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Conference on current developments in Lens design and optical engineering XIV

作者： Sasian, Jose Univ Arizona Coll Opt Sci Tucson AZ 85721 USA

This paper provides a set of polarization aberration fields that are useful for understanding polarization aberrations in optical imaging systems. The aberration function of a plane symmetric system is used to build t... 详细信息

ISBN: (纸本)9780819496911

关键词： polarization aberrations optical imaging systems

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Making the Mid-IR nano with epitaxial plasmonic devices

Making the Mid-IR nano with epitaxial plasmonic devices

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Device Research Conference

作者： S. Law C. Roberts S. Inampudi W. Streyer A. Rosenberg V. Podolskiy D. Wasserman Department of Electrical and Computer Engineering University of Illinois Urbana IL USA Department of Physics and Applied Physics UMass Lowell One University Avenue Lowell MA USA

We have extensively investigated heavily doped semiconductors as potential plasmonic metals at long wavelengths. The ability to control the doping level in a semiconductor material, both iii-V's (InAs/InSb) and Silicon, allows for control of the metal's optical properties, and adds an intriguing additional controllable parameter to the design of plasmonic structures. These materials can be quite accurately modeled using the Drude formalism, even for energies larger than the band gap, and have a number of attractive qualities, including control of carrier concentration (and thus plasma frequency, ωρ), as well as single-crystal material quality, atomic-layer control of thicknesses, and the potential for integration with epitaxially-grown mid-IR optoelectronic devices. In this presentation, I will discuss recent developments in epitaxial plasmonic devices for mid-IR applications. First, the growth and characterization of our materials will be discussed, as well as the material limitations. Subsequently, I will demonstrate the doped semiconductors potential as epsilon-near-zero (ENZ) materials. At ENZ frequencies, we have demonstrated enhanced coupling to sub-wavelength waveguides, offering a potential route towards overcoming the mismatch between the micron-scale light of the mid-IR and the nano-scale. In addition, we have shown that near ENZ, these materials thin (d ≪ λo) loss-less dielectric films to serve as perfect absorbing layers, by controlling the metal/dielectric interface phase shift in thin film interference structures.

关键词： Plasmons Epitaxial growth optical sensors Metals optical films optical materials

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Multiagent System in Automatic Light Power Balance in optical Networks

Multiagent System in Automatic Light Power Balance in Optica...

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Conference on current developments in Lens design and optical engineering XIV

作者： Slapak, Martin Hula, Milislav CESNET Ale Prague 16000 6 Czech Republic

ISBN: (纸本)9780819496911

This article deals with automatic power balancing along an optical line. For optimal transmission of an optical signal it is important to achieve certain parameters such as the signal to noise ratio orchromatic dispersion and also the sufficient output power level of in-line amplifiers. Pump diodes in amplifiers suffer from aging of material and therefore the driving current of pump diodes has to be accordingly increased to achieve the same gain as in the moment when the pump diodes were new. The use of a minimal required driving current leads to the longer lifetime of optical pumps. Therefore an automatic power balance is one of the methods used to achieve these goals.

关键词： Multiagent system automatic power balance gain control

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design for adjustable optical system of liquid filled lens

Design for adjustable optical system of liquid filled lens

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Conference on current developments in Lens design and optical engineering XIV

作者： Shaw, Dein Hsieh, Hui-An 101 Sect 2Kuang Fu Rd Hsinchu 30013 Taiwan

ISBN: (纸本)9780819496911

In this research, an optical integrated module including a liquid-filled lens, a flexible sensor membrane and a self-adjusted optical compensation component was designed. We studied the optical relationship (which is called compensation function) between the liquid-filled lens and the sensor membrane to make the system has good optical characters. According to compensation function, this module compensates the optical character between lens and sensor membrane to obtain a clear image by adjusting the internal pressure and volume of the liquid in the liquid filled optical system. For a single lens optical system, the curvy sensor membrane has better performance than flat type sensor in off optical axis due to Petzval surface is curved. An optical experiment was set up to measure the performance of the module to prove the idea, and the results show that the module achieves the desired effect.

关键词： liquid-filled lens flexible sensor membrane optical module self-compensation PDMS

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Analytic formulas of the aspheric terms for convex-plano and plano-convex aspheric lenses

Analytic formulas of the aspheric terms for convex-plano and...

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Conference on current developments in Lens design and optical engineering XIV

作者： Avendano-Alejo, Maximino Univ Nacl Autonoma Mexico Ctr Ciencias Aplicadas & Desarrollo Tecnol Mexico City 04510 DF Mexico

ISBN: (纸本)9780819496911

We provide analytic formulas for fews aspheric terms either plano-convex or convex-plano aspheric lenses. These formulas are obtained considering an expansion in Taylor's series from exact caustic equation produced by aspheric lenses. A comparison between our method and numerical methods of design are presented, showing a well agreement in order to reduce the spherical aberration.

关键词： Aspheric lenses Monochromatic aberrations Refraction Manganese Geometrical optics Lens design Numerical analysis Distortion optical components optical design

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Three dimensional point spread function of a high aperture optical system

Three dimensional point spread function of a high aperture o...

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Conference on current developments in Lens design and optical engineering XIV

作者： Borovytsky, Volodymyr Chorna, Viktoriia Solovei, Alex Nat Techn Univ Ukraine KPI Dept Opt Engn UA-03056 Kiev Ukraine

ISBN: (纸本)9780819496911

The paper presents the mathematical technique for precise calculation of the three dimensional point spread function (3D PSF) of a high aperture optical system. The proposed technique is based on Huygens-Fresnel principle: a spherical wave at an exit pupil is considered as a numerous set of elementary secondary light sources. They emit spherical coherent electro-magnetic waves. All these waves form a definite distribution of summarized complex amplitudes in a three dimensional space near a focal point. This distribution is used for calculation of the distribution of effective intensity which takes into account the influence of inclined optical beams. The comparison analysis of this approach and the techniques based on multi-dimensional Fourier transforms are discussed.

关键词： point spread function optical system pupil function Fourier transform intensity distribution optical microscopy spatial resolution

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Low Cost, Mobile Sensor System for Measurement of Carbon Dioxide in Permafrost Areas

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Procedia engineering 2014年 87卷 1318-1321页

作者： A. Eberhardt L. Scholz S. Westermann T. Sachs M. Langer J. Wöllenstein S. Palzer Departm ent of Microsystem s Engineering University of Freiburg Freiburg Germ any Departm ent of Geosciences University of Oslo Oslo Norway GFZ Germ an Research Centre for Geosciences Potsdam Germ any Alfred Wegener Institute for Polar and Marine Research Potsdam Germ any Fraunhofer Institute for Physical Measurem ent Techniques Freiburg Germ any

In this work a novel concept based on low power semiconducting, mid infrared components and new, low cost measurement cells for use in harsh environmental conditions, such as permafrost areas, is presented. Due to the small changes of the environmen tal carbon dioxide (CO 2 ) concentration in this area a high resolution of 5 ppm CO 2 is required. The current sensor design achieves a resolution of up to 6 ppm CO 2 and offers further optimization potential at overall low costs.

关键词： permafrost low cost mid infrared carbon dioxide optical iii-V semiconductor MIR-LED photoconductor photometer

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The study of optical properties of InGaN-based solar cell with blue emission wavelength

The study of optical properties of InGaN-based solar cell wi...

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2014年光子与光学工程国际会议暨西部光子学学术会议

作者： Jiangteng Wang W.Ding F.Yun Q.Li D.Xia S.Wang L.Feng Y.Zhang M.Guo S.Liu Z.Gong Solid-State Lighting Engineering Research Center Xi'an Jiaotong University(China) Xi'an Jiaotong University(China) Solid-State Lighting Engineering Research Center Xi’an Jiaotong University(China)

The iii-N material system(including alloys of InN,AlN,and Ga N) has several characteristics which give it key advantages over the existing solar cell materials,for example,the high absorption coefficient and high carrier mobility,more important,the wide range of band gap energies which spans nearly the entire solar *** this paper,we fabricated a multiple quantum well(MQW) InG aN /GaN solar *** photovoltaic characteristics of the device was demonstrated that,the short circuit current density(JSC) is about 0.43 mA /cm2,the open circuit voltage is about 2.2 e V,and the fill factor is about 81%.But the peak external quantum efficiency(EQE) is not very high,only 30%.And the conversion efficiency is about 0.83%,so more work for device design should be done in the future.

关键词： InG aN /GaN solar cell,MQW structure,band gap,conversion efficiency

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A study of optical design of zoom optics

A study of optical design of zoom optics

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Conference on current developments in Lens design and optical engineering XIV

作者： Tsai, Cheng-Mu Yen, Chih-Ta Fang, Yi-Chin Chen, Chia-An Natl Kaohsiung First Univ Sci & Technol Coll Engn Dept Mech & Automat Engn 2 Jhuoyue Rd Kaohsiung 811 Taiwan Kun Shan Univ Dept Comp & Commun Tainan 710 Taiwan Natl Formosa Univ Dept Elect Engn Huwei Township 632 Yunlin Taiwan

ISBN: (纸本)9780819496911

This paper proposes a new zoom lens design with intermediate image. The two 3x zoom lenses are independently designed and then cascaded to a 9x zoom lens. The concept of intermediate optics is applied in this paper in order to minimize size of front diameter and overall length. The final layout shows the proposed 9x zoom lens can effectively miniature the front diameter of lens about 44.25%.

关键词： intermediate optics zoom lens optical system design

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Theoretical considerations in radiometer design

Theoretical considerations in radiometer design

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Conference on current developments in Lens design and optical engineering XIV

作者： Suarez-Romero, Jose G. Salas-Zuniga, Roberto Inst Tecnol Queretaro Av Tecnol SN Esc Escobedo Queretaro 76000 Qro Mexico Ctr Ingn & Tecnol SC Queretaro 76090 Qro Mexico

ISBN: (纸本)9780819496911

This work considers typical radiometers that measure the radiance of sources or of some surface (due to reflection). The most important thing in a radiometer is its optical cavity, which defines the solid angle of measurement. In case of instruments that use lenses, lens diameter and focal length define the solid angle. Radiometer design takes care that the solid angle subtended by the optical cavity be minor that the solid angle subtended by the source to be measured, however no considerations are taken on the length of the cavity. In this work it is discussed theoretical limitation in the design of radiometers, particularly the influence of radiometer length (the cavity length). Theory of partial coherence is used to obtain the instrument function and to show how the length of the instrument affects measurements.

关键词： Radiometers photometers partial coherence diffraction effects radiometry photometry

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