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design and fabrication of microlens by microfluidic deposition method

Design and fabrication of microlens by microfluidic depositi...

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conference on current developments in lens design and optical engineering V

作者： Chen, CT Chiu, CL Horng, JB Ind Technol Res Inst Optoelect & Syst Labs Hsinchu 741 Taiwan

ISBN: (纸本)0819454613

The paper presents a new processing method for design and fabrication of microlens by microfluidic deposition, in which the lenses can be formed on the media with high precise location in the fabrication process. First we may apply physical vaporization deposition (PVD) or spin coating to fabricate a thin film;secondly, the hydrophilic pattern specified by the mask of lenses can be created by photolithography, where the special lens media is made herein. Finally, the liquid solution of lens material is deposited onto the predetermined location of the lens media by the drop-on-demand fluidic actuator;thus, the microlenses are consequently formed after the complete evaporation of solvent in the solution.

关键词： microlens fabrication microfluidic deposition ink-jet

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Small catadioptric microscope optics

Small catadioptric microscope optics

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conference on current developments in lens design and optical engineering V

作者： Shafer, DR Chuang, YH Armstrong, JJ David Shafer Opt Design Fairfield CT 06430 USA

ISBN: (纸本)0819454613

New catadioptric objectives have been developed with large bandwidths in the DUV, high numerical apertures (NAs), and small size. This can be achieved using a single glass material. designs are specifically optimized for loose alignment tolerances and ease of manufacturability. Applications include broad band DUV imaging and high resolution immersion imaging for industrial microscopy and life sciences.

关键词： catadioptric DUV broadband microscope objective

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Saddle points in the merit function landscape of systems of thin lenses in contact

Saddle points in the merit function landscape of systems of ...

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conference on current developments in lens design and optical engineering V

作者： Bociort, F Serebriakov, A van Turnhout, M Delft Univ Technol Opt Res Grp NL-2628 CJ Delft Netherlands

ISBN: (纸本)0819454613

The merit function landscape of systems of thin lenses in contact, which are perhaps the simplest possible types of optical systems, shows remarkable regularities. It is easier to understand how the optimization parameter space of these simple systems is divided into basins of attraction for the various local minima if one focuses on the (Morse index 1) saddle points in the landscape rather than on the local minima themselves. The existence and the basic properties of these saddle points can be predicted by thin-lens theory, which is applied on a simplified model of the merit function containing only third-order spherical aberration. The predictions of this simplified model are confirmed by numerical results obtained with a typical merit function based on ray tracing.

关键词： global optimization saddle points thin lens theory spherical aberration optical system design

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optical state estimation using wavefront data

Optical state estimation using wavefront data

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conference on current developments in lens design and optical engineering V

作者： Redding, D Sigrist, N Lou, JZ Zhang, Y Atcheson, P Acton, S Hayden, W CALTECH Jet Prop Lab Pasadena CA 91109 USA

ISBN: (纸本)0819454613

The use of wavefront measurements to deduce the state of multiple optics in a telescope beam train - their misalignments and figure errors - can be confused by the fact that there are multiple potential sources for the same measured error. This talk applies Kalman filtering techniques as a tool for separating true telescope errors from artifactual testing errors in the alignment and testing of NASA's James Webb Space Telescope, a large segmented-aperture cryogenic telescope to be launched after 2010.

关键词： optical testing segmented mirror space telescope. wavefront control wavefront sensing state estimation

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Ultra-fast focal reducer design for ∼2m-class telescopes

Ultra-fast focal reducer design for ∼2m-class telescopes

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conference on current developments in lens design and optical engineering V

作者： Beach, D Appl Phys Ltd Christchurch 8153 New Zealand

ISBN: (纸本)0819454613

An ultra-fast focal reducer design originally intended for use with spherical primary mirrors (published in optical engineering, February, 2003), has been adapted for use as a retro-fit for existing telescopes of similar to2m pupil diameter that have aspheric mirrors. The focal reducer has only one aspheric surface, located at the aperture stop, and can provide speeds up to f/0.75 while maintaining a wide field with pixel-limited resolution and a broad spectral passband. Examples have been computed for Ritchie-Chretien, Dall-Kirkham and Cassegrain systems, and for use at the prime focus of mirrors with non-zero conic constants.

关键词： focal reducer high speed high resolution wide angle broad spectral passband retrofit telescopes

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Development of fast camera objective for spectrograph of Mont Megantique telescope

Development of fast camera objective for spectrograph of Mon...

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conference on current developments in lens design and optical engineering V

作者： Thibault, S Wang, M Bernier, S INO Opt Design Grp St Foy G1P 4S4 PQ Canada

ISBN: (纸本)0819454613

A fast (F/1.55) and wide-angle refractive camera objective has been developed to work with a large-size CCD on the focal plane of the spectrograph of Mont Megantique telescope for large spectral coverage from UV to VIS and up to NIR. The novel camera objective has been designed and optimized with three different glass combinations in order to have higher throughputs for large spectral coverage, especially in UV region. The tolerance analysis of the camera objective is given in the paper. The final opto-mechanical design of the objective is discussed with the consideration of the manufacturing tolerance in the optical and mechanical parts, as given in this paper. The used components have been minimized to reduce the light inherent lost. The optical testing results displayed the good optical performance of the camera with the required resolution for the whole FOV, as predicted by the optical simulation and computation. The broadband AR coating, enhanced on UV region, have been used on each surface of the lenses in the optical system.

关键词： optical engineering fast spectrograph camera opto-mechanical design astronomical instrumentation

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design and realization of an innovative mount for calcium fluoride space optics

Design and realization of an innovative mount for calcium fl...

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conference on current developments in lens design and optical engineering V

作者： Torrington, GK Clingan, DE Baker, RBM Montoya, MM Macke, BT Sandia Natl Labs Albuquerque NM 87185 USA

ISBN: (纸本)0819454613

Calcium fluoride is a desirable material for optical design of space systems in the ultraviolet, visible, and infrared bands. Modem calcium fluoride materials fabricated for the photolithography industry are highly resistant to space radiation. The wide wavelength band and low dispersion are also desirable properties. Unfortunately, calcium fluoride has a host of significant material property issues which hinder its use in the space environment. Low hardness, susceptibility to thermal and mechanical shock, and large coefficient of thermal expansion present significant challenges during development of opto-mechanical designs. Sandia National Laboratories Monitoring Systems and Technology Center has fielded a calcium fluoride based optical system for use in space. The Sandia design solution is based upon a spring-loaded mount which uses no volatile organic compounds. The theory of the Sandia solution is developed and design rules are presented. The Sandia design solution is illustrated for a specific example. Example design and margin calculations are shown. Finally, lessons learned from our design realization and qualification testing efforts are shared for the benefit of the community.

关键词： calcium fluoride space lens mount spring

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Procedures for speeding up the exact evaluation of diffraction integrals by semiperiodic-zone division of the integration domain

Procedures for speeding up the exact evaluation of diffracti...

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conference on current developments in lens design and optical engineering V

作者： Ferré-Borrull, J Bosch, S Dept Engn Elect Elect & Automat E-43007 Tarragona Spain

ISBN: (纸本)0819454613

We develop a method for the calculation of the integrals arising in the diffraction theory of aberrations. This method is developed from in a previous one based in the division of the diffracting aperture in semiperiodic zones, which enabled the exact calculation of the Point-Spread Function of an optical system. By a careful analysis of the integration process and of the properties of the semiperiodic zones, we develop a set of formulae that give an approximate value of the result of the diffraction integrals. This permits to avoid the numerical calculation of the integrals, which is a computationally intensive procedure and enables a substantial reduction of the computation times. The method has been tested on aberration-free optical systems and real optical systems and has shown a good accuracy, although some minor problems require further investigation.

关键词： point-spread function diffraction theory of aberrations optical system evaluation calculation methods

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Requirements and limitations for fast numerical calculation of the PSF of imaging systems

Requirements and limitations for fast numerical calculation ...

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conference on current developments in lens design and optical engineering V

作者： Bosch, S Ferré-Borrull, J Gómez-Morales, F Univ Barcelona Dept Fis Aplicada & Opt E-08028 Barcelona Spain

ISBN: (纸本)0819454613

Many practical approaches have been developed for computing the point spread function (PSF) of imaging systems and the subject has been extensively studied for many years, since this has been a classical topic in OptiCs-6. In recent times, the exact numerical calculation of the diffraction integrals and, hence, of the PSF of image forming systems has been successfully addressed(7-10). These methods are based on the determination of the critical points and the semi-periodic zones of the integrand on the plane of the aperture, followed by the summation for each of the zones. In the present work we address a comparison between an approximate calculation method based on the classical approach and the cited exact numerical procedures, mainly regarding the required computational effort involved.

关键词： point-spread function diffraction theory of aberrations optical system evaluation calculation methods

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Diffraction efficiency evaluation of diffractive optical element (DOE) aberration corrector

Diffraction efficiency evaluation of diffractive optical ele...

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conference on current developments in lens design and optical engineering V

作者： Shen, MZ Huang, RH Chinese Acad Sci Inst Opt & Elect Chengdu 610041 Peoples R China

ISBN: (纸本)0819454613

A new way to evaluate the diffraction efficiency of the diffractive optical element (DOE), which serves as an aberration corrector in an infrared hybrid optical system, is proposed. The directly measured ensquared energy of the hybrid optical system is obtained through an experimental test. Then, the actual line spread function (LSF) of the system under test is measured, and the point spread function (PSF) is calculated from LSF based on the symmetric property of the system. The PSF is used to calculate the so-called derived ensquared energy. The ratio of the directly measured and the derived ensquared energy, defined as the diffraction efficiency of the DOE, represents the fraction of the energy focused onto the image point over the total input energy on the image plane, because the energy loss is caused by the scattering from the DOE corrector. The hybrid optical system, experimental setup, evaluation procedure, and the final results will be presented.

关键词： diffraction efficiency diffractive optical elements hybrid optical system radiometric measurement optical test infrared optical system

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