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

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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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NON-POLARIZATION PARALLEL BEAMSPLITTER

NON-POLARIZATION PARALLEL BEAMSPLITTER

引用

CONF ON current developments IN optical design AND optical engineering 2

作者： XU, FY Shandong Architectural Engineering Institute (China)

ISBN: (纸本)0819409251

A little displacement polychromatic parallel non-polarization beamsplitter, which is composed of two elements, has been introduced in this article. It has been studied by theoretical analysis and experiment, and has been given the optimal structure. The displacement of the beamsplitter can be designed in need, which is about 1.0 - 3.0 mm. The polarization degree of the emergent light is below 1.2%, transmission is above 90%, transmission range is from 300 nm to 2500 nm. Its structure is simple, making convenient and loss low.

关键词： Polarization Beam splitters Calcite Wave plates Crystal optics Crystals Laser crystals Geometrical optics Polarizers Prisms

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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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LOW POLARIZATION ADJUSTABLE BEAMSPLITTING ANGLE PRISM

LOW POLARIZATION ADJUSTABLE BEAMSPLITTING ANGLE PRISM

引用

CONF ON current developments IN optical design AND optical engineering 2

作者： XU, FY Shandong Architectural Engineering Institute (China)

ISBN: (纸本)0819409251

Low polarization beamsplitter has been reported by article and patent in Applied Optics in 1983. Which structure is a quartz birefringent plate, it can be used to splite beam by using the reflection and refraction of the surface of the birefringent plate. In this article I have introduced a polychromatic adjustable beamsplitting angle low polarization prism, which is composed of four elements. I have studied it by theoretical analysis and experiment measurement. Whose character is: (1) the beamsplitting angle can be adjustable continuously, (2) transmission is high, (3) the intensities of the two beams are about equal, and, (4) the adjusting is convenient and reliable. Such as a 37 degree(s) prism, the beam splitting angle is from 15 degree(s) to 45 degree(s), transmission is above 85%, the maximum polarization degree of the emergent light is below 10%. The range of the beamsplitting angle can be designed in need.

关键词： Prisms Polarization Beam splitters Calcite Patents Quartz Reflection Refraction optical testing Refractive index

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STUDY ON QUARTZ DEPOLARIZER

STUDY ON QUARTZ DEPOLARIZER

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CONF ON current developments IN optical design AND optical engineering 2

作者： XU, FY Shandong Architectural Engineering Institute (China)

ISBN: (纸本)0819409251

In this article the emergence, development and present of depolarizer has been studied by me. Then I have studied the all quartz depolarizers existing presently. Such as single plate depolarizer, loyt depolarizer, single wedge depolarizer, right angle prism depolarizer, J.C. kremen double wedges depolarizer by theoretical analysis and experiment measurements. I have found when the polarization plane of the incident monochromatic light is unknown or frequently varies, the emergent light can not be depolarized completely by using all the existing depolarizers. According to this situation, I have invented a new type of double wedge depolarizer. I can depolarize the emergent light completely whether the polarization plane of the incident is known or frequently varies by using the new depolarizer. The polarization degree of the emergent light is below 1.0%, transmission ratio is above 90%.

关键词： Polarization Prisms Quartz Crystals Wave plates Dielectric polarization Light scattering Image quality Laser scattering Scattering

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TEMPERATURE AND AGE EFFECTS ON THE TEMPORAL STABILITY OF INVAR

TEMPERATURE AND AGE EFFECTS ON THE TEMPORAL STABILITY OF INV...

引用

CONF ON current developments IN optical design AND optical engineering 2

作者： STEELE, JM THOMPSON, DA JACOBS, SF BASS, DL Eastman Kodak Co. (United States) Optical Sciences Ctr./Univ. of Arizona (United States)

ISBN: (纸本)0819409251

A testing program was conducted to determine the long term temporal stability properties of sheet Invar. The tests were conducted at the University of Arizona's optical Sciences Center over a period of 9 months. Growth measurements were made using an interferometric optical technique at both ambient and elevated temperatures. Eleven specimen types, in groups of three, were included in the test. These data were combined with published historical data to establish an estimate to the long term behavior. It was found that Invar exhibits short term behavior with a rapid initial growth rate, 8 - 12 ppm/yr and time constant on the order of 100 days plus long term exponential growth at lower growth rates, 2 - 5 ppm/yr initial (end of year 1) with a three to eight year time constant. The parameters which most significantly effect Invar growth rate were found to be: time since final heat treatment; carbon content; heat treatment; and, ambient temperature.

关键词： Heat treatments Carbon Tunable lasers Data modeling Chemistry Copper Fabry–Perot interferometers Laser stabilization Signal detection Temperature metrology

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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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Generalized system design of electro-optical device parameters

Generalized system design of electro-optical device paramete...

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current developments in optical design and optical engineering ii

作者： Yakushenkov, Yuri G. Moscow Inst. of Surveying Aerophotography and Cartography Moscow RSFSR USSR

Main stages of electro-optical devices (EOD) energy calculation are presented. Generalized methodology of the energy calculation permits to find simply a set of important EOD parameters, for example, a threshold sensi... 详细信息

ISBN: (纸本)0819409251

关键词： Electrooptical devices

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SUPERRESOLUTION optical MICROSCOPE BY THE PHASE-SHIFTING LASER SPOTS

SUPERRESOLUTION OPTICAL MICROSCOPE BY THE PHASE-SHIFTING LAS...

引用

CONF ON current developments IN optical design AND optical engineering 2

作者： SHIMIZU, I TAKAHARA, Y KOSHIKIYA, Y AOTANI, S TOYODA, H Ibaraki College of Technology (Japan) Japan Synthetic Rubber Co. Ltd. (Japan) Hamamatsu Photonics K.K. (Japan)

ISBN: (纸本)0819409251

A new method for optical microscopy with super-resolution exceeding the Rayleigh limit was developed to observe the shape of particles contaminating the LSI patterned wafer in the far- field. The principle of the new method is as follows. The optical spot being smaller than the measured particles has to be scanned on the particle to measure the shape of particles on the wafer. The phase-shifting mask making small optical spot consists of the checkered mask which has been coated with a transparent layer patterned to ensure that the optical phases of the nearest apertures are opposite. The destructive interference between the two opposite phases of light waves from adjacent apertures cancels some diffraction effects and increases the spatial resolution, so that the size and resolution of the coherent laser spots can exceed the size limit of the Airy disk and resolution of Rayleigh limit. The new method for optical microscope with super resolution was examined theoretically and experimentally. The coherent beam generated from 15 mW He-Ne laser projected to the phase-shifting checkered mask forms small laser spots of which size are under 0.1 micrometers in diameter. It is clarified that in the far-field, the scattered light from two spots with opposite phases on the wafer can be observed in exceeding with Rayleigh limit.

关键词： Phase shifts optical microscopes Particles Semiconducting wafers Super resolution optical filters Light scattering Near field scanning optical microscopy optical resolution Photomasks

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Integration of a precision stereo microscope into an excimer-laser-beam delivery system

Integration of a precision stereo microscope into an excimer...

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current developments in optical design and optical engineering ii

作者： Yoder Jr., Paul R. Consultant in Optical Engineering Norwalk CT USA

We summarize the requirements for a stereoscopic microscope as part of an investigational excimer laser corneal sculpting apparatus, describe how a Zeiss surgical microscope was integrated into that apparatus and repo... 详细信息

ISBN: (纸本)0819409251

关键词： Laser beams

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