doped zinc oxide (AZO) films have wide range of applications in optical and optoelectronic devices. AZO films have advantage in high transparency, high stability to hydrogen plasma and low cost to alternative ITO film. AZO film was prepared by direct-current (DC) magnetron sputtering from ceramic ZnO:Al2O3 target. The AZO films were compared in two different conditions. The first is substrate heating process, in which AZO film was deposited by different substrate temperature, room temperature, 150 degrees C and 250 degrees C. The second is vacuum annealing process, in which AZO film with deposited at room temperature have been annealed at 250 degrees C and 450 degrees C in vacuum. The optical properties, electrical properties, grain size and surface structure properties of the films were studied by UV-VIS-NIR spectrophotometer, Hall effect measurement equipment, x-ray diffraction, and scanning electron microscopy. The resistivity, carrier mobility, carrier concentration, and grain size of AZO films were 1.92x10(-3) Omega-cm, 6.38 cm(2)/Vs, 5.08x10(20) #/cm(3), and 31.48 nm respectively, in vacuum annealing of 450 degrees C. The resistivity, carrier mobility, carrier concentration, and grain size of AZO films were 8.72x10(-4) Omega-cm, 6.32 cm(2)/Vs, 1.13x10(21) #/cm(3), and 31.56 nm, respectively, when substrate temperature was at 250 degrees C. Substrate heating process is better than vacuum annealed process for AZO film deposited by DC Magnetron Sputtering.

关键词： Alumina-Doped ZnO films DC magnetron sputtering vacuum annealed substrate heating process optical properties Electrical properties

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Practical guide to saddle-point construction in lens design

Practical guide to saddle-point construction in lens design

引用

Conference on current developments in lens design and optical engineering viiI

作者： Bociort, Florian van Turnhout, Maarten Marinescu, Oana Delft Univ Technol Opt Res Grp Lorentzweg 1 NL-2628 CJ Delft Netherlands

ISBN: (纸本)9780819468154

Saddle-point construction (SPC) is a new method to insert lenses into an existing design. With SPC, by inserting and extracting, lenses new system shapes can be obtained very rapidly, and we believe that, if added to the optical designer's arsenal, this new tool can significantly increase design productivity in certain situations. Despite the fact that the theory behind SPC contains mathematical concepts that are still unfamiliar to many optical designers, the practical implementation of the method is actually very easy and the method can be fully integrated with all other traditional design tools. In this work we will illustrate the use of SPC with examples that are very simple and illustrate the essence of the method. The method can be used essentially in the same way even for very complex systems with a large number of variables, in situations where other methods for obtaining new system shapes do not work so well.

关键词： optical system design optimization saddle points

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Composition variants for mirror high-aperture lens with compact design 17

Composition variants for mirror high-aperture lens with comp...

引用

Conference on current developments in lens design and optical engineering Xvii

作者： Ezhova, Kseniia Zverev, Victor Chuhlamov, Anton Burtseva, Anastasiia ITMO Univ 49 Kronverkskiy Prospect St Petersburg 197101 Russia

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

The theoretical basis for the mirror high-aperture optical system synthesis, based on the properties of the reflecting surface accepted as the base having a shape of a paraboloid of rotation are considered in the work design parameters and residual aberrations tables of the few design solutions for considered optical systems are presented. From the analysis of aberration correction of the image formed by the considered optical system, it follows that the angular value image space is limited, primarily, the image surface curvature. To compensate for curvature of the image surface can be applied Smith lens. The additional condition that determines a high aperture ratio of the optical system of the considered lens as a whole was introduced, but it complicates the process of correcting the aberrations of a wide beam of rays. It is shown that the use of afocal Mersenne system with known anaberration properties, allows you to build a series of compact and SLR mirror-lens systems with aplanatic, anastigmatic and plananastigmatic aberration correction formed the image, at the same time the length of the system is about four times smaller than the diameter of its entrance pupil. Importantly, when applying the lens for using in a long wavelength range emission, the requirements for aberration correction image formed by the lens are reduced, and accordingly, manufacturability are increases.

关键词： the reflecting surface afocal system aplanatic correction of aberrations the lens compensator

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Material selection for an achromatic and athermal design using the factor of determination on optical glasses 20

Material selection for an achromatic and athermal design usi...

引用

Conference on current developments in lens design and optical engineering XX

作者： Lim, Tae-Yeon Kim, Kum-Ho Park, Sung-Chan Dankook Univ Dept Phys 119 Dandae Ro Cheonan Si 31116 Chungcheongnam South Korea

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

This study presents a new method for selecting a pair of optical glass and housing material to achromatize and athermalize a lens system, by use of the factor of determination for material selection. To effectively obtain an optimum combination for materials, we newly propose the sequential material selection method by introducing the factor of determination for material selection, which depends on the level of contribution to correct these aberrations and the availability to be used as a suitable material. Even though there are many cases for material combinations, we can sequentially identify the best pair of glass and housing materials by checking the factor of determination. Using this design approach, we efficiently obtain an achromatic and athermal system through an optimum combination of materials, over the specified ranges in temperature and waveband.

关键词： lens design athermalization achromatization graphic solution

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Scene-based sensor modeling using optical design software

Scene-based sensor modeling using optical design software

引用

Conference on current developments in lens design and optical engineering viiI

作者： Fisher, John Brandywine Opt Inc Chester PA USA

ISBN: (纸本)9780819468154

The traditional approach to optical system engineering separates the scene, optics, and detector as static entities, optimizing the design to meet subsystem specifications of aperture, field size, encircled energy, read noise, dynamic range, and other electro-optical properties. The Scene-Based Sensor Model (SBSM) represents a different approach by simulating the scene, optics and detector as a cohesive model using commercially available optical ray-tracing software. The objects are modeled as temporally changing entities, with characteristics including reflectance, absorbance, fluorescence, and scattering. Likewise, the detectors are modeled with their properties of temporal noise, spatial non-uniformity, nonlinear gain, and offset drift. The end-to-end simulation produces "photons-to-bits" analysis applicable to a variety of optical systems. First results are illustrated with ray tracing simulation of moving fluorescent objects and laser induced breakdown spectroscopy.

关键词： optical system design ray-tracing simulation sensor model FRED optical design software Matlab

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Development of methods for accurate modeling of optical equipment for three-dimensional printing 17

Development of methods for accurate modeling of optical equi...

引用

Conference on current developments in lens design and optical engineering Xvii

作者： Saitgalina, A. K. Tolstoba, N. D. Mitiushkin, A., V ITMO Univ Dept Appl & Comp Opt Kronverksky Ave 49 St Petersburg 197101 Russia

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

The task of this research project is to define the extent of applicability of such 3D self-manufacture approach to the production of optical fastenings. The resulting lack of equipment, to be used for demonstration of simple experiments, which would be both competitive in performance and cheap to produce, led to the decision to research opportunities for self-manufacturing.

关键词： Three-dimensional printing Student Research Laboratory for optical engineering optical equipment printing capabilities 3D printers Accuracy optical instruments

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AN ATTEMPT TO DEVELOP ZOOM lens design EXPERT SYSTEM

AN ATTEMPT TO DEVELOP ZOOM LENS DESIGN EXPERT SYSTEM

引用

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

作者： WENG, ZC CHEN, ZY YANG, YH REN, T CONG, XJ YAO, YC HE, FL LI, YY State Key Laboratory of Applied Optics Changchun Institute of Optics and Fine Mechanics Academia Sinica P.O. Box 1024 Changchun 130022 China Dept. of Computer Science Jilin University Changchun China

We have developed zoom lens design expert system intended to operate with little user intervention. The paper puts the emphasis on the knowledge representation, system architecture, reasoning and control strategy of t... 详细信息

ISBN: (纸本)0819406554

关键词： Expert systems

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Finite-difference method in non-orthogonal curvilinear coordinate system used for electron gun design

Finite-difference method in non-orthogonal curvilinear coord...

引用

Conference on current developments in optical design and engineering vii

作者： Wang, C Yin, HC Xue, KX Tong, LS Southeast Univ Elect Res Inst Nanjing 210018 Jiangsu Peoples R China

ISBN: (纸本)0819428841

A Finite-Difference Method in Non-Orthogonal Curvilinear Coordinate System (FDM-NOCCS) is the combination of the domain transformation technique and the Finite-Difference Method (FDM). It has the visualization and simplification of the traditional FDM. On the other hand. it overcomes the weakness of EDM in dealing with complicated boundary shapes, averts the interpolation between the grid points in the vicinities of boundaries, and also avoids the abnormalism in the transformation from the physical domain to the computational domain. The FDM-NOCCS is used in the computer aided design of electron gun for color cathode ray tube. Compared with the formal FDM, the FDM-NOCCS can save quite a lot of CPU time and computer memory. FDM-NOCCS works well with the complicated e-gun systems design.

关键词： electron gun computer aided design finite difference method curvilinear coordinate system

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Aplanatic hybrid lenses

Aplanatic hybrid lenses

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Conference on current developments in lens design and optical engineering viiI

作者： Garcia-Lievanos, O. Vazquez-Montiel, S. Inst Nacl Astrofis Opt & Electr Luis Enr Erro 1 Puebla 72000 Mexico

ISBN: (纸本)9780819468154

We propose a novel method to correct the spherical and coma aberration using a hybrid element (refractive-diffractive). The refractive surface is used to correct the coma, we obtain this condition curving the second principal plane and centred it on the axial point image. The diffractive element is used to correct the spherical aberration using an exact ray trace and the diffractive coefficients as variables. The optimization routine is no required. This method can be used for any conjugates position.

关键词： Monochromatic aberrations Ray tracing lenses lens design Refractive index Spherical lenses Diffraction gratings Distance measurement optical spheres Refraction

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