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current developments in optical design and engineering VI Conference

作者： Chao, SH Evans, NC Shealy, DL Johnson, RB Hualien Teachers College (Taiwan) Univ. of Alabama/Birmingham (United States) Optical ETC Inc. (United States)

ISBN: (纸本)0819422517

A differential equation method is applied to the design of a three-mirror telescope. The resulting system is mostly free of spherical aberration, coma and astigmatism. From caustic theory and a generalization of the Coddington Equations, the Abbe sine condition and the constant optical path length condition, three coupled differential equations, one for each reflecting surface, are generated. A system which satisfies these conditions will have a high resolution over a wide field of view. Analysis of this application is presented as a comparison to a similar three-mirror telescope system produced by conventional optimization techniques.

关键词： telescope coddington reflecting mirror wide field aplanatic abbe sine anastigmatic differential equations

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Characterization of Feathering of optical Coating

Characterization of Feathering of Optical Coating

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Conference on current developments in Lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Buchholz, Chris Krevor, David Rockwell Collins Heads Up Guidance Syst HGS Wilsonville OR 97070 USA

ISBN: (纸本)9780819482822

This paper discusses a method to characterize feathering and determine feathering quality. The characterization is based upon the change of the color coordinate across the transition region. "Feathering" of an optical coating is the gradual taper, without any discernible boundary, from a coated to uncoated region. There can be various reasons why a thin film optical coating may not be applied to the entire surface of a see-through article. Feathering is necessary when the viewer, looking through a transmissive element, is focused on the far-field and would be distracted by a coating boundary which redirects focus to the near field. Done incorrectly, feathering may produce visible artifacts which are ineffective and objectionable to the user. Examples are provided.

关键词： optical coating beamsplitter feather feathering display combiner color coordinate taper

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General formula for aspheric collimator lens design free of spherical aberration 20

General formula for aspheric collimator lens design free of ...

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Conference on current developments in Lens design and optical engineering XX

作者： Gonzalez-Acuna, Rafael G. Gutierrez-Vega, Julio C. Tecnol Monterrey Photon & Math Opt Grp Monterrey 64849 Mexico

We present the general formula to generated aspheric collimator lens free of spherical aberration and astigmatism. The presented formula describes the second surface of the aspheric singlet such as it correct the sphe... 详细信息

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

关键词： optical design aspheric collimator

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A SIMPLIFIED NON-GAUSSIAN APPROACH TO DIGITAL optical RECEIVER design WITH AVALANCHE PHOTODIODES - THEORY

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JOURNAL OF LIGHTWAVE TECHNOLOGY 1991年第8期9卷 1019-1026页

作者： CONRADI, J ALBERTA TELECOMMUN RES CTR EDMONTON T6E 5Y4ALBERTACANADA BELL NO RES OTTAWA K1Y 4H7ONTARIOCANADA

A simplified theory of avalanche photodiodes receiver sensitivity is presented in which the non-Gaussian nature of the avalanche multiplication process is taken into account. The theory predicts more accurately than a Gaussian theory the optimum avalanche gain and decision threshold and gives simple results for the influence of background photocurrent or dark current on receiver sensitivity, optimum gain, and threshold.

关键词： optical receivers Bit error rate optical modulation Gain measurement Noise measurement Gaussian noise optical noise Silicon Avalanche photodiodes Probability distribution

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design EXAMPLES OF HYBRID REFRACTIVE-DIFFRACTIVE LENSES

DESIGN EXAMPLES OF HYBRID REFRACTIVE-DIFFRACTIVE LENSES

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CONF ON current developments IN optical engineering AND COMMERCIAL OPTICS

作者： FOO, LD CLARK, SP MERCADO, RI Lockheed Missiles and Space Company Inc. (United States)

ISBN: (纸本)0819402044

Diffractive lenses have recently become realizable elements in optical systems. However, their application to wide band optical imaging systems are limited because they are highly dispersive and exhibit unacceptable amounts of color related aberrations. In this paper we will present a design study of the achromatization of hybrid refractive-diffractive lenses over wide spectral bands. design examples of hybrid lenses which operate in the visible, mid-infrared (3 - 5 micron) and long-wave infrared (8 - 12 micron) spectral bands will be presented and a comparison with conventional lenses designed to operate in these spectral bands will be discussed.

关键词： Mirrors Lenses Monochromatic aberrations Fluctuations and noise optical components Silicon Glasses Potassium Visible radiation Infrared radiation

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Passive athermalization of MWIR optical designs utilizing different infrared optical materials 23

Passive athermalization of MWIR optical designs utilizing di...

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Conference on current developments in Lens design and optical engineering XXIII Part of SPIE Optics and Photonics Conference

作者： Kucukcelebi, Doruk Aydemir, Sukru Emre Roketsan Kemalpasa Mahallesi Sehit Yuzbasi Adem Kutlu Soka TR-06780 Ankara Turkey

ISBN: (纸本)9781510654198;9781510654181

In this paper, different optical designs, which are composed of different MWIR optical materials, are utilized for passive athermalization and their performance in athermalization are analyzed. The optical designs are carried out by preserving the athermal property as well as keeping the image quality at higher levels within the working temperature between -40 degrees C and +60 degrees C. The passive athermalization process begins with the calculation of athermalization conditions of candidate material properties. By considering these conditions, athermal material pairs are chosen. To reduce optical aberrations, aspherical surfaces are utilized during the optimization process. At the end of the design phase, the performance of different configurations of athermal optical material pairs, which are enclosed by aluminum alloy housing material, are presented.

关键词： Athermalization infrared optical design optical material pair Mid Wave Infrared (MWIR)

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Analytic formulation of a spherochromatic collimator lens 11

Analytic formulation of a spherochromatic collimator lens

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Conference on current developments in Lens design and optical engineering XXI

作者： Gonzalez-Acuna, Rafael G. Gutierrez-Vega, Julio C. Tecnol Monterrey Photon & Math Opt Grp Monterrey Mexico

We introduce a closed-form formula to design a spherochromatic collimator singlet lens. The light for three different wavelengths is collimated at the output of the lens. We test the singlet lens using ray-tracing met... 详细信息

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

关键词： optical design aspheric collimator

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NEW-TYPE PSEUDORANDOM POSITION optical ENCODER WITH SUBMICROMETER RESOLUTION - design AND CHARACTERIZATION 4

NEW-TYPE PSEUDORANDOM POSITION OPTICAL ENCODER WITH SUBMICRO...

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Conference on current developments in optical design and optical engineering IV

作者： DURANA, M MILES, R ROBERT, P SWISS FED INST TECHNOL INST METROLDEPT ELECT ENGNCH-1015 LAUSANNESWITZERLAND

ISBN: (纸本)0819415871

The characteristics of a new twin-track absolute position optical encoder are presented. One track containing a pseudorandom code and the second a periodic pattern are synchronously engraved on a glass slab. The optical reading head design composed of a LED, a gradient index lens and a linear CCD array, with simple intensity-based signal processing to read the code pattern is described in detail. This design is combined with a standard Moire method to enhance resolution. Performance enhancement of the optical reading head is studied in terms of track illumination versus code density, detector geometry versus the lens point-spread function (Airy disk);and reduction of extrinsic spatial noise by the application of thick films. Each parameter was considered in terms of the optimal field of view and depth of field of the system. © 1994 SPIE. All rights reserved.

关键词： ABSOLUTE POSITION ENCODERS PSEUDORANDOM CODES optical MEASUREMENTS INSTRUMENTATION

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optical design of athermalised dual field of view zoom lens in long wave infrared (8μm-12μm) spectral band using benefits of paraxial optics 17

Optical design of athermalised dual field of view zoom lens ...

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Conference on current developments in Lens design and optical engineering XVII

作者： Kucukcelebi, Doruk Roketsan TR-06780 Ankara Turkey

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

This paper presents a methodology for designing an athermalised dual field of view zoom lens in long wave infrared (8 mu m - 12 mu m) spectral band by using the benefits of paraxial optics. By using this design methodology the optical designer can develop many types of complex optical systems in a straightforward way. The key feature of this design methodology relies on utilization of paraxial optics for defining the initial positions of the optical elements. The optical design is based on moving a single lens for changing the optical system's FOV thereby reducing the number of moving parts and simplifying the assembly procedure of the system. The optical design begins with optimization process using paraxial optics. Then the optical design using paraxial optics is used as a template for designing the final optical system by lens material selection for compensating the shift in system's focus due to thermal effects and lens thickness tuning.

关键词： Dual FOV optical design paraxial optics athermalization Long Wave Infrared (LWIR)

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DISCUSSION OF REFLECTION MICROCIRCULATION MICROSCOPE design

DISCUSSION OF REFLECTION MICROCIRCULATION MICROSCOPE DESIGN

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CONF ON current developments IN optical engineering 4

作者： ZHENG, DY CHEN, RY GE, ZF JING, FQ HU, WF WANG, BM Zhejiang Univ. (China) Hangzhou Traditional Chinese Medicine Hospital (China)

ISBN: (纸本)0819403954

Reflection microcirculation microscope has wide application value in studyiny microcirculation and microrheology , and joining with different equipment can do many ways of the studies , So research and improvement the instrument and development advanced appendant technology will produce a active sence to the study of biomedicine. In this paper , We introduce mainly the design idea of reflection microcirculation microscope which was studied by us ,and discuss some prombles.

关键词： Microscopes Objectives Blood Capillaries optical engineering Organisms Photography Illumination engineering Image analysis Image transmission

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