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optical design and Predicted Performance of the WFIRST Phase-B Imaging Optics Assembly and Wide Field Instrument 19

Optical Design and Predicted Performance of the WFIRST Phase...

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

作者： Pasquale, Bert A. Casey, Thomas Marx, Catherine Gao, Guangjun Armani, Nerses Content, David Hagopian, John Jurling, Alden Jackson, Clifton Liu, Alice Whipple, Art Murray, Jacob NASA Goddard Space Flight Ctr Greenbelt MD 20771 USA AS&D Inc 7000 Muirkirk Meadows Dr Beltsville MD 20705 USA Sigma Space Inc 4600 Forbes Blvd Lanham MD 20706 USA SGT Inc 7701 Greenbelt Rd Greenbelt MD 20770 USA ATA Aerosp Inc Greenbelt MD 20770 USA Conceptual Analyt Inc Glenn Dale MD 20769 USA Rose Hulman Inst Technol Terre Haute IN 47803 USA

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

Now in Phase-B, the architecture of the Wide-Field Infra-Red Survey Telescope (WFIRST) payload has matured since 2013 to accommodate various opto-mechanical constraints. Based on a 2.4-meter aperture Forward optical Assembly (FOA), the Imaging Optics Assembly (IOA) provides corrected optical fields to each on-board instrument. Using a Three Mirror Anastigmat (TMA) optical design, the Wide-Field Channel (WFC) provides similar to 1/3-square degree of instantaneous field coverage at 0.11 arcsecond pixel scale. The WFC as-built predictive analysis anticipates near diffraction-limited imaging over a focal plane of 300.8 million pixels, operating in seven panchromatic bands between 0.48 -2.0 mu m, or a 1-octive multi-spectral imaging mode from similar to 0.95-1.93 mu m. The IOA provides the Coronagraph Instrument (CGI) a collimated beam with very specific wavefront constraints. We present configuration changes since 2013 that improved interfaces, improved testability, and reduced technical risk. We provide an overview of our Integrated Modeling results, performed at an unprecedented level for a phase-A study, to illustrate performance margins with respect to static wavefront error, jitter, and thermal drift.

关键词： Space Instrumentation Astronomical Optics Imaging Systems Telescopes Dark Energy Spectroscopy Systems engineering Integrated Modeling

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Electro-chromic device with GZO as a conductive layer

Electro-chromic device with GZO as a conductive layer

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conference on current developments in Lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Chan, Chih-Chao Tang, Chien-Jen Lee, Kun-Hsien Jaing, Cheng-Chung Kuo, Chien-Cheng Chen, Hsi-Chao Lee, Cheng-Chung Natl Cent Univ Thin Film Technol Ctr Dept Opt & Photon Chungli 320 Taiwan MingHusin Univ Sci & Technol Dept Appl Mat & Optoelect Engn Hsinchu Taiwan Natl Yunlin Univ Sci & Technol Grad Sch Optoelect Yunlin Taiwan

ISBN: (纸本)9780819482822

Thin films of tungsten oxide (WO3) were deposited on GZO-coated B270 glass substrates and thin films of Ta2O5 were deposited on B270 glass substrates by electron beam gun evaporation at high vacuum pressure of 3x10(-5) Torr and varied oxygen pressures ranging from 1.0x10(-4) to 6.0x10(-4) Torr. The optical properties of the electro-chromic (EC) film were measured by a spectrophotometer. The optical modulation (Delta T) of the tungsten oxide thin film deposited at an oxygen pressure of 1.0x10(-4) Torr was found to be Delta T = 67.46% at lambda=550nm. The optimum optical properties for deposition of Ta2O5 were attained at an oxygen pressure of 4x10(-4) Torr. Gallium doped zinc oxide (GZO) was used as a conductive layer instead of ITO. A five layer EC device (Glass/GZO/WO3/Ta2O5/NiO/Al) has been design and fabricated.

关键词： Electro-chromic devices transparent conducting oxide tungsten oxide optical modulation

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Investigation of the optical and Structural Properties of WO₃ Thin Films with Different Sputtering Power Supplies

Investigation of the Optical and Structural Properties of WO...

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conference on current developments in Lens design and optical engineering XIII

作者： Chen, Hsi-Chao Jan, Der-Jun Chen, Chien-Han Huang, Kuo-Ting Luo, Yu-Siang Chen, Jia-Min Natl Yunlin Univ Sci & Technol Grad Sch Optoelect Yunlin 64002 Taiwan

ISBN: (纸本)9780819492036

The purpose of this research was to investigate the optical and structural properties of tungsten oxide (WO3) thin films deposited with three different sputtering power supplies: direct current (DC), DC pulse and radio frequency (RF). These WO3 thin films were deposited on ITO glass and silicon substrate with different gas ratios of oxygen and argon (O-2/Ar ratio). WO3 thin film is the role of the electrochromic window was resulted from the advantages of large variation in optical density, high response efficiency, no toxicity and low cost. The experimental results showed that optical intensity increased with the increasing of O-2/Ar ratio and all films have the 950cm(-1) peak which the bonding of W+6=O in Raman spectra. Hence, the O-2/Ar ratio was changed from 0.4 to 0.8 to study the ability of coloring and bleaching for the three different power supplies. Anyways, the WO3 thin films had the best electrochromic property at the O-2/Ar ratio of 0.7, 0.6 and 0.6 for DC, DC pulse, and RF, respectively. The transmittances could be over 75% for all films at as-deposited and the deposition rates were between 0.8 and 0.1 angstrom s(-1). Simultaneously, the transmittance variations (Delta T) were 51%, 57% and 53% for DC, DC pulse, and RF power sources at wavelength of 550 nm, respectively. The coloration ability of WO3 thin film deposition with power supply of DC pulse was better than that of the DC and RF.

关键词： Tungsten oxide (WO3) direct current (DC) magnetron sputtering pulsed DC sputtering radio frequency (RF) sputtering Raman spectra

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design of high numerical aperture Fourier objectives for holographic memory card writing/reading equipment

Design of high numerical aperture Fourier objectives for hol...

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conference on current developments in Lens design and optical Systems engineering

作者： Erdei, G Fodor, J Kalló, P Szarvas, G Ujhelyi, F Optilink Hungary Ltd H-1031 Budapest Hungary

ISBN: (纸本)0819437387

A pair of special Fourier transforming objectives intended for use in a Holographic Memory Card (HMC) writing/reading equipment have been designed and fabricated. At writing in, the objectives Fourier transform a binary pattern, representing the data displayed by an SLM, into the storage medium of the HMC, where the Fourier transform is recorded as a polarisation hologram. At reading out, the objectives inverse Fourier transform the reconstructed hologram onto the surface of a CCD array. The Fourier space NA of the objectives is high enough to achieve a theoretical data density of 1 bit/mum(2) For comparison reasons we designed two optically identical objectives of basically different structures: one is an aspheric glass doublet, the other is an all-spherical five-element system (arranged in two lens groups). Computer analysis of the objectives shows that both systems are diffraction limited in object and Fourier space and have a distortion of less than 1%. In this paper we overview the theory of Fourier objectives, present our design method, describe the optical behaviour of the designed systems, show our test results performed on the fabricated aspheric objective and present our experiences at manufacturing aspheric glass lens prototypes.

关键词： optical design geometrical optics Fourier objective spherical system aspheric glass lens

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The design of microscopic system using zoom structure with a fixed magnification and the independency on the variation of object distance

The design of microscopic system using zoom structure with a...

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conference on current developments in Lens design and optical engineering V

作者： Ryu, JM Jo, JH Jung, JH Chun, YS Kang, GM Hannam Univ Sch Nat Sci Taejon 306791 South Korea

ISBN: (纸本)0819454613

The multi-configurative microscopic system for inspecting the wire-bonding of reed frame is designed. Object rays is nearly collimated by a objective lens group which is a common lens group of x2 and x6 imaging lens systems and is splitted by two beam-splitters composed of a penta-prism and a refracting prism. And object rays started from the central region and the boundary region(reed frame region) on semiconductor chip(that is, the object) are imaged at the two different imaging planes by x2 and x6 imaging lens groups, respectively. The x6 imaging lens system with a constant object distance and a constant magnification is well designed by general imaging optics system design method. However, since the depth of wire structure on the reed frame has about +/-3 mm, in order to observe by a constant magnification and at a fixed imaging plane without the dependency on the variation of objective distance generated by the depth of wire structure on the reed frame, the imaging lens system is composed of two separated groups, which should be moved along nonlinear locus like mechanically compensated zoom lenses. The nonlinear equations for zoom locus are derived by using the Gaussian bracket. Refraction powers and positions of each groups are numerically determined by solving the equations, and initial design data for each groups is obtained by using Seidel third order aberration theory. The optimization technique is finally utilized to obtain this multi-configurative microscopic system.

关键词： lens design equivalent lens imaging system microscopic system multi-configurative system

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Proceedings of SPIE: Intelligent systems in design and manufacturing iv

Proceedings of SPIE: Intelligent systems in design and manuf...

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Intelligent Systems in design and Manufactoring iv

The proceedings contains 16 articles from the conference of SPIE: Intelligent systems in design and Manufacturing iv. Topics discussed include: collaboration platform for design agility;safety by design and future developments;new expert system approach for the design of a diagnosis tool in a production plant;state observer for the aluminium reduction process;and use of knowledge-based assistant in marketing of bulk fertilizer storage plants.

关键词： Product design

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Optimized design on the light outlet of optical fibre large screen display

Optimized design on the light outlet of optical fibre large ...

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Proceedings of the 1998 conference on current developments in optical Elements and Manufacturing

作者： Shen, Shuqun Yao, He Shen, Yuchao Fan, Rong Beijing Univ of Posts & Telecom Beijing China

optical fibre large screen display is a novel technique in the field of large screen display. The design of the optical fibre light outlet (polyvinyl rode shaped) should be optimized in consideration of the viewing field and the radiant intensity of the screen. The principal direction and the field distribution of the light output of the rode shaped outlet should be considered in designs. The conclusion of the computer simulation shows that the brightness of the screen will reach 4000 nit, the viewing angle will be 20° in meridian plane and 120° in sagittal plane.

关键词： Fiber optics

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Fielding of an imaging VISAR diagnostic at the National Ignition Facility (NIF)

Fielding of an imaging VISAR diagnostic at the National Igni...

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conference on current developments in Lens design and optical engineering V

作者： Malone, RM Bower, JR Capelle, GA Celeste, JR Celliers, PM Frogget, BC Guyton, RL Kaufman, MI Lare, GA Lee, TL MacGowan, BJ Montelongo, S Ng, EW Thomas, TL Tunnell, TW Watts, PW Bechtel Nevada Los Alamos NM 87544 USA Lawrence Livermore Natl Lab Livermore CA 94551 USA

ISBN: (纸本)0819454613

The National Ignition Facility (NIF) requires diagnostics to analyze high-energy density physics experiments. As a core NIF early light diagnostic, this system measures shock velocities, shock breakout times, and shock emission of targets with sizes from I to 5 mm. A 659.5 nm VISAR probe laser illuminates the target. An 8-inch-diameter fused silica triplet lens collects light at f/3 inside the 33-foot-diameter vacuum chamber. The optical relay sends the image out an equatorial port, through a 2-inch-thick vacuum window, and into two VISAR (Velocity Interferometer System for Any Reflector) interferometers. Both streak cameras and CCD cameras record the images. Total track is 75 feet. The front end of the optical relay can be temporarily removed from the equatorial port, allowing for other experimenters to use that port. The first triplet can be no closer than 500 mm from the target chamber center and is protected from debris by a blast window that is replaced after every event. Along with special coatings on the mirrors, cutoff filters reject the NIF drive laser wavelengths and pass a band of wavelengths for VISAR, for passive shock breakout light, or for thermal imaging light (bypassing the interferometers). Finite Element Analysis was performed on all mounting structures. All optical lenses are on kinematic mounts, so that the pointing accuracy of the optical axis can be checked. A two-color laser alignment scheme is discussed.

关键词： VISAR optical relay interferometer National Ignition Facility (NIF) streak camera

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optical and system engineering in the development of a high-quality student telescope kit

Optical and system engineering in the development of a high-...

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conference on Modeling, Systems engineering and Project Management for Astronomy iv

作者： Pompea, Stephen M. Pfisterer, Richard N. Ellis, Scott Arion, Doug N. Fienberg, Richard Tresch Smith, Thomas C. Natl Opt Astron Observ 950 N Cherry Ave Tucson AZ 85719 USA Photon Engn LLC Tucson AZ 85711 USA Carthage Coll Dept Phys Kenosha WI 53140 USA Amer Astron Soc Washington DC 20009 USA Merit Models Racine WI 53406 USA

ISBN: (纸本)9780819482280

The Galileoscope student telescope kit was developed by a volunteer team of astronomers, science education experts, and optical engineers in conjunction with the International Year of Astronomy 2009. This refracting telescope is in production with over 180,000 units produced and distributed with 25,000 units in production. The telescope was designed to be able to resolve the rings of Saturn and to be used in urban areas. The telescope system requirements, performance metrics, and architecture were established after an analysis of current inexpensive telescopes and student telescope kits. The optical design approaches used in the various prototypes and the optical system engineering trade-offs will be described. Risk analysis, risk management, and change management were critical as was cost management since the final product was to cost around $15 (but had to perform as well as $100 telescopes). In the system engineering of the Galileoscope a variety of analysis and testing approaches were used, including stray light design and analysis using the powerful optical analysis program FRED (TM).

关键词： Telescope refractors kits system optimization education

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optical modeling of bullet-shaped LED for use in self-luminous traffic signs 18

Optical modeling of bullet-shaped LED for use in self-lumino...

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conference on current developments in Lens design and optical engineering XVIII

作者： Lee, Ted L. Chen, Yi-Chun Tsai, Ming-Siou Sun, Ching-Cherng Natl Cent Univ Dept Opt & Photon 300 Zhongda Rd Taoyuan 32001 Taiwan

ISBN: (纸本)9781510612082;9781510612075

Bullet-shaped LEDs are commonly used in self-luminous traffic signs as LED-dotted matrices due to their low cost, simplicity, robustness, and ease of installation. We proposed a simple low-cost method that creates a model suitable for the high manufacturing tolerance found in bullet-shaped LEDs. The method starts from measuring multiple one-dimensional angular intensity patterns at interested distances from multiple LEDs to form a database, including distances at 10, 15, 20, 25, 35, 50, and 100 mm. Their normalized cross-correlations are then calculated to find the batch that has the most similarity and base our model off that batch. Finally, we validate the model via Monte Carlo simulations in comparison to the original one-dimensional angular intensity patterns in the database. The platform demonstrated to obtain an average of 99% in normalized cross correlation between different batches of the same model LED, and a model of that LED is currently under development.

关键词： LED modeling midfield bullet packaging dome package traffic signs

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