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design CONSIDERATION OF CHINESE LONG BASE-LINE STELLAR INTERFEROMETER

DESIGN CONSIDERATION OF CHINESE LONG BASE-LINE STELLAR INTER...

引用

CONF ON current developments IN optical engineering 4

作者： ZHAO, PQ ZHOU, BF Acad Sinica Research Cent for Astronomical Instruments Nanjing China

ISBN: (纸本)0819403954

Many fundamental astronomical problems need much higher resolution than is afforded by atmospheric visibility or the diffraction limit of even the largest telescope being planned. The only way to meet these demands is by a distributed array of telescopes similar to those used in radio astronomy, or the long baseline stellar interferometry. China is planning to build a small-aperture long- baseline stellar optical interferometer for three purposes. One purpose is to clear up some problems before building a large and expensive interferometer. The second is to measure angular diameters of stars and angular distances between double stars. The third is to modify it for astrometry use in the future. In this paper, the design tolerance and specifications of the interferometer are discussed based on the astronomical requirements.

关键词： Interferometers

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design AND FABRICATION OF HIGH DAMAGE THRESHOLD TURNING MIRRORS FOR THE NOVA LASER

DESIGN AND FABRICATION OF HIGH DAMAGE THRESHOLD TURNING MIRR...

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CONF ON current developments IN optical engineering 4

作者： WOLFE, CR KOZLOWSKI, MR MARCHI, FT RAINER, F ENEMARK, E Lawrence Livermore National Lab. (United States) Optical Coating Lab. Inc. (United States)

ISBN: (纸本)0819403954

Laser induced damage to optical components severely limits the operating fluence of high peak power lasers used for fusion research such as the Nova laser at the Lawrence Livermore National Laboratory. In particular, surfaces and optical thin films often damage at a lower fluence than bulk materials in large aperture, high quality optics. We have designed and are fabricating new 94 cm turning mirrors for Nova as part of the "Precision Nova" program to improve beam quality. A new design has been optimized for updated optical performance specifications including increased damage resistance. The new mirror design will operate at all turning angles required by the ten Nova beamlines. This flexibility reduces mirror inventory and fabrication cost. A process of "conditioning" the mirror coating has been developed that is permanent and increases the damage threshold by as much as a factor of 2-3x.

关键词： Mirrors Laser damage threshold Coating Reflectivity Raster graphics Thin films optical engineering Laser induced damage Multilayers Objectives

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current developments in optical engineering iv

Current Developments in Optical Engineering IV

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current developments in optical engineering iv

The Proceedings of the conference contains 27 papers representing the very latest developments in the optical and optical engineering subject areas not covered in the other conferences at the annual San Diego meeting. This Proceedings includes papers on basic optical design and engineering, e.g. the optomechanical laboratory hardware, its organization, terminology and devices;a precision dual positioning system;a Wollaston polarizer in imaging systems;a 20-element long focal length zoom lens;photolithographic lenses;a reflection microcirculation microscope. The session on optical fabrication and testing includes papers on computer simulation of interferometer performance;adaptive optics wavefront corrector using addressable liquid crystal retarders;microlens array manufacture;design of Shack-Hartmann plate with GRIN rod lenses;Chinese adaptive astronomical telescope. The session on waveguide and diffractive optics and microlithography comprises papers on the fabrication of ion-exchanged glass channel waveguides with etched and diffused grating taps;modular fiber optic assembly technique;forward photorefractive multibeam mixing in BaTiO3;correcting chromatic aberration in holographic optical systems. Miscellaneous topics include articles on optomechanical properties of PMMA and their applications in pressure sensors and on a Fabry-Perot tunable filter for visible and near IR using nematic liquid crystals.

关键词： optical Systems

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FABRY-PEROT TUNABLE FILTER FOR THE VISIBLE AND NEAR IR USING NEMATIC LIQUID-CRYSTALS

FABRY-PEROT TUNABLE FILTER FOR THE VISIBLE AND NEAR IR USING...

引用

CONF ON current developments IN optical engineering 4

作者： BONACCINI, D CASINI, L STEFANINI, P Osservatorio Astrofisico di Ar (Germany) Osservatorio Astrofisico di Arcetri (Italy) Osservatorio Astrofisico di Ar (Italy)

ISBN: (纸本)0819403954

A nematic liquid crystal Fabry-Perot interferometer (NLC-FPI) based on nematic material in a parallel configuration is described, for applications in astronomy. This device allows spectral chopping for an efficient removal of background radiation, when the source is embedded in a strong background such as the solar corona or IR sources. The primary design is intended for two-dimensional spectroscopic imaging. This method is also very useful for precision spectropolarimetry. The NLC-FPI is a tunable, double-channel filtec we present some theoretical and experimental results obtained on a first generation pmtotype.

关键词： Fabry–Perot interferometers Refractive index Liquid crystals Prototyping optical engineering Molecules Reflectivity Crystals Polarization Tunable filters

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design OF SHACK-HARTMANN PLATE WITH GRIN ROD LENSES

DESIGN OF SHACK-HARTMANN PLATE WITH GRIN ROD LENSES

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CONF ON current developments IN optical engineering 4

作者： ZHAO, PQ ZHOU, BF Acad Sinica Research Cent for Astronomical Instruments Nanjing China

ISBN: (纸本)0819403954

The Shack-Hartmann (S-N) wavefront sensor, which is derived from the classical Hartmann testing method, is one of the most convenient methods available for the optimal testing of telescopes on site on natural stars. It also has many applications in adaptive optics, active optics and CAM of optical mirror. The principle of the method is explained. Light from the tested source and from a reference source is collimated by a lens and incides upon an S-H plate which is a lens array. Each lenslet forms two point images. The distance between each pair of images reflects the angular aberration of the tested wavefront over the subaperture. A method of producing S-N plates with GRIN rod lenses is described. The experimental S-H plate has 10x10 GRIN rod lenses.

关键词： Image Sensors

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PHASE QUANTIZATION AND DISCRETIZATION IN DIFFRACTivE OPTICS

PHASE QUANTIZATION AND DISCRETIZATION IN DIFFRACTIVE OPTICS

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CONF ON current developments IN optical engineering 4

作者： GOLUB, MA SISAKJAN, IN SOIFER, VA Central Design Institute of Un (Israel) Central Design Institute of Un (Russia) Central Design Institute of Unique Instrumentation (Russia)

ISBN: (纸本)0819403954

Theoretical description of phase discretization and quantization is provided for coaputer generated optical eleients (CGOK). Suitable estiiations of seanaquared and iaxiaui aberrations, Strehl nuaber and aean wavefront deviation are derived in dependence of discretization and quantization paraieters. A diffractive aberration corrector for thin len5 and also phase diffractive coipensator for aspheric wavefront foriation are investigated as exasples, 1 . PROBLEM OF CGOE D ISCRETI ZAT ION AND QUANTI ZAT ION. Wide-range possibilities of coaputer generated holograis and optical eleients1' are soietiies liiited by discretization of their phase transfer function. The known aethods for studying phase nonlinearities treat quantization as a superposition of iany diffraction orders but do not take discretization into account. In this paper coibined studying of discretization and quantization is perforied for siooth phase functions such as of zoned phase plates, coipensators, Fresnel lenses and siiilar type CGOK. Digital holography applications provide us coiputer generated optical elesents including kinoforis' with purely phase-type t'ransfer function r (t) exp{***25rrrt (p(a)] (1) where • : (u,v) are 2-D Cartesian coordinates in the CGOI's plane, 'f (ii) is the phase shift perforied in point IT, iod2,,,tf ) is the value of 'p the aodulo (2ira), 1:1 or another positive nuiber. Coiputer-aided design of CGOK includes calculation of digital saiples for 'P function brought to [O,2%a) interval, driving suitable nak generator to access grey-level or binary iasks. Grey-level iasks used in bleaching or photopolyaer technology yield a CGO with variable iicrorelief thickness. optical lithography with a set of binary aasks or iulti-stepped electron-beaw lithography yields aulti-level COOK described by quantization of 'P . Raster scanning iask generator set up all saska iI the field G fros so called resolution cells G7that are centered in i;point, enuierated by dou

关键词： Quantization Wavefronts optical engineering Ions Raster graphics Spatial resolution Aspheric lenses Binary data Diffraction Phase transfer function

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Advances in optical Information Processing iv

Advances in Optical Information Processing IV

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Advances in optical Information Processing iv

ISBN: (纸本)0819403474

This conference proceedings contains 41 papers arranged in five sections. Section 1 reviews ongoing research in optical processing including recent results in optical correlator, optical computer photorefractive, and spatial light-modulating device research. Section 2 deals with new developments in filter design, particularly phase-only filters and experimental filter implementations. Section 3, covering optical processing is devoted primarily to new developments in 2D-optical signal processing systems for spectral analysis and range/doppler signal processing. Section 4 concerns acousto-optic spectrum analyzer systems and components. Section 5 deals with optical computing and presents various algorithms and architectures for computing.

关键词： optical Data Processing

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design of a twenty-element long focal length zoom lens

Design of a twenty-element long focal length zoom lens

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current developments in optical engineering iv

作者： Malone, Robert M. Frogget, Brent C. Grafton, David A. Mitchell, Frank R. EG&G Inc Los Alamos United States

An optical lens system with varying magnification has been designed for a 70-mm image format. Twenty optical elements were needed to provide for the 345- to 1050-mm focal length zoom range as well as the proper color correction over the visible spectrum. A 4-in diameter port window limits the fl# of the optical lens system. Operation of the lens system is done by actuating stepping motors through a MacPlus computer. This lens system was designed for Los Alamos National Laboratory Group M-8, because no commercial zoom lens existed that would change its reduction from 1/15 to 1/4 at a focusing range of 5 meters. Additionally, we required a larger, non-standard image size that could be recorded by a rotating mirror streak camera. A Nikkor lens sales manual does offer a long focal length, 35-mm lens only upon special order. The closest focusing range of this Nikkor lens is 6 meters.

关键词： Lenses

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WIN 3.5 meter telescope project

WIN 3.5 meter telescope project

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Advanced Technology optical Telescopes iv

作者： Johns, Matt Pilachowski, Caty Natl Optical Astronomy Observatories Tucson United States

ISBN: (纸本)081940280X

NOAO, in conjunction with the University of Wisconsin and Indiana University, is building a new 3.5 meter telescope on Kitt Peak, AZ, called the WIN telescope. This paper presents the basic concepts and current status of the WIN project. Recent developments in telescope, optical, and enclosure design are being incorporated into the WIN telescope and are described here. The WIN telescope is designed with a wide field of view to take advantage of recent advancements in multi-object, fiber-optic spectroscopy. A fiber positioner and spectrograph are under development as part of this effort. The enclosure uses a lightweight and well ventilated dome to minimize seeing. The primary mirror is the second of the 3.5 meter borosilicate honeycomb blanks cast in the Steward Observatory Mirror lab. The mirror is being polished in the NOAO optical Shop as part of the NOAO Future Telescope Technology (FTT) program. A new mirror support system is being developed which supports the primary mirror entirely from the back. The temperature of the mirror will be actively controlled.

关键词： Telescopes

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current developments IN optical engineering AND DIFFRACTION PHENOMENA.

CURRENT DEVELOPMENTS IN OPTICAL ENGINEERING AND DIFFRACTION ...

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current developments in optical engineering and Diffraction Phenomena.

This conference proceedings contains 26 papers covering the following major subjects: optical design, optical engineering and manufacturing optical systems and their applications and diffraction phenomena.

ISBN: (纸本)0892527145

关键词： optical SYSTEMS

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