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

共 444 条记录，以下是141-150 订阅

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Dynamic modeling of optical systems in order to study vibration effect on performance

Dynamic modeling of optical systems in order to study vibrat...

引用

conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Avsar, Ahmet Levent Ozguven, H. Nevzat ASELSAN Inc MGEO Headship PK 30 TR-06011 Ankara Turkey Middle E Tech Univ Dept Engn Mech TR-06531 Ankara Turkey

ISBN: (纸本)9780819482822

In order to determine the vibration effects on performance in optical system, a simple vibratory model is proposed. The model suggested is compared with FE model. Both models are validated by modal tests for an existing simple optical system. The material properties of adhesive, which play an imported role in the vibratory model of an optical system, are found experimentally by using a simple test setup. The model suggested is used to investigate the dynamic behavior of the optical system under random vibration load conditions. It is concluded in this study that the analytical model suggested can successfully be used in preliminary design stage of simple optical systems when optical housing and lens behave rigidly in the frequency range of interest.

关键词： Dynamic Analysis optical Performance optical System

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F-sin(theta) lens system and applications

F-sin(theta) lens system and applications

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conference on current developments in lens design and optical engineering II

作者： Thibault, S INO Opt Engn Div St Foy PQ G1P 4S4 Canada

ISBN: (纸本)0819441554

Introducing the desired amount of distortion in an optical system is possible and relatively straight forward for optical designer. Known f-theta lenses used in laser scanner system is one of the most popular lenses of this type. With the development of DWDM system, compact spectrometer and various grating based devices, the interest in solving optical problems with innovative optical design has been a revival. On the other hand, it is possible to simplify considerably the task of the software by designing more sophisticated optical element. The F-sin(theta) lens is such a device which can be used in various grating based devices to improve the performance. This optical device is intended to provide a new lens or lens group which can be used with a diffraction grating to provide a linear output plane with the wavelength (lambda), but also with the order of diffraction (m), or with the grating spatial frequency, or with the inverse of the index of refraction (l/n). Based on theoretical consideration, we calculated which amount of distortion is desired to get linear output plane for a grating based device. We present singlet. achromatic doublet and mirror having this characteristic. These F-sin(theta) lenses present satisfactory distortion charateristic and have an improved correction for the curvature of image plane. F-sin(theta) lens will be also name F-lambda lens.

关键词： WDM DWDM distortion optical design aberration grating spectrometer

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design and Prototyping of a Freeform Light-Guide for Automotive Lighting 19

Design and Prototyping of a Freeform Light-Guide for Automot...

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19th conference on current developments in lens design and optical engineering

作者： Brand, Audrey C. Alisafaee, Hossein Rose Hulman Inst Technol Dept Phys & Opt Engn 5500 Wabash Ave Terre Haute IN 47803 USA

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

We have designed a light-guide for lighting applications, including automotive headlamps. The light-guide is designed based on a free-form slab. Our intention has been to optimize the design for creating legal patterns. One of our objectives has been to investigate how the changes in the shape of the freeform light-guide affects the light pattern, and how the light source geometry affects the design. For prototyping purpose, we use a particular polymer that exhibits optical performance close to acrylic (PMMA).

关键词： Automotive Lighting Lighting Light-guide optical design Illumination

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Precise algebraic method to solve the noncemented two-lens objective free from the aperture aberrations

Precise algebraic method to solve the noncemented two-lens o...

引用

8th conference on current developments in optical design and optical engineering

作者： Kryszczynski, T Inst Appl Opt Det Geometr Opt PL-03805 Warsaw Poland

ISBN: (纸本)0819432652

An original method to enable the exact solution for the noncemented two-lens objective by means of any number of simultaneous non-linear equations is described. The method is limited to spherical surfaces without decentrations. Separations and refractive indices of glasses are fixed. Ail curvatures of surfaces are indirectly determined in the final stage. The typical meridional aperture aberrations deal with aplanatic and achromatic conditions. Essence of the method relies on formulation functions which contain trigonometric expressions and are nested up to certain depth. The method uses the advanced professional mathematical software which is indispensable for serving the non-linear system of equations. Numerical examples confirm the helpfulness of the method.

关键词： algebraic methods of the optical design use of computer algebra to the optical design

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optical design of triple-mode seeker 11

Optical design of triple-mode seeker

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conference on current developments in lens design and optical engineering XXI

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

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

In missile applications, new counter measure methods are getting more complex. To discriminate and detect counter measure and to understand target signature from scene is getting harder. Because of all that concerns, using triple-mode seeker for a system solution is a good solution for system total performance. By this way, tri-different wavelength could be used for same system and same scene. In this study, triple mode system's optical designs have been made for mid-wave infra-red imaging, long-wave infra-red imaging and short-wave infrared imaging. optical designs performances have been illustrated in simulation results. Finally, conceptual design of triple mode seeker will be summarized.

关键词： Triple mode seeker mid wave infrared long wave infrared short wave infrared optical design

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design and fabrication of low-cost thermal imaging optics using precision chalcogenide glass molding

Design and fabrication of low-cost thermal imaging optics us...

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conference on current developments in lens design and optical engineering IX

作者： Curatu, George LightPath Technol Orlando FL 32826 USA

ISBN: (纸本)9780819472809

Aspheric and diffractive surfaces in infrared materials are traditionally fabricated by single point diamond turning, which is a high-cost, low-throughput process, not suitable for low-cost, high-volume applications. Precision molding of chalcogenide glasses is a novel process we developed to allow the efficient fabrication of quality infrared optics in large volumes. In this paper we present the advantages and particularities of designing thermal imaging lenses for high-volume applications using precision molded chalcogenide glasses. As an example, we present a compact 19 mm F/1.1 infrared lens design for a 320 x 240 uncooled detector array operating from 8 to 14 microns. The excellent image quality and transmission of tested prototypes prove that precision molding of chalcogenide glasses is an ideal optical fabrication technology for the high-volume production of infrared optics.

关键词： infrared lens design thermal imaging precision glass molding chalcogenide glasses athermal design diffractive optics

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design of an adaptive Fresnel lens using design thinking methodology and cost analysis 19

Design of an adaptive Fresnel lens using design thinking met...

引用

19th conference on current developments in lens design and optical engineering

作者： Santiago Alvarado, Agustin Cruz Felix, Angel S. Santiago Gomez, Stephanie L. Ruiz Zavala, Soledad Osorio Garcia, Adelita Iturbide Jimenez, Fernando Univ Tecnol Mixteca Carretera Acatlima Km 2-5 Huajuapan De Leon 69000 Oaxaca Mexico

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

The main characteristic of adaptive lenses is to change their shape, and consequently their focal length, by modifying their physical parameters. On the other hand, Fresnel lenses have such features as large aperture, short focal length, they are slim and reduced in size. These kind of lenses have become very popular due to their applications, such as in compound eyes, optical communication systems, photolithography, imaging systems, etc. Nowadays, several kinds of tunable lenses exist such as those made with dielectric materials, lenses that change their focal length by varying the refractive index of the material, liquid lenses composed by elastic membranes and solid elastic lenses. In this work, we present the design, simulation of the mechanical behavior using Finite Element Method (FEM) and cost analysis of an Adaptive Fresnel lens made of an elastic material, together with a mechanical mounting system. Our study considered the use of design thinking methodology to obtain the best optical design at minimal cost. Analysis, results and future applications are presented.

关键词： Adaptive Fresnel lens design Thinking optical design

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current status and future direction of sensors in earth observing satellites

Current status and future direction of sensors in earth obse...

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conference on current developments in lens design and optical engineering IV

作者： Zhou, GQ Wang, C Old Dominion Univ Norfolk VA 23529 USA

ISBN: (纸本)0819450464

With the increasing sensor development, smart sensor, advanced sensor, and intelligent sensor, especially, distributed sensors, sensor network and sensor integration are being taken into account for application of our environmental monitoring and Earth source investigation. This paper investigates the development of sensors in Earth observing (EO) satellites, analyzes the current high-resolution EO satellites and presents the direction of new imaging systems in future Earth observing satellite. The purpose of this paper is to contribute to those who are interested in knowing and keeping track of the details of the imaging system of earth observing satellites.

关键词： sensor network earth observing satellite future direction advanced sensor smart sensor

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Introducing a dynamic deep neural network to infer lens design starting points 20

Introducing a dynamic deep neural network to infer lens desi...

引用

conference on current developments in lens design and optical engineering XX

作者： Cote, Geoffroi Lalonde, Jean-Francois Thibault, Simon Univ Laval Ctr Opt Photon & Laser Quebec City PQ G1V 0A6 Canada Univ Laval Lab Vis & Syst Numer Quebec City PQ G1V 0A6 Canada

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

Most lens design problems involve the time-consuming task of finding a proper starting point, that is, a lens design that approximately fulfills the desired first-order specifications while decently correcting aberrations. In recent work, a fully-connected (FC) deep neural network was trained to learn this task by extrapolating from known lens design databases. Here, we introduce a new dynamic neural-network architecture for the starting point problem which is based on a recurrent neural network (RNN) architecture. As we show, the dynamic network can learn to infer good starting points on many lens design structures at once whereas the previous model was limited to a given sequence of glass elements and air gaps. We also show that a pretrained RNN model can generalize its knowledge over new lens design structures for which we have no reference lens design and obtain a significantly better optical performance than a RNN trained from scratch.

关键词： Manuscript format template SPIE Proceedings LaTeX

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Characterization of Feathering of optical Coating

Characterization of Feathering of Optical Coating

引用

conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Buchholz, Chris Krevor, David Rockwell Collins Heads Up Guidance Syst HGS Wilsonville OR 97070 USA

ISBN: (纸本)9780819482822

This paper discusses a method to characterize feathering and determine feathering quality. The characterization is based upon the change of the color coordinate across the transition region. "Feathering" of an optical coating is the gradual taper, without any discernible boundary, from a coated to uncoated region. There can be various reasons why a thin film optical coating may not be applied to the entire surface of a see-through article. Feathering is necessary when the viewer, looking through a transmissive element, is focused on the far-field and would be distracted by a coating boundary which redirects focus to the near field. Done incorrectly, feathering may produce visible artifacts which are ineffective and objectionable to the user. Examples are provided.

关键词： optical coating beamsplitter feather feathering display combiner color coordinate taper

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