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

共 444 条记录，以下是381-390 订阅

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design study of a 2.2x zoom lens using plastic materials

Design study of a 2.2x zoom lens using plastic materials

引用

conference on current developments in lens design and optical Systems engineering

作者： Shi, WM Newell, MP Fischer, RE OPT 1 Inc Westlake Village CA 91362 USA

No abstract available.

ISBN: (纸本)0819437387

No abstract available.

关键词： Zoom lenses Distortion Glasses Aspheric lenses lens design Vignetting Chemical elements Cameras Plastic lenses Chromatic aberrations

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Positioning accuracy of primary mirror actuators for large aperture space based optical instruments

Positioning accuracy of primary mirror actuators for large a...

引用

conference on current developments in lens design and optical Systems engineering

作者： Hatheway, AE Alson E Hatheway Inc Pasadena CA 91101 USA

ISBN: (纸本)0819437387

This paper describes the Rubicon(tm) actuator, discusses its test data and derives from the data the actuator's accuracy function based upon the observed accuracy of long and short stroke motion commands. The accuracy is described in terms of the rms positioning error (in nanometers) for moves of a given size, regardless of position in the stroke.

关键词： actuator nanometer space instruments accuracy move error

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lens centering by using binary phase grating

Lens centering by using binary phase grating

引用

conference on current developments in lens design and optical Systems engineering

作者： Lu, ZW Weng, ZC Changchun Inst Opt & Fine Mech State Key Lab Appl Opt Changchun 130022 Peoples R China

ISBN: (纸本)0819437387

By using a binary phase grating, a lens centering system is constructed. In our system, the lens under alignment is mounted on a suitable mechanical axis that can be a spindle of precision lathe. A binary phase grating is used as a beam splitter. Laser beam after passing through the grating only +/- 1 orders are kept unstop, reflected back by lens surface, recombined by the same grating, and very good contrast interference fringes can be attained. When the lens together with the spindle is rotated, the interference fringes remain motionless only when the lens rotates around its axis of symmetry. If the lens rotates around an axis of asymmetry, the fringes will move. A CCD camera is used to monitor the fringes and transversal error less than a micrometer can be achieved. The interference fringes are very insensitive to vibration and environment. In the paper the theory are presented and the experimental results are given.

关键词： centering interference binary phase grating

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Eyepiece design with refractive-diffractive hybrid elements

Eyepiece design with refractive-diffractive hybrid elements

引用

conference on current developments in lens design and optical Systems engineering

作者： Yun, ZS Lam, YL Zhou, Y Yuan, XC Zhao, LP Liu, J Nanyang Technol Univ Sch Elect & Elect Engn Photon Res Grp Singapore S639798 Singapore

ISBN: (纸本)0819437387

Eyepieces are a part of visual optical systems. Because of their wide field of view and long eye-relief, it is difficult to further improve the existing eyepieces using all-refractive surfaces. Since diffractive elements demonstrate unique characteristics: negative dispersion and non-field curvature, the eyepiece design can be improved by using refractive-diffractive hybrid surfaces. In this paper, several design examples using refractive-diffractive hybrid surfaces to design moderate field of view (FOV) eyepieces were studied. Firstly, a design example using a diffractive surface to replace the negative piece in the cement doublet of a conventional Kellner type eyepiece is presented. Then a design example is given by employing two diffractive elements to replace the negative elements used in the conventional symmetrical eyepiece. For the above examples the eyepiece aberration correction techniques were also analyzed.

关键词： optical design lens design diffractive optics eyepiece

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Opto-mechanical design of primary mirror assembly for free gyro stabilized seeker

Opto-mechanical design of primary mirror assembly for free g...

引用

conference on current developments in lens design and optical Systems engineering

作者： Perona, BJ Yarbrough, C Prill, S Raytheon Missile Syst Co Tucson AZ 85710 USA

ISBN: (纸本)0819437387

In Free Gyroscopic Stabilized Seekers, the Primary Minor has the multiple functions of a magnetic rotor, the primary rotating mass and the primary reflector for the optical train. The introduction of rare-earth magnetic alloys to this class of seeker has provided increased flexibility in materials selection, opto-mechanical design and cost of manufacture. Along with superior magnetic properties, the rare-earth alloy Neodymium-Iron-Boron (NdFeB) comes with the undesirable properties of anisotropic CTE, high susceptibility to corrosion and manufacturing challenges. This paper discusses the opto-mechanical design, structural and optical modeling and analysis of a primary mirror assembly utilizing an NdFeB insert with centrifugal, linear acceleration and thermal loading as well as the optical test results, qualification testing of long-term figure stability and validation of the mechanical/magnetic/optical design model.

关键词： opto-mechanical design gyroscope rare-earth magnet

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Minimizing gravity sag of a large mirror with an inverted Hindle-mount

Minimizing gravity sag of a large mirror with an inverted Hi...

引用

conference on current developments in lens design and optical Systems engineering

作者： Robinson, DW NASA Goddard Space Flight Ctr Greenbelt MD 20771 USA

ISBN: (纸本)0819437387

A method of minimizing the optical distortion from gravity sag on a suspended large autocollimating flat mirror has been devised. This method consists of an inverted nine-point Hindle-Mount. A conventional Hindle-Mount is located underneath a sky-viewing mirror and is primarily under compression loads from the weight of the mirror. It is not suitable for the situation where the mirror is viewing the ground, since a mirror would tend to fall out of the mount when in an inverted position. The inverted Hindle-Mount design consists of bonded joints on the backside of the mirror that allow the mirror to be held or suspended above an object to be viewed. This ability is useful in optical setups such as a calibration test where a flat mirror is located above a telescope so that the telescope may view a known optic.

关键词： Hindle mount optical mounting techniques bonding epoxy cell

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Optimization and fabrication of micro diffractive lens arrays for biochip application

Optimization and fabrication of micro diffractive lens array...

引用

conference on current developments in lens design and optical Systems engineering

作者： Yang, R Pang, L Wu, MX Jin, GF Tsing Hua Univ Dept Precis Instrument State Key Lab Precis Measurement Technol & Instru Beijing 100084 Peoples R China

ISBN: (纸本)0819437387

In the latest ten years, great efforts have been taken to miniaturize the biochemical and chemical analysis systems, and many kinds of biochips with functions of biology sample preparing, chemical assay reacting and result detecting, or mixture of some of these functions have been reported. An aspherical micro lens array with large numerous aperture is developed for a biosensor to achieve high fluorescence collection and high sensitivity. The optimized design and fabrication with new organic-inorganic sol-gel materials of micro lens arrays are discussed in this paper. Because of merits of micro size, low cost, facility to reproduce, flexibility to design and multi-channels detection, these elements are suitable to form a compact, multi-channel fluorescence biosensor that can address multiple biology samples simultaneously without loss in detection sensitivity. Packaging and alignment strategies for a sensor consist of micro lens arrays detecting fluorescence labeled DNA assay arrays are also presented, which is promising to be integrated into a micro total analysis system (u-TAS).

关键词： micro lens arrays organic-inorganic sol-gel biosensor u-TAS

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optical design of SHASM: Segmented hexagon array solar mirror

Optical design of SHASM: Segmented hexagon array solar mirro...

引用

conference on current developments in lens design and optical Systems engineering

作者： Huegele, VB NASA George C Marshall Space Flight Ctr SOMTC Huntsville AL 35812 USA

ISBN: (纸本)0819437387

A segmented array of mirrors was designed for a solar concentrator test stand at MSFC for firing solar thermal propulsion engines. The 144 mirrors each have a spherical surface to approximate a parabolic concentrator when combined into the entire 17-foot diameter array. The mirror segments are aluminum hexagons that had the surface diamond turned and quartz coated. The array focuses sunlight reflected from a heliostat to a 4 inch diameter spot containing 8 kilowatts of power at the 15 foot focal point. The derivation of the surface figure for the respective mirror elements is shown. The alignment process of the array is discussed and test results of the system's performance are given.

关键词： segmented mirror array spherical approximation solar thermal propulsion solar power

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Calculation of diffraction in the presence of aberrations by numerical methods based on critical points and semi-periodic zones

Calculation of diffraction in the presence of aberrations by...

引用

conference on current developments in lens design and optical Systems engineering

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

ISBN: (纸本)0819437387

The numerical calculation of diffraction integrals in systems with aberrations is addressed from the point of view of a new geometrical interpretation of the diffraction phenomena. This interpretation is based on the division of the integration domain in semiperiodic zones that isolate the integrand oscillations. Moreover, the critical points of the aperture allow to identify the zones with a net contribution to the diffracted field. With the help of this interpretation it is possible to define methods for calculating the diffraction of a spherical wave incident on an aperture. We study the problems that arise when these methods have to be applied to waves in aberrated systems and we propose a solution based on the analysis of the behavior of the optical path of the wave incident on the exit pupil of the system.

关键词： diffraction integrals semi-periodic zones critical points aberrated optical systems

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Assessment, optimization, and tolerancing methods for visual instruments

Assessment, optimization, and tolerancing methods for visual...

引用

conference on current developments in lens design and optical Systems engineering

作者： Deslis, A Mouroulis, P Davidson Optron Inc W Covina CA 91790 USA

ISBN: (纸本)0819437387

A strategy for optimizing both the on-axis and the off-axis performance of coherently (directly) coupled visual instruments is presented. The strategy draws on the recently published body of data regarding the influence of various individual Seidel aberration and aberration combinations on subjective contrast sensitivity and resolution tasks, as well as studies on the correlation between subjective image quality and objective instrumental figures of merit. An MTF-based metric allows both optimization and tolerancing to be performed in a coherent manner that is based on experimental results of the effects of aberrations.

关键词： optimization visual systems optical design tolerancing MTF

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