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

共 530 条记录，以下是131-140 订阅

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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

引用

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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Caustic surface produced by a plane wavefront refracted through positive bi-conic lenses. 17

Caustic surface produced by a plane wavefront refracted thro...

引用

conference on current developments in lens design and optical engineering XVII

作者： Ponce-Hernandez, Osvaldo Avendano-Alejo, Maximino Roman-Hernandez, Edwin Moreno-Oliva, Ivan Univ Nacl Autonoma Mexico Ctr Ciencias Aplicadas & Desarrollo Tecnol Apdo Postal 70-186 Mexico City 04510 DF Mexico Univ Istmo Div Estudios Posgrado Campus Tehuantepec Cd Univ S-N Santo Domingo Tehuantepe 70760 Oaxaca Mexico

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

We study the formation of caustic surfaces produced by bi-conic lenses, considering a plane wavefront propagating parallel to the optical axis. We have already seen that the shape of caustic surfaces 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 we are able to vanish the caustic, the optical system produces an image without spherical aberration, alternatively caustic surfaces having a large area could be applied to design non-imaging optical systems, such as diffusers of light. The shape of the caustic surface is a function of the indices of refraction involved in the process of refraction, and all the parameters of the bi-conic lens. We provide an analytic equation for the caustic surface in a meridional plane and some examples are presented.

关键词： Ray tracing lenses Protactinium Refraction Wavefronts Geometrical optics Interfaces Monochromatic aberrations optical design Cadmium

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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...

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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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Formation of the color image based on the vidicon TV camera 17

Formation of the color image based on the vidicon TV camera

引用

conference on current developments in lens design and optical engineering XVII

作者： Iureva, Radda A. Maltseva, Nadezhda K. Dunaev, Vadim I. ITMO Univ St Petersburg Russia

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

The main goal of nuclear safety is to protect from accidents in nuclear power plant (NPP) against radiation arising during normal operation of nuclear installations, or as a result of accidents on them. The most important task in any activities aimed at the maintenance of NPP is a constant maintenance of the desired level of security and reliability. The periodic non-destructive testing during operation provides the most relevant criteria for the integrity of the components of the primary circuit pressure. The objective of this study is to develop a system for forming a color image on the television camera on vidicon which is used to conduct non-destructive testing in conditions of increased radiation at NPPs.

关键词： Cameras Cameras Light emitting diodes Televisions Light sources and illumination Glasses Nondestructive evaluation Control systems Imaging systems Radiation effects Safety

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Achrotech: achromat cost versus performance for conventional, diffractive and GRIN components 17

Achrotech: achromat cost versus performance for conventional...

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conference on current developments in lens design and optical engineering XVII

作者： Morris, Jeffrey Wolf, Greg Vandendriessche, Stefaan Sparrold, Scott Edmund Opt 6464 E Grant Rd Tucson AZ 85711 USA Edmund Opt 101 East Gloucester Pike Barrington NJ 08007 USA

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

An achromatic component shares a common focus at two wavelengths and is a commonly used device in optical assemblies. This work explores the cost versus performance tradeoff for several types of achromatic lenses: conventional doublets with homogenous glass elements, hybrid doublets with a diffractive surface, axial GRadient INdex (GRIN) lenses (where the index of refraction changes along the length of the lens), and radial GRIN lenses (where the index of refraction changes depending on radial position). First order achromatic principles will be reviewed and applied to each system as a starting point and refined through the use of ray trace software. optical performance will be assessed in terms of focusing efficiency and imaging. Cost will then be evaluated by accounting for current manufacturing costs and retail price through several distributors.

关键词： achromat GRIN lens diffractive lens axial color longitudinal color spherochromatism lens design

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Retina projection using curved lens arrays 17

Retina projection using curved lens arrays

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conference on current developments in lens design and optical engineering XVII

作者： Yen, Hao-Ren Su, Guo-Dung J. Natl Taiwan Univ Grad Inst Photon & Optoelect 1 Roosevelt RdSect 4 Taipei Taiwan

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

In this paper, we propose a multi-channel imaging system which combines the principles of an insect's compound eye and optical cluster eye. The system consists of two curved structure lens arrays with different pitches. Both of them have the same curvature and the radiuses of the lenses in the arrays are optimized to focus rays on the retina. The optical axes of different channels are tilted to each other in order to reduce the optical system volume and transmit a wide field of view. Each channel of an array of multiple optical system transfers only a part of the field of view. Each partial image passes through each channel and stitches together on the retina to reconstruct a complete image. In order to simulate the image stitching, we also build an eye model. The thickness from the panel to the last surface of lens group is less than 25mm. The panel size is designed to be 4 inch which is the scale of eyeglass. The system can provide a large field of view about 150 degrees which is much wider than the commercial products. By using the 3D printer, we can make a model of lens array to achieve our design.

关键词： head-mounted display lens arrays

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optical design of an ultrashort throw ratio projector with two freeform mirrors 17

Optical design of an ultrashort throw ratio projector with t...

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conference on current developments in lens design and optical engineering XVII

作者： Nie, Yunfeng Mohedano, Ruben Benitez, Pablo Chaves, Julio Minano, Juan C. Thienpont, Hugo Duerr, Fabian Vrije Univ Brussel Dept Appl Phys & Photon Brussels Photon Team Pleinlaan 2 B-1050 Brussels Belgium Light Prescript Innovators Madrid 28223 Spain Light Prescript Innovators Altadena CA 91001 USA Univ Politecn Madrid CeDint Campus Montegancedo Pozuelo Madrid 28223 Spain

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

In this work, an optical design approach is presented to design an ultrashort throw distance projection system by combination of an off-the-shelf refractive lens and two off-axis freeform mirrors. These two freeform mirrors are used to greatly shorten the projection distance by more than three times compared to conventional (rotationally symmetric) systems, while still maintaining a good imaging quality. Firstly, a direct design method that enables the simultaneous calculation of two off-axis freeform-profile mirrors by partially coupling more than three fields is introduced. The specifications of the conventional refractive lens are taken into account during this procedure. The pupil matching principle is applied to ensure good performance between the two sub-systems. The calculated mirrors then serve as a good starting point for optimization using commercial optical design software. To step from freeform profiles to freeform surfaces, the calculated two profiles are fitted into odd polynomials to evaluate the image quality and then re-fitted into XY polynomials for further optimization. Finally, the polynomial coefficients of the two freeform mirrors are imported into the optical design program. The merit function is built from RMS spot radii over the full field, and additional constraints are made for correcting distortion. After optimization, the calculated initial design quickly converges to a well performing imaging system. As an example, an ultrashort throw distance projection lens with a large 80-inch diagonal image at 400mm throw distance is designed, analyzed and compared with literature data. The values of MTF are over 0.6 at 0.5 lp/mm and the distortion is less than 1.5%: showing a very good and well balanced imaging performance over the entire field of view.

关键词： geometric optics ultrashort throw ratio projector optical design aspheric mirrors freeform optics

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Characterization of a tunable liquid-filled lens with minimum spherical aberration 17

Characterization of a tunable liquid-filled lens with minimu...

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conference on current developments in lens design and optical engineering XVII

作者： Diaz-Gonzalez, G. Santiago-Alvarado, A. Munoz-Lopez, J. Juarez-Salazar, R. Cruz-Felix, A. S. Jimenez-Barriga, N. Univ Tecnol Mixteca Carretera Acatlima Km 2-5 Mexico City 69000 DF Mexico Inst Nacl Astrofis Optic Elect Luis Enrique Erro 1 Puebla 72840 Mexico Inst Politecn Nacl CONACYT CITEDI Ave Inst Politecn Nacl 1310 Tijuana 22435 BC Mexico

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

Tunable lenses have become very popular elements due their capacity of change their focal length by only modifying their shape. This characteristic is very useful in different applications in the field of optics. The development of tunable lenses consists on several phases: first, to find a suitable material, second, to obtain an optimal analysis and design, and third, to find the way to change the lens shape and characterization. In this work we present the characterization of a tunable lens, formed by spherical profiled elastic membranes and a liquid medium between them. The proposed liquid-filled tunable has a design such that the spherical aberration is the least to different focus. The development of an optomechanical system to change the lens shape is presented.

关键词： Tunable lens liquid filled lens opto-mechanical design

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design investigation of a cost-effective dual-band (MWIR/LWIR) and a wide band optically athermalized application 17

Design investigation of a cost-effective dual-band (MWIR/LWI...

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conference on current developments in lens design and optical engineering XVII

作者： Ding, Fujian Washer, Joe Morgen, Daniel ISP OPT 50 S Buckhout St Irvington NY 10533 USA

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

Dual-band and wide-band lenses covering both the MWIR and LWIR spectral bands are increasingly needed as dual-band MWIR/LWIR detectors have become prevalent and broadband applications have expanded. currently in dual-band /wide-band applications, the use of more than three elements per lens group and the use of chalcogenide glass is common. This results in expensive systems. Also, many chalcogenides are available only in small diameters, which is a problem for large aperture broadband lenses. In this paper an investigation of cost-effective designs for dual-band MWIR/LWIR lens using only widely available IR materials, specifically Ge, ZnSe and ZnS were performed. An athermalized dual-band MWIR/LWIR using these three materials is presented. The performance analysis of this lens shows that this design form with these three common IR materials works well in certain applications. The required large size blanks of these materials can be easily obtained. Traditional chromatic aberration correction without diffraction for either wide-band or dual-band application was employed. In addition, the methods of harmonic diffraction for dual-band applications, especially with one narrow band, were used for two different presented designs.

关键词： IR Imaging IR Wide-band lens Dual-band lens Athermalization Chromatic Aberration Correction Harmonic diffraction

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Focusing regions evolution under linear transformations in the boundary condition 17

Focusing regions evolution under linear transformations in t...

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conference on current developments in lens design and optical engineering XVII

作者： Garcia-Guzman, A. De los Santos-Garcia, S. I. Torres, M. A. Munoz, J. Martinez-Niconoff, G. Inst Nacl Astrofis Opt & Elect INAOE Dept Opt Postal 51 & 216 Puebla Mexico

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

The properties of optical surfaces generated by diffraction are studied analyzing the changes in the curvature function of the boundary condition. The study leads to establish a classification for the optical fields as elliptical, hyperbolical or parabolic. The elliptical regions are separated from hyperbolic regions by a region of parabolic type, which corresponds to optical focusing regions. The main result of the analysis leads us to describe and to control bifurcations and vortices effects allowing to geometrize and to control the topological properties of the optical field. For this feature is important to control the geometry of the parabolic region, obtained by controlling the curvature function in the boundary condition. The model is implemented experimentally applying a linear transformation in transmittances of zone plate type. The experimental results corroborate the theoretical predictions

关键词： Diffraction Zone plates Lead optical components Transmittance Fractal analysis optical design optical tweezers Particles Spectroscopy

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