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检索条件"任意字段=Current Developments in Lens Design and Optical Engineering IX"

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design AND CONSTRUCTION OF AN ASTROMETRIC ASTROGRAPH

DESIGN AND CONSTRUCTION OF AN ASTROMETRIC ASTROGRAPH

引用

CONF ON current developments IN optical design AND optical engineering 2

作者： VUKOBRATOVICH, D VALENTE, T SHANNON, RR HOOKER, R SUMNER, RE Optical Sciences Ctr./Univ. of Arizona (United States)

ISBN: (纸本)0819409251

The optical Sciences Center, University of Arizona, has designed and constructed a unique 'red corrected' astrometric astrograph objective lens for the United States Naval Observatory. A five element design, with an integral Schott OG550 filter, was developed to meet the requirement for a 2060 mm focal length, f/10 system. The lens provides a nearly zero distortion flat field of 5 by 5 degrees in the sky. A weight limit of 55 kg led to the use of a titanium lens barrel. Assembly tolerances are satisfied through the use of elastomeric subcell mounting of the individual elements, and an adjustable final element. The lens is hermetically sealed and uses a filter/dessicator system to insure the long term cleanliness of the optics.

关键词： Tolerancing Distortion Adhesives Titanium Assembly tolerances optical design optical filters Photography Glasses lens design

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lens BLOCKING METHOD FOR OPTICAM

LENS BLOCKING METHOD FOR OPTICAM

引用

CONF ON current developments IN optical design AND optical engineering 2

作者： NOVAK, R MARRO, M TIPPS, JD CZAJKOWSKI, W DEMARCO, J SALAMON, PA MATCHETT, D CAPUTO, F LEBLANC, G Monroe Community College (United States) Eastman Kodak Co. (United States) Loctite Corp. (United States)

ISBN: (纸本)0819409251

A uv-curing 'cold' blocking adhesive has been developed by Loctite Corporation for use with the Opticam SM. The adhesive is a significant advance in the lens blocking process, as it eliminates heat-induced blocking strain; the most significant problem encountered with current hot pitch blocking methods. The new cold blocking adhesive is complemented by a new Kennametal lens blocking adapter tool and chucking system. The tooling offers substantially improved lens adapter to machine alignment and transfer; at considerably lower cost. The lenses are deblocked in a heated water and detergent solution, eliminating the environmental concerns of the current method.

关键词： Adhesives Optics manufacturing Glasses Light sources optical alignment Precision optics Roads UV optics Computing systems optical fabrication

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NEW design METHOD FOR ATHERMALIZED optical-SYSTEMS

NEW DESIGN METHOD FOR ATHERMALIZED OPTICAL-SYSTEMS

引用

CONF ON current developments IN optical design AND optical engineering 2

作者： TAMAGAWA, Y WAKABAYASHI, S TAJIME, T Mitsubishi Electric Corp. (Japan)

ISBN: (纸本)0819409251

This paper describes a new design method for athermalized optical systems. It can be accomplished by combining optical materials and by selecting suitable lens powers. However, there are difficulties in determining material and power of each lens, because achromatism is simultaneously required. To determine the condition of eliminate thermal focus shift and longitudinal chromatic aberration easily by simple drawing, an athermal chart is proposed which is constructed by plotting chromatic dispersive power and thermal dispersive power on a cartesian coordinate system.

关键词： Modulation transfer functions Zinc Colorimetry Germanium Chromatic aberrations Temperature metrology Visualization Gallium arsenide Refractive index Thermography

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Double-gauss four-element objective design by using an aspherical surface to correct its aberrations

Double-gauss four-element objective design by using an asphe...

引用

current developments in optical design and optical engineering II

作者： Juang, Jeng-Dang Chang, Ming-Wen Natl. Central Univ. Taipei Taiwan

ISBN: (纸本)0819409251

The first-order Double-Gauss 4 element objective arrangement derived from a triplet type by splitting the central negative element is discussed. The Petzval sum of the lens system was chosen and calculated. With desired axial color, glasses will be selected and axial color calculated. By using the aspherical coefficients, we discuss the aberrations compensation. Following the design procedures to design a camera objective, the lens data after optimization and the MTF curve are presented.

关键词： optical devices

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Fabrication of high-quality small plano-convex lens

Fabrication of high-quality small plano-convex lens

引用

current developments in optical design and optical engineering II

作者： Cheng, Ter-Chin Hu, Yeu-Jent Chang, Rong-Seng Natl. Central Univ. Chung-Li Taiwan

ISBN: (纸本)0819409251

In this paper, we design a new method, which can accurately and efficiently finish the small and soft semiconductor plano-convex lens. Special features of this process are as following: (1) A scratch-free and smooth surface produce. (2) A precision blocking jigs has been constructed which enables the operators to adjust the wedge angle of plano-convex lens precisely. (3) A rapid testing method of wedge angle has been studied.

关键词： lenses

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design AND PERFORMANCE OF AN AUTOMATED VIDEO-BASED LASER-BEAM ALIGNMENT SYSTEM

DESIGN AND PERFORMANCE OF AN AUTOMATED VIDEO-BASED LASER-BEA...

引用

CONF ON current developments IN optical design AND optical engineering 2

作者： RUNDLE, WJ KARTZ, MW BLISS, ES ENGLISH, RE PETERSON, RL THOMPSON, GR UHLICH, DM Martin Marietta Energy Systems Inc. (United States) KMI Energy Inc. (United States) Lawrence Livermore National Lab. (United States)

ISBN: (纸本)0819409251

This paper describes the design and performance of an automated, closed-loop, laser beam alignment system. Its function is to sense a beam alignment error in a laser beam transport system and automatically steer mirrors preceding the sensor location as required to maintain beam alignment. The laser beam is sampled by an optomechanical package which uses video cameras to sense pointing and centering errors. The camera outputs are fed to an image processing module, which includes video digitizers and uses image storage and software to sense the centroid of the image. Signals are sent through a VMEbus to an "optical device controller" (ODC), which drives stepper-motor actuators on mirror mounts preceding the beamsampling location to return the beam alignment to the prescribed condition. Photodiodes are also used to extend the control bandwidth beyond that which is achievable with video cameras. This system has been operated at LLNL in the Atomic Vapor Laser Isotope Separation (AVLIS) program to maintain the alignment of copper and dye laser beams, the latter to within tr in pointing and less than 1 mm in centering. The optomechanical design of the instrumented package, which includes lens, mirror, and video mounts in a rigid housing, the automated control system architecture, and the performance of this equipment is described.

关键词： Sensors Control systems optical alignment Mirrors Cameras Image processing CCD image sensors Lithium Video Laser systems engineering

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OPTIMIZATION OF ORIGINAL lens STRUCTURE TYPE FROM optical lens DATA-BASE

OPTIMIZATION OF ORIGINAL LENS STRUCTURE TYPE FROM OPTICAL LE...

引用

5TH CONF ON current developments IN optical design AND optical engineering

作者： YANG, DR JIANG, HL LI, GD YANG, HM Changchun Institute of Optics and Fine Mechanics (China)

ISBN: (纸本)0819406554

This paper presents a new idea for the optimization of an initial lens structure type from an optical lens database on the basis of introducing optical lens database (OLDB) and computer- aided optical design (CAOD) systems. Using image-quality target parameters as conditional search parameters of optimization of initial lens structure type from database, and evaluating selected lens quality with surface relative aperture (h/r), the authors were able to obtain a good effectiveness in practice.

关键词： Image quality optical design lens design optical engineering Databases Glasses Optics manufacturing Crystal optics Mechanics Objectives

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ALIGNMENT OF AN ASPHERIC MIRROR SUBSYSTEM FOR AN ADVANCED INFRARED CATADIOPTRIC SYSTEM

ALIGNMENT OF AN ASPHERIC MIRROR SUBSYSTEM FOR AN ADVANCED IN...

引用

5TH CONF ON current developments IN optical design AND optical engineering

作者： TINGSTAD, JS Hughes Aircraft Co. (United States)

ISBN: (纸本)0819406554

With many optical systems the method that is used to align the optical system needs to be an integral portion of the system design and not an afterthought. Once all the pieces are in fabrication it may be too late to implement a cost-effective alignment procedure for both prototype and production designs. This is especially true with catadioptric systems where the mirror alignment tends to be very critical as far as system performance is concerned. This paper describes the design and use of an aspheric null mirror for the alignment of a two mirror subsystem to a lens cell. The optical system to be aligned was a six-in. EFL, F/2 system working in the 3-5 micrometers bandpass. It consisted of two aspheric mirrors, one aspheric lens, and two spherical lenses.

关键词： Mirrors Aspheric lenses optical alignment Aspheric optics Combined lens-mirror systems optical engineering Infrared imaging Infrared radiation optical design Spherical lenses

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PLASTIC lens ARRAY WITH THE FUNCTION OF FORMING UNIT MAGNIFICATION ERECT IMAGE USING ROOF PRISMS

PLASTIC LENS ARRAY WITH THE FUNCTION OF FORMING UNIT MAGNIFI...

引用

5TH CONF ON current developments IN optical design AND optical engineering

作者： TAKAHASHI, E TANJI, S TANAKA, A HAYASHI, Y Fujitsu Ltd. (Japan)

ISBN: (纸本)0819406554

An original plastic-lens array molded integrally as one block having a function of forming a unit-magnification erect image has been developed. The lens array consists of eight lens devices. The lens device has a roof prism, a reflecting v-groove, and a pair of convex-lens surfaces. A prototype of the lens arrays are arranged side by side. Thickness of the lens array is 4.5 mm, distance between object and image planes is 14.4 mm, array pitch is 1.3 mm, and the effective imaging region is 220 mm. The average modulation transfer function (MTF) at 41 p/mm of the lens array is 76% in the row direction (Y-direction) and 80% in the direction (X-direction) normal to Y-direction. The average F/NO in line-scanning is 1.8. The average irradience unevenness in line-scanning is 17%. The focal depth is +/- 0.6 mm in the area with the MTF being 60% or more. With this prototype a high-resolution image was attained. So, the lens arrays can be applied to imaging devices for use in a compact facsimile, image scanner, LED printer, and so on.

关键词： optical engineering Prisms Prototyping Modulation transfer functions optical design lens design Fringe analysis Imaging arrays Imaging devices Scanners

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RELUCTANT GLASS FORMERS AND THEIR APPLICATIONS IN lens design

RELUCTANT GLASS FORMERS AND THEIR APPLICATIONS IN LENS DESIG...

引用

5TH CONF ON current developments IN optical design AND optical engineering

作者： JOHNSON, RB CHEN, F ETHRIDGE, EC Univ. of Alabama in Huntsville (United States) NASA/Marshall Space Flight Ctr. (United States)

ISBN: (纸本)0819406554

Recently, a group of glasses has been investigated that have high refractive index and low dispersion. These glasses are known as reluctant glass formers and lie in the "forbidden" region of the conventional glass map. Research is continuing to develop means and techniques to produce usable sizes and optical characteristics. Since these glasses have unusual optical properties, a study was performed to gain an understanding of the impact such glasses could have on optical design and to establish desired baseline optical properties as objectives for the material scientists. Several generic optical configurations were explored to determine if a meaningful improvement could be realized. Study results are presented and discussed to illustrate that a notable enhancement in optical performance is attainable.

关键词： Glasses lens design optical design Refractive index Information operations optical properties Crown glass Refraction Crystals Objectives

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