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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 considerations and performance characteristics of AirSentinel®, a new UV-LIF bio-aerosol threat detection trigger

Design considerations and performance characteristics of Air...

引用

optically Based Biological and Chemical Sensing, and optically Based Materials for Defence

作者： Defreez, Richard Merrill, Ezra Albanna, Sam Davis, Bert Call, Charles MesoSystems Technology 1001 Menaul Blvd. NE Albuquerque NM 87107 United States

AirSentinel&reg is a new low cost, compact ultraviolet-based light induced fluorescence (UV-LIF) bio-aerosol threat detection trigger. Earlier UV-LIF triggers, for example, FLAPS, BARTS, BAWS, Bioni, and BioLert, ... 详细信息

AirSentinel® is a new low cost, compact ultraviolet-based light induced fluorescence (UV-LIF) bio-aerosol threat detection trigger. Earlier UV-LIF triggers, for example, FLAPS, BARTS, BAWS, Bioni, and BioLert, have used UV laser sources to induce fluorescence of biological aerosols. Two recent developments from the DARPA MTO SUVOS program, BAST and TAC-BIO, use UV LEDs for the same purpose, thereby broadening the term UV-LIF to mean laser or LED induced autofluorescence. All of these earlier triggers interrogate aerosols on a particle-by-particle basis on-the-fly. The major trade-off for these instruments is cost, size, and complexity versus counting efficiency (probability of detection) with the lower size end of the respirable range being most difficult to detect, AirSentinel® employs a different approach to UV-LIF detection: aerosol concentration by collection on a surface, surface interrogation, and surface rejuvenation prior to repeated concentration and interrogation cycles. Aerosol particle concentration via impaction on a surface addresses the issue of small particle counting efficiency since the fluorescence from the sum of the particles is the sum of the fluorescence signals from the collected particles, typically hundreds or thousands in number. Surface interrogation for a LIF signal is accomplished by illumination with a 280 nm and/or a 365 nm LED. As expected, test results show better relative detection performance using 280 nm excitation LEDs for bio-toxin simulants and somewhat better performance at 365 nm for standard Bacillus globigii spore targets. AirSentinel® beta technology is currently in long term testing in a number of public and other government buildings.

关键词： Aerosols

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Proceedings of SPIE - The International Society for optical engineering - current developments in Lens design and optical engineering

Proceedings of SPIE - The International Society for Optical ...

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current developments in Lens design and optical engineering V

The proceedings contain 40 papers from the Proceedings of SPIE - current developments in Lens design and optical engineering V. The topics discussed include: small catadioptric microscope optics;visible-NIR imaging optics for a Fourier transform spectrometer;optical design and analysis of a polarimeter for space applications;novel faceted mirror for pushbroom IR sensor;variable-focus liquid lens for portable applications;improving efficiency of beam splitter for DVD pickup;near infrared (NIR) achromatic phase retarder;passive fiber chip coupling of polymer PLC devices using hot embossing technique;optical state estimation using wavefront data;and temporal stability and performance of MR polishing fluid.

关键词： optical design

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Unique aspects of designing & tolerancing an optical testing system

Unique aspects of designing & tolerancing an optical testing...

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Conference on current developments in Lens design and optical engineering V

作者： Hadaway, JB Reardon, PJ Univ Alabama Ctr Appl Opt Huntsville AL 35899 USA

ISBN: (纸本)0819454613

The design & tolerancing of an optical testing system (OTS) presents a unique set of challenges not generally encountered during the typical optical design process. The authors have spent the past six years developing and using a series of optical systems designed to measure the surface figure & radius-of-curvature of various ultra-lightweight mirrors at 30 K. These mirrors were part of a technology development program to support NASA's James Webb Space Telescope (JWST). The design of these systems required consideration of the following: (i) potentially large figure errors in the test mirror (due to gravity sag & cryo-distortion), (ii) cryo-shrinkage of the aperture and radius-of-curvature, (iii) figure changes due to the use of mirror actuators, and (iv) vibration between the OTS & the test mirror. In addition, an exhaustive tolerancing process was required for each system in order to reach a set of alignment tolerances that were achievable using the equipment available and within the test environment. The authors found many aspects of the OTS design process to be significantly different from the norm;at the same time, however, viewing the process as a typical optical design problem often-times brought clarification. This paper will describe both the differences and the similarities observed between the design of an OTS as opposed to a traditional imaging system.

关键词： optical design tolerancing optical testing cryogenic

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Visible-NIR imaging optics for a Fourier transform spectrometer

Visible-NIR imaging optics for a Fourier transform spectrome...

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Conference on current developments in Lens design and optical engineering V

作者： Thibault, S Reecht, M Lavigne, JF Desnoyers, N INO Opt Design & Optomech Grp St Foy PQ Canada

ISBN: (纸本)0819454613

We present details of optical design, opto-mechanical design and testing of a visible-NIR imaging optical system for a Fourier transform spectrometer dedicated to astronomical application at the Mont Megantic Observatory (Observatoire du Mont Megantic, OMM, located south Quebec city, Canada). design considerations as well as testing and experimental results are presented.

关键词： astronomical instrumentation optical design opto-mechanical design imaging Fourier transform spectrometer

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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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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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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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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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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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