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current developments in lens design and optical engineering VII

作者： Deslis, Apostolos Ball Aerospace and Technologies Corp. 1600 Commerce St. Boulder CO 80301

ISBN: (纸本)0819463671

In this paper I will describe the design of a warm shield used in an infrared system that operates in the 8-12 micron wavelength region. I will describe the optical design considerations, show the experimental setup, describe the testing process and then I will evaluate the performance of the warm shield dewar against proposed requirements.

关键词： optical design

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design of miniaturized optoelectronic systems using resonant micro scanning mirrors for projection of full-color images

Design of miniaturized optoelectronic systems using resonant...

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Conference on current developments in lens design and optical engineering VII

作者： Scholles, M. Braeuer, A. Frommhagen, K. Gerwig, Ch. Hoefer, B. Lakner, H. Schenk, H. Schwarzenberg, M. Fraunhofer Inst Photon Microsyst Maria Reiche Str 2 D-01109 Dresden Germany Fraunhofer Inst Appl Opt & Precis Engn D-07745 Jena Germany

ISBN: (纸本)0819463671

Projection systems comprising micromechanical. scanning mirrors are a promising approach for information display of any kind. If combined with advanced laser diodes as light sources, ultra-compact projection heads can be realized, as it will be shown in this contribution. Besides the laser, key component of the system is a special MEMS device, a two-dimensional resonant micro scanning mirror. The laser beam formed by collimator optics is directed onto the micro scanning mirror. Then, the reflected beam describes a highly complicated Lissajous figure on the projection screen with flare angles of up to 20 degrees. By driving the mirror and electrically modulating the intensity of the laser beam in a synchronous manner, projection of images can be achieved. Advanced techniques that guarantee improved image quality and allow compensation of artifacts because of relative movement between projection head, screen, and human observer will be described. Based on these principles, several optoelectronic systems have been designed. A monochrome projection head that incorporates the laser diode, optics and the micro mirror could be reduced to a volume of 15mm x 7 mm x 5mm. A slightly larger head is attached to a laser unit with red, green, and blue lasers via glass optical fiber for projection of full color images and video streams. All systems have VGA (640 x 480 pixels) resolution. They operate with 8 bit color depth per pixel and 50 frames per second. These key features in combination with the miniaturized size allow their use for a broad range of applications.

关键词： image projection scanning mirror MEMS resonant scanning micro optics

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design of a thermal imaging diagnostic using 90-degree, off-axis parabolic mirrors

Design of a thermal imaging diagnostic using 90-degree, off-...

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Conference on current developments in lens design and optical engineering VII

作者： Malone, Robert M. Becker, Steven A. Dolan, Daniel H. Hacking, Richard G. Hickman, Randy J. Kaufman, Morris I. Stevens, Gerald D. Turley, William D. NSTec Los Alamos Operat 182 East Gate Dr Los Alamos NM 87544 USA NSTec North Las Vegas Operat Las Vegas NV 89193 USA Sandia Natl Labs Albuquerque NM 87185 USA NSTec Special Technol Lab Santa Barbara CA 93111 USA

ISBN: (纸本)0819463671

Thermal imaging is an important, though challenging, diagnostic for shockwave experiments. Shock-compressed materials undergo transient temperature changes that cannot be recorded with standard (greater than ins response time) infrared detectors. A farther complication arises when optical elements near the experiment are destroyed. We have designed a thermal-imaging system for studying shock temperatures produced inside a gas gun at Sandia National Laboratories. Inexpensive, diamond-turned, parabolic mirrors relay an image of the shocked target to the exterior of the gas gun chamber through a sapphire vacuum port. The 3000-5000-nm portion of this image is directed to an infrared camera which acquires a snapshot of the target with a minimum exposure time of 150 us. A special mask is inserted at the last intermediate image plane, to provide dynamic thermal background recording during the event. Other wavelength bands of this image are split into high-speed detectors operating at 900-1700 nm and at 1700-3000 nm, for time-resolved pyrometry measurements. This system incorporates 90-degree, off-axis parabolic mirrors, which can collect low f/# light over a broad spectral range, for high-speed imaging. Matched mirror pairs must be used so that aberrations cancel. To eliminate image plane tilt, proper tip-to-tip orientation of the parabolic mirrors is required. If one parabolic mirror is rotated 180 degrees about the optical axis connecting the pair of parabolic mirrors, the resulting image is tilted by 60 degrees. Different focal-length mirrors cannot be used to magnify the image without substantially sacrificing image quality. This paper analyzes performance and aberrations of this imaging diagnostic.

关键词： mid-IR imaging off-axis parabolic mirrors gas gun imaging IR camera pyrometry

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2nd International Symposium on Advanced optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes

2nd International Symposium on Advanced Optical Manufacturin...

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2nd International Symposium on Advanced optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes

The proceedings contain 37 papers. The topics discussed include: current development of advanced optical technology in IOE, CAS;the mechatronic approach to the design of large mirrors and telescopes;new developments in the precessions process for manufacturing free-form, large-optical, and precision-mechanical surfaces;new solutions for innovative extremely large telescopes;test setup for large size deformable convex mirrors and application to 8m convex secondary mirrors for ELT's;support systems for segmented: an overview;application of steel balls to lens calibration in space solar telescope;CFRP solutions for the innovative telescope design;and properties of Zerodur mirron blanks for extremely large telescopes.

关键词： Telescopes

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Proceedings of SPIE: current developments in lens design and optical engineering VI

Proceedings of SPIE: Current Developments in Lens Design and...

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current developments in lens design and optical engineering VI

The proceedings contain 27 papers. The topics discussed include: using multi-function components to solve optical design challenges for DUV microlithographic applications;automated synthesis of both the topology and numerical parameters for seven patented optical lens systems using genetic programming;advances in lenticular lens arrays for visual display;wide field-of-view imaging system using a liquid crystal spatial light modulator;design tools for freeform optics;designing and specifying aspheres for manufacturability;infrared hybrid optics with high broadband efficiency;removing challenges in microlithographic optical design;laser beam filtering by refractive or diffractive microstructures;and a hybrid athermal CCD camera.

关键词： optical design

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optical design of liquid crystal lenses: Off-axis modelling

Optical design of liquid crystal lenses: Off-axis modelling

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current developments in lens design and optical engineering VI

作者： Kirby, A.K. Hands, P.J.W. Love, G.D. Durham University Dept. of Physics Durham DH1 3LE United Kingdom

We report on our work on producing liquid crystal switchable modal lenses and their use in a compound lens system in order to produce variable focus/zoom lenses. We describe work on producing a high power lens, and present theoretical work on off-axis phase modulation in a liquid crystal lens which is important in order to be able to carry out a complete optical design of a liquid crystal lens.

关键词： Liquid crystal displays

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Mechanical fabrication of precision microlenses on optical fiber endfaces

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optical engineering 2005年第12期44卷 123402-1-123402页

作者： Milton, G Gharbia, Y Katupitiya, J Univ New S Wales Sch Mech & Mfg Engn Sydney NSW 2052 Australia

We present a purely mechanical means of producing highly concentric spherical lenses at the endfaces of optical fibers. The production process has two stages. First, conical lenses are produced in a grinding process that ensures excellent concentricity. Then, the conical lenses are transformed to spherical lenses using a novel process called loose abrasive blasting. The cone grinding is carried out on a microgrinding machine, which has a sophisticated control system that enables the production of precision conical lenses. The blasting is carried out on a diamond blasting machine. Plots showing automatic centering performance of the microgrinding machine and scanning electron microscopy images of the conical and spherical lenses are presented. (c) 2005 Society of Photo-optical Instrumentation Engineers.

关键词： microlens optical fiber endface cone grinding

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optical design of the Terrestrial Planet Finder Coronagraph starlight suppression system

Optical design of the Terrestrial Planet Finder Coronagraph ...

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current developments in lens design and optical engineering VI

作者： Mouroulis, Pantazis Shaklan, Stuart B. Jet Propulsion Laboratory California Institute of Technology Pasadena CA 91109

A baseline design for NASA's Terrestrial Planet Finder Coronagraph (TPFC) starlight suppression system (SSS) is described. The design is based on a 8×3.5m elliptical aperture telescope leading to terrestrial planet detection at a minimum angle of ∼4λ/D. The design accommodates classical Lyot coronagraph as well as shaped pupil approaches and includes separate optical paths for two polarizations each with its own deformable mirror control. Critical design challenges and trades are described.

关键词： optical design

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Remaining challenges in microlithographic optical design

Remaining challenges in microlithographic optical design

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current developments in lens design and optical engineering VI

作者： Williamson, David M. Nikon Research Corporation of America 12490 N. Rancho Vistoso Blvd. Tucson AZ 85737 United States

Rayleigh scaling equations for resolution and the control of computer chip critical dimensions (CD) within a finite depth of focus (DOF) have always indicated that resolution is better improved by reductions in wavelength of exposure light rather than by increasing the numerical aperture (NA) of the projection optics, particularly as it approaches the physical limit in air of 1.0. However, liquid immersion of the image increases the physical NA limits and presents new optical design challenges, while postponing the necessity for drastic reductions in the wavelength.

关键词： optical design

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optical design of wide field of view achromatic phase retarders

Optical design of wide field of view achromatic phase retard...

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current developments in lens design and optical engineering VI

作者： Deslis, Apostolos Ball Aerospace and Technologies Corporation 1600 Commerce Street Boulder CO 80301 United States

In this paper I will describe some of the properties that govern retarders made of uni-axial birefrigent materials, and discuss how to optimize wide field of view superachromatic retarders using commercially available software. To demonstrate the technique, examples of half wave plates are shown, that achieve maximum 0.04 waves of retardance deviation over the wavelength range 300 nm to 1100 nm having a field of view +/-10 degrees.

关键词： Phase modulation

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