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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101-110 订阅

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Mechanical design and analysis of a variable focal length lens

Mechanical design and analysis of a variable focal length le...

引用

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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NEW design METHOD FOR ATHERMALIZED optical-SYSTEMS

NEW DESIGN METHOD FOR ATHERMALIZED OPTICAL-SYSTEMS

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CONF ON current developments IN optical design AND optical engineering 2

作者： TAMAGAWA, Y WAKABAYASHI, S TAJIME, T Mitsubishi Electric Corp. (Japan)

ISBN: (纸本)0819409251

This paper describes a new design method for athermalized optical systems. It can be accomplished by combining optical materials and by selecting suitable lens powers. However, there are difficulties in determining material and power of each lens, because achromatism is simultaneously required. To determine the condition of eliminate thermal focus shift and longitudinal chromatic aberration easily by simple drawing, an athermal chart is proposed which is constructed by plotting chromatic dispersive power and thermal dispersive power on a cartesian coordinate system.

关键词： Modulation transfer functions Zinc Colorimetry Germanium Chromatic aberrations Temperature metrology Visualization Gallium arsenide Refractive index Thermography

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ALIGNMENT OF AN ASPHERIC MIRROR SUBSYSTEM FOR AN ADVANCED INFRARED CATADIOPTRIC SYSTEM

ALIGNMENT OF AN ASPHERIC MIRROR SUBSYSTEM FOR AN ADVANCED IN...

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

作者： TINGSTAD, JS Hughes Aircraft Co. (United States)

ISBN: (纸本)0819406554

With many optical systems the method that is used to align the optical system needs to be an integral portion of the system design and not an afterthought. Once all the pieces are in fabrication it may be too late to implement a cost-effective alignment procedure for both prototype and production designs. This is especially true with catadioptric systems where the mirror alignment tends to be very critical as far as system performance is concerned. This paper describes the design and use of an aspheric null mirror for the alignment of a two mirror subsystem to a lens cell. The optical system to be aligned was a six-in. EFL, F/2 system working in the 3-5 micrometers bandpass. It consisted of two aspheric mirrors, one aspheric lens, and two spherical lenses.

关键词： Mirrors Aspheric lenses optical alignment Aspheric optics Combined lens-mirror systems optical engineering Infrared imaging Infrared radiation optical design Spherical lenses

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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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Polarization fields for understanding polarization aberrations in optical imaging systems

Polarization fields for understanding polarization aberratio...

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Conference on current developments in lens design and optical engineering XIV

作者： Sasian, Jose Univ Arizona Coll Opt Sci Tucson AZ 85721 USA

This paper provides a set of polarization aberration fields that are useful for understanding polarization aberrations in optical imaging systems. The aberration function of a plane symmetric system is used to build t... 详细信息

ISBN: (纸本)9780819496911

关键词： polarization aberrations optical imaging systems

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A zoom lens from scratch: the case for number crunching 17

A zoom lens from scratch: the case for number crunching

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Conference on current developments in lens design and optical engineering Xvii

作者： Dilworth, D. C. Opt Syst Design Inc Boothbay ME 04544 USA

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

The art of lens design has long been divided into two camps: theorists and number crunchers. Both camps have vocal supporters, both manage to get the job done, and both occasionally voice disdain for the other. This paper presents the case for number crunching-while recognizing the important contributions that theorists have made and continue to make. We illustrate this case by designing a zoom lens with no starting design and minimum direction from the designer. To this end we use a feature called ZSEARCH (TM) found in the program SYNOPSYS (TM)(1).

关键词： lens design global optimization zoom lens Damped Least Squares (DLS) Pseudo-Second Derivative (PSD) SYNOPSYS (TM)

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PLASTIC lens ARRAY WITH THE FUNCTION OF FORMING UNIT MAGNIFICATION ERECT IMAGE USING ROOF PRISMS

PLASTIC LENS ARRAY WITH THE FUNCTION OF FORMING UNIT MAGNIFI...

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

作者： TAKAHASHI, E TANJI, S TANAKA, A HAYASHI, Y Fujitsu Ltd. (Japan)

ISBN: (纸本)0819406554

An original plastic-lens array molded integrally as one block having a function of forming a unit-magnification erect image has been developed. The lens array consists of eight lens devices. The lens device has a roof prism, a reflecting v-groove, and a pair of convex-lens surfaces. A prototype of the lens arrays are arranged side by side. Thickness of the lens array is 4.5 mm, distance between object and image planes is 14.4 mm, array pitch is 1.3 mm, and the effective imaging region is 220 mm. The average modulation transfer function (MTF) at 41 p/mm of the lens array is 76% in the row direction (Y-direction) and 80% in the direction (X-direction) normal to Y-direction. The average F/NO in line-scanning is 1.8. The average irradience unevenness in line-scanning is 17%. The focal depth is +/- 0.6 mm in the area with the MTF being 60% or more. With this prototype a high-resolution image was attained. So, the lens arrays can be applied to imaging devices for use in a compact facsimile, image scanner, LED printer, and so on.

关键词： optical engineering Prisms Prototyping Modulation transfer functions optical design lens design Fringe analysis Imaging arrays Imaging devices Scanners

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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...

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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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Changing field of view by applying voltage difference 23

Changing field of view by applying voltage difference

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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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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...

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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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