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

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Fiber-optical system for visualization of inner pipe defects by microrobot.

Fiber-optical system for visualization of inner pipe defects...

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conference on current developments in lens design and optical engineering V

作者： Gradetsky, V Krabchuk, L Kniazkov, M Solovtsov, V Tulaikova, T Simakova, M Russian Acad Sci Inst Prob Mech Moscow 119526 Russia

ISBN: (纸本)0819454613

The control systems of the miniature robots are suggested for their motion over internal surfaces inside of the small diameter tubes. The mechanical system information-measuring sensor and control systems are considered. Three versions of the mechanical systems are suggested: electromagnetic, triad wheels and conversion of rotation motion to translation one. The electromagnetic mechanism use push pull tipe method for translation motion realization. Developed schemes in the modules design of control systems were checked experimentally on the robot's prototypes. Some results of the computer simulation illustrate the multilink robot control motion along the internal diameters of the tubes. This work was fulfilled under financial support of the Russian Found of Fundamental researches N 01-01-00913 and in frames of Federal Multi Purpose Scientific and Technical Program of Ministry of Industry, Science and Technologies: "Researches and developments on priority directions of science and technology", "Knowledgeable basic investigations" block, "Basic investigations at the field of physics sciences" part Mechanics.

关键词： minirobot in-tube motion mechanical system control algorithms on-board microprocessor control schemes

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optical simulation of the white light display color change of the bulk scattering diffuser used in the mini-LED backlight module 25

Optical simulation of the white light display color change o...

引用

conference on current developments in lens design and optical engineering XXV

作者： Syu, Jhih-Ling Huang, Po-Sung Ma, Shih-Hsin Feng Chia Univ Dept Photon Taichung Taiwan

ISBN: (纸本)9781510679221;9781510679238

This study aims to investigate the impact of Bulk Scattering Diffuser (BSD) on color variation in Mini-LED backlight modules under different optical parameters. To predict spectral distribution distortion of BSD in Mini-LED backlight module, a virtual Mini-LED backlight is built in the optical simulation software. The scattering behavior of BSD is also established by the calculation model based on Mie scattering theory. In simulations, the corresponding color coordinate of distorted spectrum is moved in the CIE 1931 color space owing to varying parameters of BSD. Finally, under the condition of highly color uniformity, through the comparison between the color coordinates and the MacAdam ellipse, the suitable manufacturing parameters of BSD are discussed.

关键词： Mini-LED Backlight module Bulk scattering diffuser Color temperature MacAdam's ellipse

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design of two-dimensional (crossed) grating calculation in Czerny-Turner spectrometer with usage of freeform mirrors 18

Design of two-dimensional (crossed) grating calculation in C...

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conference on current developments in lens design and optical engineering xviiI

作者： Bazhanov, Yury Demura, Elena Cherkashina, Rasima Vlahco, Vadim. Corp Precis Syst & Instruments 53 Aviamotornaya Str Moscow 111024 Russia Dynaoptics 8 Boon Lay Way Singapore 609964 Singapore

ISBN: (纸本)9781510612082;9781510612075

The possibility of building a spectrometer based on a flat two-dimensional (crossed) grating is being considered. The most suitable layout for this is the Czerny-Turner, where a spectral image lies in the plane. In this paper an attempt to compensate for the transverse aberrations is made by using a diffraction grating with variable spacing grooves in both sections and aspheric mirror elements of layout, including ones having a freeform surface. Using crossed grating greatly simplifies the device layout and may be particularly effective when used in the ultraviolet and infrared regions of the spectrum, due to a small choice of transmissive materials for manufacturing spectral prisms. This paper gives examples of such case.

关键词： cross-dispersion two-dimensional (crossed) gratings Czerny-Turner spectrometers freeform mirrors

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Integration of optical waveguide technology with multi-channel color sensors for enhanced urine test strip analysis system 25

Integration of optical waveguide technology with multi-chann...

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conference on current developments in lens design and optical engineering XXV

作者： Li, Yi-Ming Lee, Tsung-Xian Natl Taiwan Univ Sci & Technol Grad Inst Appl Sci & Technol 43Keelung RdSec 4 Taipei 106335 Taiwan Natl Taiwan Univ Sci & Technol Grad Inst Color & Illuminat Technol 43Keelung RdSec 4 Taipei 106335 Taiwan

ISBN: (纸本)9781510679221;9781510679238

Urine test strips aid in prompt health assessment through color changes, but visual interpretation can be misleading, particularly with strips having multiple functions. To tackle this, some companies and studies have created paper strip analyzers using CMOS sensors. However, issues like ambient light and shooting angles often cause detection failures. Therefore, this study proposes integrating a multi-channel color sensor as the core component of a urine test strip analysis system and optical waveguide technology for optical system design architecture. This design aims to capture more color information in urine, and the optical waveguide technology ensures uniform light guidance, providing real-time transmission and high-quality signal data for urine analysis systems.

关键词： urine test strips multi-channel color sensor optical waveguide light-emitting diode

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optical design of a near-infrared birefringent filter system and measurement on birefringence index of calcite

Optical design of a near-infrared birefringent filter system...

引用

conference on current developments in lens design and optical Systems engineering

作者： Wang, JS Wang, HM Spirock, TJ Lee, CY Ravindra, NM Ma, J Goode, PR Denker, C New Jersey Inst Technol Dept Appl Phys Newark NJ 07102 USA

ISBN: (纸本)0819437387

In this paper, we present an optical design of a near-infrared (at FeI 15648.5 Angstrom) birefringent filter system which is used to obtain the chromatic images of the sun and measure the solar magnetic field at the Big Bear Solar Observatory (BBSO). This system consists of a prefilter, a liquid crystal analyzer, a wavelength-tunable birefringent filter and a Fabry-Perot Etalon. This system is expected to achieve a clean narrow pass band (1/8 Angstrom). It can also be tuned across the spectral line to obtain line profiles of two-dimensional fields of view. During the design of the tunable near-IR birefringent filter and the test of its components, we found the value of birefringence index mu (n(e) - n(o)) of calcite at spectral range near 15648.5 Angstrom is very different from the value in literature(1). Because the birefringence index is important for the design of birefringent optical components, the birefringence index of calcite and its thermal coefficient are measured. Some test results of the four pairs of calcite prate used in the birefringent filter are presented.

关键词： near-infrared birefringent filter calcite birefringence index Zeeman effect

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A Toolkit for Multiscale optical System Inverse-design 23

A Toolkit for Multiscale Optical System Inverse-Design

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conference on current developments in lens design and optical engineering XXIII Part of SPIE Optics and Photonics conference

作者： Campbell, Sawyer D. Jenkins, Ronald P. Zerbe, Benjamin A. Whiting, Eric B. Balasubramanian, Manushanker Das, Arkaprovo Young, Jacob T. Werner, Douglas H. Werner, Pingjuan L. Penn State Univ Sch Elect Engn & Comp Sci University Pk PA 16802 USA

ISBN: (纸本)9781510654198;9781510654181

optical system design is undergoing a transformational change with the increases in computational horsepower, cutting-edge algorithmic developments, and the advent of new nanofabrication technologies. Among the most exciting advances in recent memory are optical metasurfaces, which are patterned surfaces commonly realized through nanofabrication that can imbue optical engineers with expanded degrees of design freedom due to their ability to exploit the generalized form of Snell's law. Through intelligent optimization and design, metasurfaces can be constructed which achieve arbitrary chromatic dispersion behaviors and unprecedented control over polarization that simply cannot be realized with conventional optical elements. However, designing high-performance metasurfaces requires the use of full-wave simulation tools and numerical optimization techniques which necessitate considerable computational resources. Moreover, while optical metasurfaces are moving towards millimeter and centimeter scale diameter lenses with advances in nanofabrication techniques, it is computationally infeasible to employ full-wave simulation tools directly to model optical systems that use such large size elements. Nevertheless, the size, weight, and power (SWaP) advantages afforded by optical metasurfaces make them a compelling choice for designers to consider in a number of applications, which are currently limited by bulky conventional optical solutions. Therefore, techniques that can rapidly model metasurfaces in conjunction with conventional optical elements such as lenses, mirrors, and prisms are highly desirable. In this presentation, we highlight a toolkit of custom solvers, design procedures, and powerful optimization algorithms that simplify and accelerate the development of hybrid optical systems with arbitrary combinations of conventional and metasurface elements.

关键词： optical design optimization inverse-design gradient-index lenses metasurfaces simulation multiscale

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On-Orbit Thermal Distortion and optical Performance Evaluation of FORMOSAT-5 Remote Sensing Instrument

On-Orbit Thermal Distortion and Optical Performance Evaluati...

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conference on current developments in lens design and optical engineering XIII

作者： Chen, Ching-Wei Chen, Chia-Ray Ho, Cheng-En Yang, Mei-Yi Chang, Shenq-Tsong Huang, T. M. Natl Space Org NSPO Natl Appl Res Labs Hsinchu 300 Taiwan

ISBN: (纸本)9780819492036

FORMOSAT-5 is the first space program that National Space Organization (NSPO) takes full responsibility for the complete satellite system engineering design including payload(s). FORMOSAT-5 will operate in a sun synchronous orbit at 720-km altitude with 98.28-degree inclination angle. The optical Remote Sensing Instrument (RSI) can provide 2-m resolution panchromatic and 4-m resolution multi-spectral images. A Cassegrain type of RSI with two reflective aspheric mirrors and spherical corrector lens is designed. The space thermal environment is one of the important factors that affect the image quality of a space optical RSI. Thermal deformation of RSI structure and mirrors will impact the optical performance. Some preliminary thermal and opto-mechanical analyses are conducted. The relationship among temperature distributions, thermal deformations and image degradation of on-orbit behaviors are discussed. The thermal induced instabilities are incorporated in optical models (e.g., OSLO) by use of Zernike polynomial coefficients to calculate the system MTF and WFE. Due to different thermal environments, on-orbit optical performances depend on imaging locations. Detailed studies and discussions are done in this paper to identify the major sources of thermal deformations and their impacts on image quality.

关键词： Remote Sensing Instrument (RSI) Cassegrain telescope Zernike polynomial on-orbit MTF WFE

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The improved optical setup for Abbe-Porter experiment 18

The improved optical setup for Abbe-Porter experiment

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conference on current developments in lens design and optical engineering xviiI

作者： Borovytsky, V. Hudz, O. Antonenko, V. Natl Tech Univ Ukraine Igor Sikorsky KPI Opt Engn Dept Pr Peremogy 37 UA-03056 Kiev Ukraine

ISBN: (纸本)9781510612082;9781510612075

The interesting experiments for investigation of image formation in optical microscopes have been done by E. Abbe, A. Porter and L. Mandelshtam. These experiments have become the classical ones and they are widely used for explanation of Fourier optics. The principal disadvantage of them is difference in optical schemes for observation of object images and their spatial spectrums. The proposed optical setup makes possible demonstration of two stages of image formation - obtaining a spatial spectrum and composing a magnified object image - together in one plane. This setup contains two imaging channels separated by a beam splitter after a microscope objective. The first one forms a magnified object image, the second one - an image of a spatial spectrum. These images may be observed on a screen, via eyepieces or using image sensors. Any occluding of spectrum zones becomes visible and it leads to the corresponded changes in an object image. This optical setup would be useful for optical education and research.

关键词： Abbe-Porter experiment Abbe theory Fourier optics image formation microscopy resolution optical education Fourier transform

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Study of Camera Calibration Process with Ray Tracing 15

Study of Camera Calibration Process with Ray Tracing

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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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Freeform Optics design of Primary lens for Uniform Irradiance Distribution of Concentrator Photovoltaic System 20

Freeform Optics Design of Primary Lens for Uniform Irradianc...

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conference on current developments in lens design and optical engineering XX

作者： Pham Thanh Tuan Duy, N. N. Vu Ngoc Hai Shin, Seoyong Myongji Univ Dept Informat & Commun Engn Gyeonggi Do 17058 South Korea Vietnam Acad Sci & Technol Inst Appl Mat Sci Ho Chi Minh City 70072 Vietnam Phenikaa Univ Elect & Elect Engn Hanoi 1000 Vietnam Duy Tan Univ Fac Nat Sci Danang 550000 Vietnam

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

In this paper, a primary lens of concentrator photovoltaic (CPV) system is designed by using freeform optics. The designed lens is constructed based on a basic idea of a combination of Fresnel lens and freeform optics, in which the lens is divided into an array of sub-lenses, which are designed using the conservation of optical path length and the edge ray theorem to get uniform irradiance distribution over the receiver. In this design, every sub-lens is designed to guide the direct sunlight over the receiver with uniform irradiance so that the whole of the primary lens will converge uniformly the direct sunlight over the receiver. The structure of the lens is designed firstly by using Matlab program for every sublens. The Matlab data of the designed lens structure is then used to build the three-dimensional (3D) lens in LightTools (TM) software. The ray tracing technique in LightTools (TM) software is used to find out the optimum structure of the freeform lens. Furthermore, the simulation is performed to estimate the efficiency of the lens as a concentrator of a CPV system by using the light source with the sunlight spectrum. The designed lens can achieve high geometrical concentration ratio and uniform irradiance distribution over the receiver. The simulation results show that the lens can easily reach a high concentration ratio (494 times) with uniform irradiance distribution and good optical efficiency (86%).

关键词： Concentrator photovoltaic (CPV) Primary lens Freeform optics Sub-lenses array Uniform irradiance distribution

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