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检索条件"任意字段=8th Conference on Current Developments in Optical Design and Optical Engineering"

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optical coatings for the optical concentrator with the prism film 19

Optical coatings for the optical concentrator with the prism...

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

作者： Jaing, Cheng-Chung Wan, Wei-Li Yang, Pao-Keng Ying, Shang-Ping Chen, Bing-Mau Minghsin Univ Sci & Technol Dept Optoelect Syst Engn 1 Xinxing Rd Hsinchu 30401 Taiwan

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

Effects of a coating combination, a prism film and a phosphor layer on the short current of the solar cell in the optical solar concentrator and the illuminance of the sunlight passing through the samples were investigated. the optical solar concentrator was a 50 mm x 50 mm x 5 mm B270 thick glass with its sides connected by a solar cell. the prismatic structure of the prism film had a period of 50 mu m. A phosphor Y560 having an absorption band of 390 nm to 500 nm and emitting from 490 nm to 700 nm was prepared. Six coating combinations applied in this study were composed of optical filters and glass. the optical filters included infrared cut-off, magenta, red, green and blue filters. the deflection angle was between 31 and 33 degrees when the incident sunlight passed through the prism film. the short current of the solar cell in the optical solar concentrator with the prism film, the coating combination and the phosphor layer was largest in this study. Experimental results show that the coating is more suitable for enhancing the short current than the phosphor layer in the optical solar concentrator with the prism film. And the phosphor layer can increase the illuminance of the sunlight passing through the samples due to the human eye sensitivity.

关键词： optical concentrator coating prism film phosphor layer short current illuminance optical filter solar cell

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design of an F/1.0 spectrograph camera: 'Surfing' the 15 dimensional design space of 1 million optical systems 6

Design of an F/1.0 spectrograph camera: 'Surfing' the 15 dim...

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current developments in optical design and engineering VI conference

作者： Radley, A Univ. College London (United Kingdom)

ISBN: (纸本)0819422517

this paper describes a real time optimization method for optical systems. We examine the features of the Global-Opt optical ray tracing program, which has been developed to provide the optical engineer with interactive optimization capabilities. We illustrate the programs main features through the results of design study into a an F/1.0 camera for use in a planned Astronomical spectrograph this instrument is the High Resolution optical Spectrograph (HROS), which is part of the international Gemini project to build twin 8m aperture telescopes towards the end of the decade. the Global-Opt program allows the optical engineer to ray trace, in batch mode, up to 1 million optical systems over a period of several hours. Once complete, the engineer can explore the properties (i.e. aberrations) of these million systems in real time in order to locate the most suitable one for a particular task this is achieved by transferring the multi-dimensional optimization problem into 3 spatial dimensions in which all the aberrations and variable parameters are represented in a 'landscape' visualization. the user is then able to interact with these moving visualizations in order to attempt system optimization. Animation of these visualizations helps the user identify any features present, which directly represent specific attributes of the design form under investigation. We have noted that these moving features resemble water waves, hence the interactive optimization process described here is made analogous to 'surfing'.

关键词： raytracing optimization aberration spectrograph camera interactive virtual reality

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the impact of zonal irregularity on infrared lens performance 6

The impact of zonal irregularity on infrared lens performanc...

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current developments in optical design and engineering VI conference

作者： Sinclair, RL Wescam Inc 45 Innovation Drive Flamborough L9H 7L8 ON Canada

ISBN: (纸本)0819422517

High performance infrared optical designs require careful tolerancing to ensure that the as built performance meets the system requirements. Using modem optical design programs a wide variety of single element and group tolerances can be defined and statistical analysis employed to formulate a prediction of the as built performance. When the number of units being produced is small or near diffraction limited performance is required, then a worst case analysis is often employed to generate a more accurate prediction. However, in some situations, such as low F/number lenses, certain effects that may be important are not always adequately addressed by first order tolerance analysis. this paper reviews one such effect;zonal irregularity or slope errors. To quantify the impact of zonal irregularity on the MTF performance of an infrared lens, detailed comparisons are made between measured and predicted performance. Interferometric analysis of the lens element irregularity is incorporated within the design to predict the as built lens line spread function.

关键词： infrared lens optical tolerances interferograms

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Modeling of polychromatic MTF losses due to secondary effects in diffractive lenses

Modeling of polychromatic MTF losses due to secondary effect...

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conference on current developments in Lens design and optical engineering VIII

作者： thorpe, Michael D. Jonas, Reginald P. Szapiel, Stanislaw ELCAN Opt Technol 450 Leitz Rd Midland ON L4R 5B8 Canada

ISBN: (纸本)9780819468154

Although hybrid (i.e. refractive-diffractive) surfaces are in common use in optical design there are several phenomena which affect design MTF that are not routinely modeled in current commercial versions of optical desig,n software. Typically the details of the diffractive structure are not taken into account and rays are traced through the hybrid surface employing a vector grating equation which uses the phase gradient associated with the diffractive definition to calculate a local grating spacing and orientation and from this grating information a 'diffracted ray' angle. this geometrical-optics based procedure has limitations;(I)it considers only the design diffraction order, (2)it does not take into account the sub-aperturing effect whereby color correction is reduced along, with zone count, and (3) the model used does not generate an exact blaze profile. In this paper we discuss progress in application of diffraction-based beam propagation tools in combination with a physical definition of the diffractive structure to more accurately model these secondary effects on design MTF. Results are given for some simple lenses and also the effects to be expected for a more complex zoom lens.

关键词： lens design lenses

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optical PCB using waveguide-embedded backplane

Optical PCB using waveguide-embedded backplane

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conference on current developments in Lens design and optical engineering V

作者： Yoon, KY Cho, IK Ahn, SH Kim, JT Elect & Telecommun Res Inst Taejon 305350 South Korea

ISBN: (纸本)0819454613

A practical optical printed circuit board (PCB) was demonstrated, using a waveguide-embedded optical backplane and processing boards. the polymeric waveguide was produced by means of a hot embossing technique then embedded following a conventional lamination processes. the core size of waveguide was 100 x 60 mum(2) (input section), 60 X 60 mum(2) (output section), and the propagation loss of tapered polymeric waveguide was approximately 0.1 dB/cm at 850 nm. We prepared a optical backplane with polymeric waveguide by using conventional multilayer board lamination processes. the transmission power and dimension of the optical backplane was same as those of waveguide before lamination. A metal optical bench was used as a packaging die for the optical devices and the integrated circuit chips in both the transmitter and the receiver processing boards. We used a 1 x 4 850 nm VCSEL array with 2 dBm of output power for the transmitter and a PIN photodiode array for the receiver. We successfully demonstrated 8 Gb/s of data transmission between the transmitter processing board and the optical backplane board.

关键词： polymeric waveguide hot embossing technique optical backplane optical printed circuit board waveguide-embedded backplane metal optical bench multilayer board lamination board-to-board interconnection

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optical design of a near-infrared birefringent filter system and measurement on birefringence index of calcite

Optical design of a near-infrared birefringent filter system...

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conference on current developments in Lens design and optical Systems engineering

作者： Wang, JS Wang, HM Spirock, TJ Lee, CY Ravindra, NM Ma, J Goode, PR Denker, C New Jersey Inst Technol Dept Appl Phys Newark NJ 07102 USA

ISBN: (纸本)0819437387

In this paper, we present an optical design of a near-infrared (at FeI 15648.5 Angstrom) birefringent filter system which is used to obtain the chromatic images of the sun and measure the solar magnetic field at the Big Bear Solar Observatory (BBSO). this system consists of a prefilter, a liquid crystal analyzer, a wavelength-tunable birefringent filter and a Fabry-Perot Etalon. this system is expected to achieve a clean narrow pass band (1/8 Angstrom). It can also be tuned across the spectral line to obtain line profiles of two-dimensional fields of view. During the design of the tunable near-IR birefringent filter and the test of its components, we found the value of birefringence index mu (n(e) - n(o)) of calcite at spectral range near 15648.5 Angstrom is very different from the value in literature(1). Because the birefringence index is important for the design of birefringent optical components, the birefringence index of calcite and its thermal coefficient are measured. Some test results of the four pairs of calcite prate used in the birefringent filter are presented.

关键词： near-infrared birefringent filter calcite birefringence index Zeeman effect

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the design of the Prism Film on the optical Concentrator for Photovoltaic Applications 19

The Design of the Prism Film on the Optical Concentrator for...

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

作者： Ying, Shang-Ping Chen, Bing-Mau Yang, Pao-Keng Jaing, Cheng-Chung Minghsin Univ Sci & Technol Dept Optoelect Syst Engn 1 Xinxing Rd Hsinchu 30401 Taiwan

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

As an application of the PV technology, building integrated photovoltaic (BIPV) technologies have attracted an increasing interest in the past decade. One of these BIPV elements is the luminescent solar concentrators (LSCs). the LSC consists of a transparent plate embedded with luminescent dyes or inorganic particles, and the solar cells are attached on one or more sides. the incoming sunlight absorbed by the luminescent dyes or inorganic particles re-emits at a longer wavelength, and part of the re-emitting light trapped in the transparent plate reaches the PV cell attached on the LSC and convert it to electricity. However, the efficiency of the LSCs is still low at this stage. the surface loss on the top surface of the transparent plate is one of the main losses in LSCs. the prism film in liquid-crystal display (LCD) module is used to collimate the light in the module and enhance the overall brightness, and would be used in the LSCs to enhance the incoming sunlight to the solar cells attached on the end of the transparent plate. then the design of the prism film is important. In this study, the ray-tracing simulation is used to investigate the optical characteristics of the LSC with the prism film covered on the top surface of the transparent plate. Different structure of the prism film will be considered to enhance the light reaches the PV cell attached on the LSC.

关键词： Prism film optical design optical Concentrator

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Fast robust non-sequential optical ray-tracing with implicit algebraic surfaces 16

Fast robust non-sequential optical ray-tracing with implicit...

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conference on current developments in Lens design and optical engineering XVI

作者： Greynolds, Alan W. 10741 E Placita Metate Tucson AZ 85749 USA

ISBN: (纸本)9781628417449

the fastest, most robust, general technique for non-sequentially ray-tracing a large class of imaging and non-imaging optical systems is by geometric modeling with algebraic (i.e. polynomial) implicit surfaces. the basic theory of these surfaces with special attention to optimizing their precise intersection with a ray (even at grazing incidence) is outlined for an admittedly limited software implementation. On a couple of "tame" examples, a 64-bit Windows 7 version is significantly faster than the fastest commercial design software (all multi-threaded). Non-sequential ray-surface interactions approaching 30M/sec are achieved on a 12-core 2.67 GHz Mac Pro desktop computer. For a more exotic example of a 6th degree Wood's horn beam dump (light trap), a 32-bit Windows single thread version traces rays nearly 4 times faster than the commercial ASAP software's implicit algebraic surface and over 13 times faster than its equivalent NURBS surface. However, implicit surfaces are foreign to most CAD systems and thus unfortunately, don't easily fit into a modern workflow.

关键词： Ray tracing software surface modeling

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Caustic surfaces produced by a plane wavefront refracted through cemented doublet lenses 19

Caustic surfaces produced by a plane wavefront refracted thr...

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

作者： Avendano-Alejo, Maximino Carmen Lopez-Bautista, M. Castaneda, Luis Univ Nacl Autonoma Mexico Inst Ciencias Aplicadas & Tecnol Apdo Postal 70-186 Mexico City 04510 DF Mexico Inst Politecn Nacl Escuela Super Med Plan San Luis & Diaz Mirson S-N Mexico City 11340 DF Mexico

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

We study the formation of caustic surfaces produced by cemented doublet lenses, considering a plane wavefront propagating parallel to the optical axis and neglecting the refractive index of the optical cement between two simple lenses which are in contact. 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 design for two conic lenses in contact, in such a way that if we are able to vanish the caustic, the optical system produces either an image without spherical aberration or longitudinal chromatic aberration reduced, commonly known as spherochromatism. 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 two simple lenses. We provide an analytic equation for the caustic surfaces in a meridional plane and an example is presented.

关键词： Caustic Surfaces Cemented doublet lenses optical design Principal Surfaces

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Using effective medium theories to design tailored nanocomposite materials for optical systems 19

Using effective medium theories to design tailored nanocompo...

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

作者： Werdehausen, Daniel Staude, Isabelle Burger, Sven Petschulat, Joerg Scharf, Toralf Pertsch, thomas Decker, Manuel Carl Zeiss Corp Res & Technol Carl Zeiss Promenade 10 D-07745 Jena Germany Friedrich Schiller Univ Jena Abbe Ctr Photon Inst Appl Phys Albert Einstein Str 15 D-07745 Jena Germany Ecole Polytech Fed Lausanne Nanophoton & Metrol Lab CH-1015 Lausanne Switzerland JCMwave GmbH Bolivaralle 22 D-14050 Berlin Germany Zuse Inst Berlin Takustr 7 D-14195 Berlin Germany Carl Zeiss SMT GmbH Semicond Mask Solut Carl Zeiss Promenade 10 D-07745 Jena Germany Fraunhofer Inst Appl Opt & Precis Engn Albert Einstein Str 7 D-07745 Jena Germany

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

Modern optical systems are subject to very restrictive performance, size and cost requirements. Especially in portable systems size often is the most important factor, which necessitates elaborate designs to achieve the desired specifications. However, current designs already operate very close to the physical limits and further progress is difficult to achieve by changing only the complexity of the design. Another way of improving the performance is to tailor the optical properties of materials specifically to the application at hand. A class of novel, customizable materials that enables the tailoring of the optical properties, and promises to overcome many of the intrinsic disadvantages of polymers, are nanocomposites. However, despite considerable past research efforts, these types of materials are largely underutilized in optical systems. To shed light into this issue we, in this paper, discuss how nanocomposites can be modeled using effective medium theories. In the second part, we then investigate the fundamental requirements that have to be fulfilled to make nanocomposites suitable for optical applications, and show that it is indeed possible to fabricate such a material using existing methods. Furthermore, we show how nanocomposites can be used to tailor the refractive index and dispersion properties towards specific applications.

关键词： Nanocomposites Nanomaterials optical materials optical design optical Systems Dispersion engineering Effective medium theory Mie theory

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