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

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High magnification zoom lenses for 3-5 μm applications

High magnification zoom lenses for 3-5 μm applications

引用

conference on current developments in optical design and engineering vii

作者： Sinclair, RL Wescam Inc Flamborough ON L9H Canada

ISBN: (纸本)0819428841

Over the past twenty years numerous papers and patents have reported on the design of infrared zoom lenses for a variety of civilian and military applications. The vast majority of these lenses have been afocal 8-12 mu m zoom lenses with magnification ratios of five to twenty. With the advancement of 3-5 mu m staring focal plane array technology a growing demand has emerged for a compact imaging 3-5 mu m zoom lens. To meet this demand a variety of such zoom lenses have been designed which support image formats of over 10 mm diagonal. In this paper the preliminary design of a high magnification 3-5 mu m zoom lens is described. Infrared system modeling, detailed lens performance and manufacturing issues are reviewed.

关键词： infrared lens zoom lenses diffractive optical elements lens design

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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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Progress in the SMS design method for imaging optics

Progress in the SMS design method for imaging optics

引用

conference on current developments in Lens design and optical engineering XII/Advances in Thin Film Coatings vii

作者： Lin, Wang Benitez, Pablo Minano, J. C. Infante, Jose Biot, Guillermo Univ Politecn Madrid CEDINT E-28040 Madrid Spain

ISBN: (纸本)9780819487384

In this work, two SMS algorithms are presented for an objective design with different selected ray-bundles: three meridian ray-bundles (3M) and one meridian and two skew ray-bundles (1M-2S), the latter from pin hole point of view, provides a better sampling of the phase space. Results obtained with different algorithms will be compared.

关键词： SMS method telephoto lens Meridian ray-bundle Skew ray-bundle imaging system

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A novel laser Doppler linear encoder using multiple-reflection optical design for high-resolution linear actuator

A novel laser Doppler linear encoder using multiple-reflecti...

引用

conference on current developments in optical design and engineering vii

作者： Shu, DM Alp, EE Barraza, J Kuzay, TM Mooney, TM Argonne Natl Lab Expt Facil Div Adv Photon Source Argonne IL 60439 USA

ISBN: (纸本)0819428841

A novel laser Doppler linear encoder system (LDLE) has been developed at the Advanced Photon Source, Argonne National Laboratory A self-aligning 3-D multiple-reflection optical design was used for the laser Doppler displacement meter (LDDM) to extend the encoder system resolution. The encoder is compact [about 70 mm(H) x 100 mm(W) x 250 mm(L)] and it has sub-Angstrom resolution 100 mm/sec measuring speed, and 300 mm measuring range. Because the new device affords higher resolution, as compared with commercial laser interferometer systems, and yet cost less, it will have good potential for use in scientific and industrial applications.

关键词： linear encoder angular encoder laser encoder high resolution actuator

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Optomechanical design of a multi-axis stage for the SPARCLE telescope

Optomechanical design of a multi-axis stage for the SPARCLE ...

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conference on current developments in optical design and engineering vii

作者： Peters, B Blackwell, T Li, Y Geary, J Amzajerdian, F Bailey, D Univ Alabama Ctr Appl Opt Huntsville AL 35899 USA

ISBN: (纸本)0819428841

A critical component in the 2-mu m coherent spaced-based lidar system (SPARCLE) is the compact,off;axis, 25-cm aperture telescope. The stressing optical performance demanded from this telescope coupled with the difficulty associated with aligning such a fast, off-axis system;has created the need for a multiple-axis alignment stage for the secondary minor. Precision micrometer kinematic mounts were used in the laboratory to demonstrate the ability to successfully align the telescope. For the flight configuration, a more robust and considerably smaller stage (both in size and weight) had to be designed in order to fit within the space shuttle packaging constraints. The new stage operates with multiple degrees of freedom of motion to achieve micrometer precision alignment and then uses a mechanical multiple point support to lock-in the alignment and provide stability. The optomechanical design of the flight stage is described.

关键词： lidar telescope optomechanical design

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Linear precision inertial actuator built for low impact, in-situ installation on structures with vibration problems

Linear precision inertial actuator built for low impact, in-...

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conference on current developments in optical design and engineering vii

作者： Updike, CA Greeley, SW King, JA Planning Syst Inc Melbourne Controls Grp Melbourne FL USA

ISBN: (纸本)0819428841

In the process of designing a control actuator for a. vibration cancellation system demonstration on a large, precision optical testbed, it was discovered that the support struts on which the control actuators attach could not be disassembled. This led to the development of a Linear Precision ACTuator (LPACT) with a novel two piece design which could be clamped around the strut in-situ. The design requirements, LPACT characteristics, and LPACT test results are fully described and contrasted with other earlier LPACT designs. Cancellation system performance results are presented for a 3 tone disturbance case. Excellent results, on the order of 40 dB of attenuation per tone (down to the noise floor on two disturbances), are achieved using an Adaptive Neural Controller (ANC).

关键词： actuator design magnetic circuit active vibration cancellation tonal disturbances adaptive neural control

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Looking for order in the optical design landscape

Looking for order in the optical design landscape

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conference on current developments in Lens design and optical engineering vii

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

ISBN: (纸本)0819463671

In present-day optical system design, it is tacitly assumed that local minima are points in the merit function landscape without relationships between them. We will show however that there is a certain degree of order in the design landscape and that this order is best observed when we change the dimensionality of the optimization problem and when we consider not only local minima, but saddle points as well. We have developed earlier a computational method for detecting saddle points numerically, and a method, then applicable only in a special case, for constructing saddle points by adding lenses to systems that are local minima. The saddle point construction method will be generalized here and we Will show how, by performing a succession of one-dimensional calculations, many local minima of a given global search can be systematically obtained from the set of local minima corresponding to systems with fewer lenses. As a simple example, the results of the Cooke triplet global search will be analyzed. In this case, the vast majority of the saddle points found by our saddle point detection software can in fact be obtained in a much simpler way by saddle point construction, starting from doublet local minima.

关键词： saddle point optimization optical system design lithography

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Cryogenic Lens design Case Study: Gemini Planet Imager Spectrograph

Cryogenic Lens Design Case Study: Gemini Planet Imager Spect...

引用

conference on current developments in Lens design and optical engineering XII/Advances in Thin Film Coatings vii

作者： Thibault, S. Univ Laval Dept Phys Quebec City PQ G1V 0A6 Canada

ISBN: (纸本)9780819487384

Making a lens design working at cryogenic temperature is a real challenge. Both optical and mechanical designer must work together to prevent problems during operation. The Gemini Planet Imager (GPI), currently under construction will be a facility instrument for the 8-m Gemini South telescope. The science instrument is a cryogenic integral field spectrograph based on a lenslet array. The integral field nature of the instrument allows for a full mapping of the focal plane at coarse spectral resolution. With such a data cube, artifacts within the PSF such as residual speckles can be suppressed. Additionally, the initial detection of any candidate planet will include spectral information that can be used to distinguish it from a background object: candidates can be followed up with detailed spectroscopic observations. The optics between the lenslet array and the detector are essentially a standard spectrograph with a collimating set of lenses, a dispersive prism and a camera set of lenses in a folded assembly. This paper describes the process from the first preliminary design to the final cryogenic system for both optical and mechanical design to achieve cryogenic working solution. We also discussed the assembly procedure (room temperature vs cryogenic compensation), the test support equipments and finally the laboratory optical performances over the field of view.

关键词： Planet imager cryogenic spectrograph test image quality

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Analysis and design of an adaptive lens

Analysis and design of an adaptive lens

引用

conference on current developments in Lens design and optical engineering vii

作者： Santiago-Alvarado, A. Vazquez-Montiel, S. Gonzalez-Garcia, J. Garcia-Luna, V. M. Fernandez-Morena, A. Vera-Diaz, E. UTM Inst Fis & Matemat Huajuapan Leon Oaxaca 6900 Mexico INAOE Inst Opt Puebla Mexico

ISBN: (纸本)0819463671

This study presents the design and analysis of a lens with a variable focal length, which we will call an adaptive lens. This lens is formed of two transparent elastic surfaces with a transparent liquid medium between them. The mechanical design of the lens considers the variation of liquid pressure between the surfaces. This causes changes in curvature radii and in the axial thickness, generating variations in the focal length of the lens. An analysis is given of changes in lens power with respect to changes in pressure. Finally, a model of the human eye is presented using this adaptive lens as crystalline.

关键词： adaptive elastic surfaces liquid lens model human eyes

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A hardware-based simulation platform for optical design and engineering

A hardware-based simulation platform for optical design and ...

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conference on current developments in Lens design and optical engineering vii

作者： Ortiz, Fernando E. Durbano, James P. Sharkawy, Ahmed S. Shi, Shouyuan Curt, Petersen F. EM Photon 51 E Main StSuite 203 Newark DE 19711 USA

ISBN: (纸本)0819463671

optical lenses and systems have historically been of interest to the design and simulation community due to their extensive use in a variety of applications, including telecommunications and imaging. To simulate these systems, it is often possible to take advantage of symmetry or apply physical approximations, such as ray tracing and/or beam propagation, in order to avoid a rigorous solution of Maxwell's equations. However, in cases where these techniques are not applicable, such as when feature sizes become comparable to the wavelength of interest, full-wave electromagnetic simulations are required. Unfortunately, the time constraints and simulation sizes associated with many designs render this analysis infeasible or impractical, a problem that is aggravated by iterative design flows. Hence, a numerical platform capable of handling such computationally intense problems is necessary. In this paper, we present a hardware-based, full-wave simulation platform and demonstrate the advantages of hardware acceleration for the simulation of optical applications. Specifically, we will present a diffractive optical element (DOE) lens simulation, comparing results with previously published analytic and experimental data. We then modify the basic lens arrangement to produce an optical beam splitter. Because such a device cannot be analytically described using symmetry, this example will demonstrate the unique advantages of powerful hardware solvers for the analysis of DOE applications. Finally, we discuss how hardware-based solvers are critical for iterative designs by means of a 1-to-3 beam splitter example. This simulation system represents a new era in optical engineering, enabling the design of next-generation devices today.

关键词： optics lens DOE splitter design hardware simulation FDTD FPGA acceleration

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