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Conference on current developments in optical design and optical engineering iv

作者： KASSIM, AM SHEALY, DL AL QUDS UNIV COLL SCI & TECHNOLDEPT PHYSJERUSALEMISRAEL

ISBN: (纸本)0819415871

Using the caustic merit function for plane waves incident upon a singlet lens, a comparison between the optical performance of the lens using an axial gradient index with spherical surfaces or aspheric surfaces with constant index material has been investigated. Results indicate that the use of an inhomogeneous medium for the lens material is more effective in the controlling aberrations than the use of aspheric surfaces for a similar lens.

关键词： GRIN lenses Electronic filtering Aspheric lenses Lenses Ray tracing Geometrical optics Refractive index Spherical lenses Lens design Gradient-index optics

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Use of a new synthesis algorithm to design polarization insensitive optical coatings

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Proceedings of SPIE - The International Society for optical engineering 1994年 2262卷 187-197页

作者： DeBell, Gary W. Tikhonravov, Alexander V. Trubetskov, Michael K. DeBell Design Los Altos CA USA

The design of polarization insensitive optical coatings via use of the needle synthesis algorithm in combination with second order optimization methods is explored. Several designs produced with this technique are pre... 详细信息

ISBN: (纸本)0819415863;9780819415868

关键词： optical coatings

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LENS design USING A MINIMUM NUMBER OF GLASSES 4

LENS DESIGN USING A MINIMUM NUMBER OF GLASSES

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Conference on current developments in optical design and optical engineering iv

作者： ZHANG, SY SHANNON, RR UNIV ARIZONA CTR OPT SCITUCSONAZ 85721

ISBN: (纸本)0819415871

Due to increasing environmental limitations on the use of certain raw materials used to make optical glasses, there is now an economic desire to minimize the number of glasses used in lens design. This paper presents the results of a study to create a suggested universal catalogue that contains the minimum number of glasses needed to satisfy most possible lens designs. A nearly symmetric double Gauss lens is used in the glass selection process. As part of this study, the relationship between the error function and the number of glasses chosen is studied, and in addition, a glass range study is also carried out. Three different lens libraries were studied using the global optimization method and the most frequently chosen glasses were then compiled into the suggested universal glass catalogue. A suggested universal glass catalogue constructed from this study is presented.

关键词： optical GLASS LENS design

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LIMIT TO THE DEGREE OF ASPHERICITY WHEN TESTING WAVE-FRONTS USING DIGITAL INTERFEROMETRY 4

LIMIT TO THE DEGREE OF ASPHERICITY WHEN TESTING WAVE-FRONTS ...

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Conference on current developments in optical design and optical engineering iv

作者： GARCIAMARQUEZ, J MALACARA, D SERVIN, M CTR INVEST OPT AC 37000 LEONMEXICO

ISBN: (纸本)0819415871

When testing an aspheric wavefront with any digital interferogram evaluation method, like phase shifting interferometry, Fourier interferometry, or with a spatial carrier analysis, there is a limit to the maximum degree of asphericity if a null compensator is not used. An analysis of this limitation using different interferogram interpretation methods are described.

关键词： Wavefronts Aspheric lenses Monochromatic aberrations Interferometry Sensors Phase interferometry Fringe analysis Spatial frequencies Phase shifting optical spheres

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WAVE-FRONT ESTIMATE FROM WAVE-FRONT SLOPE MEASUREMENT BY COMPARING THEIR ZERNIKE POLYNOMIALS FITTING COEFFICIENTS 4

WAVE-FRONT ESTIMATE FROM WAVE-FRONT SLOPE MEASUREMENT BY COM...

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Conference on current developments in optical design and optical engineering iv

作者： SHEN, W CHANG, MW WAN, DS NATL CENT UNIV INST OPT SCICHUNGLI 32054TAIWAN

ISBN: (纸本)0819415871

In this paper, a new method used to calculate the Zernike coefficients of wave aberration from ray aberration and from finite shearing of wavefront is proposed. The simulated results are compared with the least squares fitting method, and indicate that the Zernike coefficients of wave aberration can be calculated as accurately with the new method as with the least squares fitting method, but with less computation and operation.

关键词： optical TESTING INTERFEROMETRY POLYNOMIALS

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BUCHDAHL DISPERSION MODEL FOR GRADIENT-INDEX GLASS FAMILIES 4

BUCHDAHL DISPERSION MODEL FOR GRADIENT-INDEX GLASS FAMILIES

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Conference on current developments in optical design and optical engineering iv

作者： MANHART, PK PAGANO, RJ LIGHTPATH TECHNOL INC TUCSONAZ 85704

optical elements which are made out of macro gradient refractive material are represented by lines, as opposed to points, on the glass map (nd Vs. vd diagram). Thus, optical designers need account for gradient dispers... 详细信息

ISBN: (纸本)0819415871

optical elements which are made out of macro gradient refractive material are represented by lines, as opposed to points, on the glass map (n_d Vs. v_d diagram). Thus, optical designers need account for gradient dispersion as well as gradient index. A dispersion model for the material must be readily available and optical design programs must be capable of defining and maintaining this relationship before and during optimization, simplifying user input and confining the material to walk a well defined path on the glass map. Thinking in terms of lines on the glass map for arbitrary glass families yields a simple dispersion model based on least squares fitting of Buchdahl coefficients. This paper introduces the concept of glass lines and outlines a technique to construct a dispersion model for any contiguous family of gradient refractive material.

关键词： Glasses optical design Gradient-index optics Diffusion Lead optical components Lead glass Refraction optical properties Optimization (mathematics)

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NONDESTRUCTivE EVALUATION OF AN EPOXY-BASED COATING BY optical INTERFEROMETRY TECHNIQUES 4

NONDESTRUCTIVE EVALUATION OF AN EPOXY-BASED COATING BY OPTIC...

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Conference on current developments in optical design and optical engineering iv

作者： HABIB, K KISR DEPT MAT APPLICATSAFAT 13109KUWAIT

ISBN: (纸本)0819415871

A fundamental study on evaluating an epoxy-based coating was conducted. The study aimed to determined the performance of the coating on a low carbon steel as a result of chemical contaminations. Coated samples were tested in a local tap water by using the method of real time— holographic interferometry. A mathematical model was used along the obtained experimental data. The model described processes of detecting the early corrosion of the the steel under the coatings by holographic interferometry. Consequently, the holographic interferonxetry technique was found very useful in detecting the early corrrosion processes of the coated steel Also, a relationship between the displacement of the coating ,dueto metal corrosion under the coating, and corrosion current density of the coated steel was established for the epoxy-based coating with and without an addition of sodium chloride to the coating.

关键词： Coating Corrosion Holographic interferometry Metals Mathematical modeling Holography Nondestructive evaluation optical interferometry Carbon Photography

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A METHOD TO ANALYZE optical WAVE-GUIDES WITH ARBITRARY INDEX PROFILES 4

A METHOD TO ANALYZE OPTICAL WAVE-GUIDES WITH ARBITRARY INDEX...

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Conference on current developments in optical design and optical engineering iv

作者： PALACIOS, SL CRESPO, RD RODRIGUEZ, J FERNANDEZ, S VIRGOS, JM FERNANDEZ, JM GUINEA, A OLivARES, J UNIV OVIEDO DEPT APPL PHYSE-33007 OVIEDOSPAIN

ISBN: (纸本)0819415871

We present a theoretical method which makes it possible to analyze 3-D integrated optical waveguides with arbitrary refractive index profiles. With this method it is easy to obtain effective indexes, propagation constants and coupling/switching properties of planar and channel optical waveguides. This theoretical approach involves modelling the original optical waveguide by means of an Equivalent optical Waveguide whose effective index is evaluated by applying a technique that we call the Asymptotic Effective Index Method. The theoretical results show good convergence and accuracy for effectives indexes, propagation constants and coupling/switching characteristics. © 1994 SPIE. All rights reserved.

关键词： optical waveguides

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Bandpass filters and Fourier transform thin-film design techniques

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Proceedings of SPIE - The International Society for optical engineering 1994年 2262卷 176-186页

作者： Bovard, Bertrand G. Barr Associates Inc. Chelmsford MA USA

The validity of the Fourier transform theory is investigated in the context of bandpass filters.

ISBN: (纸本)0819415863;9780819415868

The validity of the Fourier transform theory is investigated in the context of bandpass filters.

关键词： Bandpass filters

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Location of mechanical features in lens mounts 4

Location of mechanical features in lens mounts

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current developments in optical design and optical engineering iv 1994

作者： Yoder, Paul R. Consultant in Optical Engineering 1220 Foxboro Drive NorwalkCT06851 United States

design of mechanical features such as spacers, retainers and/or cell shoulders used to locate and constrain lens components within a mount entails application of geometric relationships that depend upon the types of glass-to-metal interfaces to be provided. This paper describes the pertinent geometry of the most common surface-contact interface types ("sharp corner", spherical, tangential and toroidal) and gives equations for locating key features of the mechanical parts relative to the associated lens vertices. Examples illustrate the use of these equations to dimension mechanical features in typical lens/mount configurations. © 1994 SPIE. All rights reserved.

关键词： Optomechanics

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