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Optical Problems in Imaging Optical Engineering

Pan Junhua

Strategic Study of CAE 2000, Volume 2, Issue 3,   Pages 32-35

Abstract: According to the trend of technical progress, it is unavoidable to use reflective optical systems, andFor optical system design, the main problem is how to construct an effective reflecting system whichmay be optimized by the optical CAD.The key problem in fabrication is to make high accuracy, large relative aperture, high-order, large asphericityThe null method is the principal way for testing aspheric surfaces up to now.

Keywords： imaging optics     aspheric mirror     optical design     optical fabrication and testing    

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Precision glass molding: Toward an optimal fabrication of optical lenses

Liangchi ZHANG,Weidong LIU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 3-17 doi: 10.1007/s11465-017-0408-3

Abstract: and time consuming to use machining processes, such as grinding, polishing and lapping, to produce opticalPrecision glass molding (PGM) has thus been developed to realize an efficient manufacture of such opticalFor example, a PGM process must be carried out within the super-cooled region of optical glass abovemanufacturing chain consideration from mold material selection, property and deformation characterization of optical

Keywords： precision glass molding     optical lens     constitutive modeling     optimization     manufacturing chain     Industry    

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Recent advancements in optical microstructure fabrication through glass molding process

Tianfeng ZHOU,Xiaohua LIU,Zhiqiang LIANG,Yang LIU,Jiaqing XIE,Xibin WANG

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 46-65 doi: 10.1007/s11465-017-0425-2

Abstract:

Optical microstructures are increasingly applied in several fields, such as optical systems, precisionThis paper presents an overview of optical microstructure fabrication through glass molding and highlightsthe applications of optical microstructures in mold fabrication and glass molding.latest advancements in glass molding technologies are detailed, including new mold materials and their fabrication

Keywords： optical microstructure     microgroove     microlens     glass molding process     single-point diamond cutting    

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Micro-optical fabrication by ultraprecision diamond machining and precision molding

Hui LI, Likai LI, Neil J. NAPLES, Jeffrey W. ROBLEE, Allen Y. YI

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2,   Pages 181-192 doi: 10.1007/s11465-017-0444-z

Abstract: Ultraprecision diamond machining and high volume molding for affordable high precision high performance opticalelements are becoming a viable process in optical industry for low cost high quality microoptical componentToday optical molds, including freeform surfaces and microlens arrays, are routinely diamond machinedTo implement precision optical manufacturing by molding, numerical modeling can be included in the future

Keywords： ultraprecision machining     slow tool servo     fast tool servo     compression molding     injection molding     microlens arrays     opticalfabrication    

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Application and evaluation of optical distance measurements in geometrical quality testing of microgears

Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 261-269 doi: 10.1007/s11465-010-0100-3

Abstract: Microgears are increasingly important in industry. Compared to normal gears, the quality assurance of microgears needs more accurately measured data and simple but feasible measurement methods because of their dimension particula

Keywords： microgear     optical distance measurement     profile deviation     CWL sensor     micromechanical technology (MMT)    

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Fabrication and Mechanical Testing of Ultralight Folded Lattice-Core Sandwich Cylinders Article

Wanxin Li, Qing Zheng, Hualin Fan, Bin Ji

Engineering 2020, Volume 6, Issue 2,   Pages 196-204 doi: 10.1016/j.eng.2019.11.008

Abstract:

In this research, two novel folded lattice-core sandwich cylinders were designed, manufactured, and tested. The lattice core has periodic zigzag corrugations, whose ridges and valleys are directed axially or circumferentially. Free vibration and axial compression experiments were performed to reveal the fundamental frequency, free vibration modes, bearing capacity, and failure mode of the cylinder. A folded lattice core effectively restricts local buckling by reducing the dimension of the local skin periodic cell, and improves the global buckling resistance by enhancing the shear stiffness of the sandwich core. The cylinders fail at the mode of material failure and possess excellent load-carrying capacity. An axially directed folded sandwich cylinder has greater load-carrying capacity, while a circumferentially directed folded sandwich cylinder has higher fundamental frequencies. These two types of folded lattices provide a selection for engineers when designing a sandwich cylinder requiring strength or vibration. This research also presents a feasible way to fabricate a large-dimensional folded structure and promote its engineering application.

Keywords： Folded lattice-core sandwich cylinder     Fabrication     Mechanical testing    

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Ultra-Precision Machining Technology and Equipment for High-End Optical Elements

Jiang Zhuangde, Li Changsheng , Sun Lin, Duan Duanzhi, Kang Chengwei ,Chen Shanshan, Lin Qijing, Yang Shuming

Strategic Study of CAE 2023, Volume 25, Issue 1,   Pages 131-141 doi: 10.15302/J-SSCAE-2023.07.003

Abstract:

High-end optical elements determine the performance of high-end equipment.Researching the ultra-precision machining technology and equipment for high-end optical elementsIn this study, the ultra-precision machining methods and equipment for optical elements, high-performancebasic components, and measurement methods and equipment used in ultra-precision optical machining extensive survey and discussions, a technology roadmap for ultra-precision manufacturing of high-end optical

Keywords： optical element     precision manufacturing     ultra-precision machine tool     ultra-precision machining     opticalfabrication    

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Progress in terahertz nondestructive testing: A review

Shuncong ZHONG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 273-281 doi: 10.1007/s11465-018-0495-9

Abstract: Recently, THz nondestructive testing (NDT) technology has become an interesting topic.

Keywords： terahertz pulsed imaging (TPI)     nondestructive testing (NDT)     composite material     thermal barrier coating    

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Sonic General Non-destructive Testing Technique

Chen Jimao

Strategic Study of CAE 2000, Volume 2, Issue 4,   Pages 64-69

Abstract:

This paper describes new general multi-mode non-destructive testing (NDT) of composite materials andThis technique which is based on sonic and ultrasonic testing performs five different modes of testing

Keywords： sonic general testing     general non-destructive testing (NDT)     non-destructive testing of composite materials     mechanical impedance analysis (MIA)     vibration analysis (VA)     resonance testing    

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Mesoscale fabrication of a complex surface for integral impeller blades

Xibin WANG,Tianfeng ZHOU,Lijing XIE,Li JIAO,Zhibing LIU,Zhiqiang LIANG,Pei YAN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 116-131 doi: 10.1007/s11465-017-0426-1

Abstract: For the fabrication of a complex integral impeller, a micro-ball-end mill is designed in accordance with

Keywords： mesoscale fabrication     micro-milling tool     mesoscale milling     impeller blade    

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Development of surface reconstruction algorithms for optical interferometric measurement

Dongxu WU, Fengzhou FANG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 1-31 doi: 10.1007/s11465-020-0602-6

Abstract: Optical interferometry is a powerful tool for measuring and characterizing areal surface topography inA variety of instruments based on optical interferometry have been developed to meet the measurementThis paper provides an in-depth perspective of surface topography reconstruction for optical interferometricPrinciples, configurations, and applications of typical optical interferometers with different capabilitiesThis paper also presents the new challenges that optical interferometry techniques are facing in surface

Keywords： surface topography     measurement     optical interferometry     coherence envelope     phase-shifting algorithm    

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Novel sensing techniques for full-scale testing of civil structures

Kaoshan DAI, Zhenhua HUANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 240-256 doi: 10.1007/s11709-012-0172-8

Abstract: Performing full-scale structural testing is an important methodology for researchers and engineers inFull scale testing helps the researchers understand civil infrastructures’ loading scenarios, behaviorsTo conduct a full-scale structural testing, sensors are used for data acquisitions.effective sensors, this study reviewed and categorized new sensing techniques for full-scale structural testingThe researchers of this study categorized sensors used for civil-infrastructure testing into traditional

Keywords： sensing technique     full-scale testing     wireless sensor     remote sensing     LiDAR     laser vibrometer    

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The Latest Development of Optical Fiber, Optical Fiber Band and Optical Cable Technology Abroad

Liu Liangyan

Strategic Study of CAE 2001, Volume 3, Issue 9,   Pages 86-94

Abstract:

In this paper, new development about the study of dispersion-compensable low transmission loss opticalfiber, nonzero dispersion displacement optical fiber, and carbon-coated or silicon nitride-coated opticalThen the manufacture technology of band optical fiber including its structure, coatings, properties andMulti-core optical fiber band cable manufacture technology such as twisted loose-tube, center loose-tube, frame, dry core band optical cable was also discussed.

Keywords： optical communication     low transmission loss optical fiber     optical fiber band     band optical fiber cable    

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Effects of critical geometric parameters on the optical performance of a conical cavity receiver

Hu XIAO, Yanping ZHANG, Cong YOU, Chongzhe ZOU, Quentin FALCOZ

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 673-683 doi: 10.1007/s11708-019-0630-2

Abstract: The optical performance of a receiver has a great influence on the efficiency and stability of a solarMost of the literature focuses on the optical performance of receivers with different geometric shapesThese factors affect the optical efficiency, the maximum heat flux density, and the light distributionThe increase in the number of loops contributed to an increase in the optical efficiency and a uniformThe conical cavity receiver had an optimal optical performance when the focal point of the collector

Keywords： parabolic collector     conical cavity receiver     critical geometric parameters     optical performance    

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Permeability testing of drilling core sample from pavement

WANG Suda, TANG Zhengguang, NING Xiaojun, WU Peiguan, XING Pingyi

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 391-394 doi: 10.1007/s11709-008-0045-3

Abstract: equipment is used to measure the permeability coefficient of the pavement drilling core sample and relevant testingTesting drilling core samples from a certain highway of Yunnan province has been proven to be feasible

Keywords： province     material     feasible     permeability coefficient     equipment    

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Title Author Date Type Operation

Optical Problems in Imaging Optical Engineering

Pan Junhua

Journal Article

Precision glass molding: Toward an optimal fabrication of optical lenses

Liangchi ZHANG,Weidong LIU

Journal Article

Recent advancements in optical microstructure fabrication through glass molding process

Tianfeng ZHOU,Xiaohua LIU,Zhiqiang LIANG,Yang LIU,Jiaqing XIE,Xibin WANG

Journal Article

Micro-optical fabrication by ultraprecision diamond machining and precision molding

Hui LI, Likai LI, Neil J. NAPLES, Jeffrey W. ROBLEE, Allen Y. YI

Journal Article

Application and evaluation of optical distance measurements in geometrical quality testing of microgears

Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,

Journal Article

Fabrication and Mechanical Testing of Ultralight Folded Lattice-Core Sandwich Cylinders

Wanxin Li, Qing Zheng, Hualin Fan, Bin Ji

Journal Article

Ultra-Precision Machining Technology and Equipment for High-End Optical Elements

Jiang Zhuangde, Li Changsheng , Sun Lin, Duan Duanzhi, Kang Chengwei ,Chen Shanshan, Lin Qijing, Yang Shuming

Journal Article

Progress in terahertz nondestructive testing: A review

Shuncong ZHONG

Journal Article

Sonic General Non-destructive Testing Technique

Chen Jimao

Journal Article

Mesoscale fabrication of a complex surface for integral impeller blades

Xibin WANG,Tianfeng ZHOU,Lijing XIE,Li JIAO,Zhibing LIU,Zhiqiang LIANG,Pei YAN

Journal Article

Development of surface reconstruction algorithms for optical interferometric measurement

Dongxu WU, Fengzhou FANG

Journal Article

Novel sensing techniques for full-scale testing of civil structures

Kaoshan DAI, Zhenhua HUANG

Journal Article

The Latest Development of Optical Fiber, Optical Fiber Band and Optical Cable Technology Abroad

Liu Liangyan

Journal Article

Effects of critical geometric parameters on the optical performance of a conical cavity receiver

Hu XIAO, Yanping ZHANG, Cong YOU, Chongzhe ZOU, Quentin FALCOZ

Journal Article

Permeability testing of drilling core sample from pavement

WANG Suda, TANG Zhengguang, NING Xiaojun, WU Peiguan, XING Pingyi

Journal Article