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检索条件"任意字段=Current Developments in Optical Design and Engineering V"

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Scene-based sensor modeling using optical design software

Scene-based sensor modeling using optical design software

引用

Conference on current developments in Lens design and optical engineering vIII

作者： Fisher, John Brandywine Opt Inc Chester PA USA

ISBN: (纸本)9780819468154

The traditional approach to optical system engineering separates the scene, optics, and detector as static entities, optimizing the design to meet subsystem specifications of aperture, field size, encircled energy, read noise, dynamic range, and other electro-optical properties. The Scene-Based Sensor Model (SBSM) represents a different approach by simulating the scene, optics and detector as a cohesive model using commercially available optical ray-tracing software. The objects are modeled as temporally changing entities, with characteristics including reflectance, absorbance, fluorescence, and scattering. Likewise, the detectors are modeled with their properties of temporal noise, spatial non-uniformity, nonlinear gain, and offset drift. The end-to-end simulation produces "photons-to-bits" analysis applicable to a variety of optical systems. First results are illustrated with ray tracing simulation of moving fluorescent objects and laser induced breakdown spectroscopy.

关键词： optical system design ray-tracing simulation sensor model FRED optical design software Matlab

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High quality Uv - NIR thin film interference polarizers 15

High quality UV - NIR thin film interference polarizers

引用

Conference on current developments in Lens design and optical engineering Xv

作者： Novopashin, vladimir v. Shestakov, Alexsandr v. Polyus Res & Dev Moscow 117342 Russia

ISBN: (纸本)9781628412192

Interference polarizers can be successfully used in lasers and laser devices as independent optical element substituted crystal polarizers. Today, the use of crystal polarizers in some cases can lead to definite difficulties in accordance with peculiarities of laser cavity construction. The novel laser technologies and design of laser elements defined the new demands to optical coatings. In modern lasers interference polarizer can be considered as one of the main element that operates laser radiation. According to special optical outline and the requirements to optical characteristics of laser polarizers can be bryuster or mirror-type. The stable of spectral characteristic at a definite angle is one of the most important parameter. It was shown how optical thickness of each layer influence on angle stability. On the other hand high stable was achieved by using electron-beam ion assisted deposition. The coatings were deposited on the surface of optical glass BK-7 or quartz. Generally, refractory oxides were used. The achievement of the condensation layers structure was provided by active O-2(+) ions. It was shown, that smooth cleaning by neutral ions as before the evaporation definite separate layer, as after stabilized the optical properties of polarizer. Moreover, the using of ion source allowed increase laser damage threshold. It can be underline that some advantages of ion source revealed during evaporation materials in visible and especially ultra violet region. Also, laser strength was rather more at 1535 nm for ion-assisted deposited films. The average parameters were: minimum transmission efficiency T-P > 97%, extinction ratio T-P/T-S > 500, laser damage more than 10 J/cm(2), 10 nanosecond pulse at 1064 nm in laser spot 200 mu m.

关键词： interference polarizer electron-beam evaporation ion source laser strength ion-beam assisted deposition refractory oxides

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Investigation of superthin carbon layers and multilayer carbon structures by X-ray reflectivity measurements. 6

Investigation of superthin carbon layers and multilayer carb...

引用

current developments in optical design and engineering vI Conference

作者： Baranov, A Tereshin, S Mikhailov, I Pinegin, v Research Institute of Vacuum Technique (Russia) Science-Research Institute of Vacuum Technique (Russia) Kharkov State Polytechnic Univ. (Ukraine)

ISBN: (纸本)0819422517

In situ X-ray monitoring of reflectivity in the short range 0.05-0.3 nm for investigation of thin carbon layers and multilayer carbon structures is proposed. X-ray monitoring is based on periodical alternations of Fresnel's reflectivity when layer thickness increases or decreases. The source of X-rays with wavelength 0.154 MI was located out of working volume of installation and consisted of X-ray tube, monochromator block and collimating system. The objects of in-situ investigations were carbon films obtained by RF-plasma discharge and magnetron methods. Multilayer carbon structures were synthesized by alternating these layers. Density and microroughness of the growing film were determined for every half-wave of reflectivity oscillations that corresponds to averaging by the layer of 1.0 nm thickness. It is shown that X-ray monitoring system permits to control the layers thickness during multilayer structure growth with precision up to 0.1 nm.

关键词： x-ray monitoring system in situ amorphous carbon film multilayer structure application

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Wide angle lens with improved relative illumination characteristics 11

Wide angle lens with improved relative illumination characte...

引用

Conference on current developments in Lens design and optical engineering XXI

作者： Zhuang, Zhenfeng Dallaire, Xavier Parent, Jocelyn Roulet, Patrice Thibault, Simon Immervision 2020 UnivSuite 2320 Montreal PQ H3A 2A5 Canada Univ Laval Ctr Opt Photon & Laser Dept Phys Genie Phys & Opt 2375 Rue Terrasse Quebec City PQ G1V 0A6 Canada

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

Consumers nowadays have a higher expectation on cameras beyond the function of taking photos or videos. In the early years, the applications of cameras with lenses were, however, very restricted. A new generation of super wide-angle lenses capture the user's surroundings in full 360 degrees, allowing the user's friends or families to step inside our universe and experience it, live. However, for such wide angle lens coverage, the relative illumination of the lens must take the vector nature of the light into account. Consequently, the polarization of light becomes a critical parameter. Custom coatings are commonly spread on the lens surface to avoid light transmission polarization falloff. But for consumer applications, complex coating is not a practical solution because it raises cost. In this paper, we present how to take care of the polarization during the design and analysis of the lens design. Additionally, design tips are proposed to suppress the polarization impact.

关键词： 080.3620) Lens system design (120.4820) optical systems (260.5430) Polarization (080.2740) Geometric optical design (220.1250) Aspherics

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Study of Camera Calibration Process with Ray Tracing 15

Study of Camera Calibration Process with Ray Tracing

引用

Conference on current developments in Lens design and optical engineering Xv

作者： Poulin-Girard, A. -S. Dallaire, X. veillette, A. Thibault, S. Laurendeau, D. Univ Laval Dept Phys Genie Phys & Opt Ctr Opt Photon & Laser Quebec City PQ G1V 0A6 Canada Univ Laval Dept gen elect & gen informat Lab vision & syst numer Quebec City G1V 0A6 PQ Canada

ISBN: (纸本)9781628412192

Camera calibration is essential for any optical system used to obtain 3D measurements from images. The precision of the 3D depth estimation relies on an appropriate camera model and the accurate estimation of model parameters. These parameters are sensitive to environmental conditions and it is well established that a vision system should be calibrated in operating conditions. This is not always possible since the calibration process is often tedious and time-consuming. Unfortunately, the use of poorly estimated calibration parameters for 3D reconstruction and measurements may lead to suboptimal performance of the system and inaccurate depth estimation. This paper presents a technique using an existing camera model and optical design software to perform calibration simulations. This virtual calibration technique allows for a study of the impact of environmental conditions on the calibration parameters. Using this procedure, it is also possible to predict the statistical behavior of the calibration parameters considering the chosen fabrication processes and tolerances. It can assist vision scientists in the choice of the optical system that best meets the requested precision of the 3D reconstruction. This technique could eventually be integrated in the lens design process to create more reliable optical systems that could be calibrated and used in a range of environmental conditions with a very small variation of their calibration parameters.

关键词： Camera calibration optical design software tolerancing lens design

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Recent experience with design and manufacture of cine lenses 16

Recent experience with design and manufacture of cine lenses

引用

Conference on current developments in Lens design and optical engineering XvI

作者： Thorpe, Michael D. Dalzell, Kristen E. Raytheon ELCAN Opt Technol Midland ON Canada

ISBN: (纸本)9781628417449

Modern cine lenses require a high degree of aberration correction over a large and ever expanding image size. At low to medium volume production levels, these highly corrected designs also require a workable tolerance set and compensation scheme for successful manufacture. In this paper we discuss the design and manufacture of cine lenses with reference to current designs both internal and in the patent literature and some experience in design, tolerancing and manufacturing these lenses in medium volume production.

关键词： lens design compensators manufacturability cine

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optical design for a breadboard high resolution spectrometer for SIRTF/IRS 6

Optical design for a breadboard high resolution spectrometer...

引用

current developments in optical design and engineering vI Conference

作者： Brown, RJ Houck, JR vanCleve, J Ball Aerospace and Technologies Corp. (United States) Cornell Univ. (United States)

ISBN: (纸本)0819422517

The optical design of a breadboard high resolution infrared spectrometer for the IRS instrument on the SIRTF mission is discussed. The spectrometer uses a crossed echelle grating configuration to cover the spectral region from 10 to 20 mu m with a resolving power of approximate to 600. The all reflective spectrometer forms a nearly diffraction limited image of the two dimensional spectrum on a 128 x 128 arsenic doped silicon area array with 75 mu m pixels. The design aspects discussed include, grating numerology, image quality, packaging and alignment philosophy.

关键词： spectrometer infrared echelle cryogenics grating SIRTF IRS

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Analysis of three-element zoom systems for laser beam expanders with tunable-focus lenses 16

Analysis of three-element zoom systems for laser beam expand...

引用

Conference on current developments in Lens design and optical engineering XvI

作者： Kulmon, Pavel Miks, Antonin Novak, Pavel Novak, Jiri Czech Tech Univ Fac Civil Engn Dept Phys Prague 16629 Czech Republic

ISBN: (纸本)9781628417449

Our work is focused on the problem of a theoretical analysis of imaging properties and an initial optical design of a three-element zoom optical system for laser beam expanders using lenses with a tunable focal length. Equations that enable to calculate basic paraxial properties and parameters of such optical systems are derived Finally, the derived equations are applied on an example of calculation of parameters of the three-element zoom system for the laser beam expander.

关键词： geometric optical design first-order optics zoom lenses laser beam expander Gaussian beam tunable-focus lenses

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AN ATTEMPT TO DEvELOP ZOOM LENS design EXPERT SYSTEM

AN ATTEMPT TO DEVELOP ZOOM LENS DESIGN EXPERT SYSTEM

引用

5TH CONF ON current developments IN optical design AND optical engineering

作者： WENG, ZC CHEN, ZY YANG, YH REN, T CONG, XJ YAO, YC HE, FL LI, YY State Key Laboratory of Applied Optics Changchun Institute of Optics and Fine Mechanics Academia Sinica P.O. Box 1024 Changchun 130022 China Dept. of Computer Science Jilin University Changchun China

We have developed zoom lens design expert system intended to operate with little user intervention. The paper puts the emphasis on the knowledge representation, system architecture, reasoning and control strategy of t... 详细信息

ISBN: (纸本)0819406554

关键词： Expert systems

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optical-PERFORMANCE OF AXIAL GRADIENT AND ASPHERIC SURFACE LENSES - STUDY AND ANALYSIS 4

OPTICAL-PERFORMANCE OF AXIAL GRADIENT AND ASPHERIC SURFACE L...

引用

Conference on current developments in optical design and optical engineering Iv

作者： KASSIM, AM SHEALY, DL AL QUDS UNIV COLL SCI & TECHNOLDEPT PHYSJERUSALEMISRAEL

ISBN: (纸本)0819415871

Using the caustic merit function for plane waves incident upon a singlet lens, a comparison between the optical performance of the lens using an axial gradient index with spherical surfaces or aspheric surfaces with constant index material has been investigated. Results indicate that the use of an inhomogeneous medium for the lens material is more effective in the controlling aberrations than the use of aspheric surfaces for a similar lens.

关键词： GRIN lenses Electronic filtering Aspheric lenses Lenses Ray tracing Geometrical optics Refractive index Spherical lenses Lens design Gradient-index optics

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