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39th International conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)

作者： Llombart, N. Alonso-delPino, M. Lee, C. Chattopadhyay, G. Jung-Kubiak, C. Mehdi, I. Delft Univ Technol Delft Netherlands CALTECH Jet Prop Lab Pasadena CA USA

ISBN: (纸本)9781479938773

This contribution presents the last developments of THz antenna arrays based on silicon micro-machined lenses for heterodyne receivers. The antenna proposed in this manuscript consists of a leaky waveguide feed that illuminates a shallow lens. It achieves high efficiencies and a good coupling to optical systems. Moreover it can be fabricated in parallel using silicon micro-machining techniques, obtaining an array of reduced size and mass to be used for space applications. The current focus of our research is the design of an antenna array operating at 1.9THz based on this antenna for astronomy applications.

关键词： antenna arrays elemental semiconductors heterodyne detection microlenses silicon Si THz integrated heterodyne arrays astronomy applications frequency 1.9 THz leaky waveguide silicon micromachined lens antennas silicon micromachined lenses Antenna arrays Antenna radiation patterns Directive antennas Feeds lenses Silicon Surface treatment

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Man versus Machine: a lens design Challenge

Man versus Machine: a Lens Design Challenge

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conference on current developments in lens design and optical engineering XIV

作者： Dilworth, Donald C. Shafer, David Optical Systems Design Inc. (United States) David Shafer Optical Design (United States)

After a generation of writing and improving lens design software, it is time to assess where we are. Specifically, can a modern program compete with, or surpass, the best human designers? Here we describe a friendly c... 详细信息

ISBN: (纸本)9780819496911

关键词： lens design global optimization optimization algorithms aberration theory

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Polarization fields for understanding polarization aberrations in optical imaging systems

Polarization fields for understanding polarization aberratio...

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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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On the development of silicon micromachined lens antennas for THz integrated heterodyne arrays

On the development of silicon micromachined lens antennas fo...

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International conference on Infrared and Millimeter Waves

作者： N. Llombart M. Alonso-delPino C. Lee G. Chattopadhyay C. Jung-Kubiak I. Mehdi Technical University of Deft The Netherlands Jet Propulsion Laboratory USA

关键词： lenses Antenna arrays Silicon Antenna radiation patterns Surface treatment Feeds Directive antennas

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Dense-array concentrator photovoltaic system using non-imaging dish concentrator and crossed compound parabolic concentrator

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AIP conference Proceedings 2015年第1期1657卷

作者： Kok-Keong Chong Tiong-Keat Yew Chee-Woon Wong Ming-Hui Tan Woei-Chong Tan An-Chow Lai Boon-Han Lim Sing-Liong Lau Faidz Abdul Rahman Faculty of Engineering and Science Universiti Tunku Abdul Rahman off Jalan Genting Kelang Setapak 53300 Kuala Lumpur Malaysia

Solar concentrating device plays an important role by making use of optical technology in the design, which can be either reflector or lens to deliver high flux of sunlight onto the Concentrator Photovoltaic (CPV) module receiver ranging from hundreds to thousand suns. To be more competitive compared with fossil fuel, the current CPV systems using Fresnel lens and Parabolic dish as solar concentrator that are widely deployed in United States, Australia and Europe are facing great challenge to produce uniformly focused sunlight on the solar cells as to reduce the cost of electrical power generation. The concept of non-imaging optics is not new, but it has not fully explored by the researchers over the world especially in solving the problem of high concentration solar energy, which application is only limited to be a secondary focusing device or low concentration device using Compound Parabolic Concentrator. With the current advancement in the computer processing power, we has successfully invented the non-imaging dish concentrator (NIDC) using numerical simulation method to replace the current parabolic dish as primary focusing device with high solar concentration ratio (more than 400 suns) and large collective area (from 25 to 125 m2). In this paper, we disclose our research and development on dense array CPV system based on non-imaging optics. The geometry of the NIDC is determined using a special computational method. In addition, an array of secondary concentrators, namely crossed compound parabolic concentrators, is also proposed to further focus the concentrated sunlight by the NIDC onto active area of solar cells of the concentrator photovoltaic receiver. The invention maximizes the absorption of concentrated sunlight for the electric power generation system.

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Application of the light field for a simulation to evaluate the MTF of optical lens systems using rendering

Application of the light field for a simulation to evaluate ...

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conference on current developments in lens design and optical engineering XIV

作者： Horiuchi, Shuma Yamamoto, Manabu Tokyo Univ Sci Dept Appl Elect Katsushika Ku Tokyo 1258585 Japan

ISBN: (纸本)9780819496911

The modulation transfer function (MTF) in lens systems can be simulated using rendering. Here, the MTF is obtained by rendering test charts with bar target patterns after they are passed through an optical imaging system. The benefit of this method is that it can be applied to shift-variant systems, to which it is difficult to apply the point spread function (PSF), and that it enables the comparison of theoretical results to experimental results when test charts are imaged through an optical imaging system. However, the number of sampled rays must be increased to suppress the variance in the resulting radiance distribution, and the computation time increases proportionally with the number of analyzed spatial frequencies. This report proposes the recording of the light field of light rays, which is a function describing light rays at the entrance pupil. Focused images are compiled for each test chart based on the recorded light field. The time necessary for compilation is significantly shorter than for ray tracing in a lens;therefore, the radiance distribution can be rapidly obtained when the spatial frequency is changed. The methodology to record the light field and the data format are outlined in this report.

关键词： rendering light field modulation transfer function imaging optics

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Using the toroidal and cylindrical lenses to project the RGB LEDs sources on the lens array with elliptic solid angle calculation for the DLP projector

Using the toroidal and cylindrical lenses to project the RGB...

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conference on current developments in lens design and optical engineering XIV

作者： Sun, Wen-Shing Natl Cent Univ Dept Opt & Photon Chungli 32001 Taiwan

We present an asymmetric condenser with an elliptical solid angle distribution and improves system efficiency of 15.5%. The proposed system on the DMD achieves the light efficiency of 63.4% and the average deviation o... 详细信息

ISBN: (纸本)9780819496911

关键词： RGB LEDs DLP projector lens array elliptical solid angle

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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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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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Double micro-prism array design for reducing dispersion on prism-based stereo camera system

Double micro-prism array design for reducing dispersion on p...

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conference on current developments in lens design and optical engineering XIV

作者： Sun, Wen-Shing Chu, Pu-Yi Natl Cent Univ Dept Opt & Photon Chungli 32001 Taiwan

We apply a digital camera with two prism arrays to capture a stereo image of the corrected chromatic aberration and distortion. The doublet prisms are used to correct chromatic aberration. The camera distortion with t... 详细信息

ISBN: (纸本)9780819496911

关键词： stereo image two prism arrays chromatic aberration distortion

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