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4th International conference of the Italian Association of design Methods and Tools for Industrial engineering

作者： Brunzini, Agnese Senesi, Paolo Mandolini, Marco Pagnoni, Mario Mazzoli, Alida Univ Politecn Marche Dept Ind Engn & Math Sci Via Brecce Bianche 12 I-60131 Ancona Italy YourFACE Clin Ars Biomed Via Luigi Bodio 58 I-00191 Rome Italy Univ Politecn Marche Dept Mat Environm Sci & Urban Planning Via Brecce Bianche12 I-60131 Ancona Italy

ISBN: (纸本)9783031765933;9783031765940

The primary procedures performed in maxillofacial surgery are osteotomy and repositioning. Surgeons usually exploit 3D printed guides and splints which entail considerable production time and high costs. To address these issues, innovative technologies such as mixed reality (MR) are emerging, but accuracy must still be assessed. Head-mounted displays (HMDs) are categorised into two main types: optical and video see-through. Recognisable comparisons between HoloLoens 2 (optical see-through) and Varjo XR3 (video see-through) are still not available in the scientific literature. This paper compares the accuracy of simulating maxillofacial surgery through these two different headsets. For the evaluation, a 3D model of a skull was 3D printed using Color Material Jetting 3D printing technology. Six people tested the MR application by i) tracing lines and holes with a pen following the holograms displayed on the phantom's anatomy for osteotomies, ii) moving the maxillary fragmented bone according to the projected hologram for repositioning. Times were recorded during the trial. The tested geometries were then 3D scanned to reconstruct the traced cutting lines and holes, and quantitative results were extracted in CloudCompare by comparing the drawn and nominal lines. For the repositioning, deviations have been computed to calculate the mean deviation from the planned displacement. The accuracy of the two HMDs resulted similar for the osteotomy, while Varjo XR3 proved to be preferable for the repositioning.

关键词： Mixed Reality Healthcare design Maxillofacial Surgery Video See-Through optical See-Through

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design of Ge/GeSiSn Quantum Cascade Laser and Detector

Design of Ge/GeSiSn Quantum Cascade Laser and Detector

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IEEE International conference on Group iv Photonics

作者： G. Sun R. Soref J. Khurgin S.-Q. Yu G.-E. Chang H. H. Cheng Department of Engineering University of Massachusetts Boston Boston Massachusetts USA Department of Electrical and Computer Engineering Johns Hopkins University Baltimore Maryland USA Department of Electrical Engineering University of Arkansas Fayetteville Arkansas USA Department of Mechanical Engineering National Chung Cheng University Taiwan Center for Condensed Matter Sciences National Taiwan University Taipei Taiwan

We present a feasibility study of lattice-matched Ge/GeSiSn quantum cascade structures that can be potentially developed into quantum cascade lasers and detectors in longwave infrared based on intersubband transitions... 详细信息

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

关键词： Detectors optical detectors Silicon photonics Quantum cascade lasers

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Acousto-optic modulation on aluminum scandium nitride - silicon hybrid integrated platform

Acousto-optic modulation on aluminum scandium nitride - sili...

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IEEE International conference on Group iv Photonics

作者： Weixiong Huang Jiawei Li Lipeng Xia Yuhan Sun Tao Wu Yi Zou School of Information Science and Technology ShanghaiTech University Shanghai China Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai China University of Chinese Academy of Sciences Beijing China Shanghai Engineering Research Center of Energy Efficient and Custom AI IC Shanghai China

We demonstrate an acousto-optic modulation device based on an AlScN – SiO2 − SOI platform, achieving a π-phase voltage of 33V and a voltage-length product of 0.66 V ⋅ cm.

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

We demonstrate an acousto-optic modulation device based on an AlScN – SiO2 − SOI platform, achieving a π-phase voltage of 33V and a voltage-length product of 0.66 V ⋅ cm.

关键词： Silicon compounds Integrated optics optical design Electronic components Voltage Scandium Silicon photonics optical materials optical modulation optical devices

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High-Efficiency and Low Back-Reflection Fully Etched TM Mode Silicon Waveguide Grating Coupler

High-Efficiency and Low Back-Reflection Fully Etched TM Mode...

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IEEE International conference on Group iv Photonics

作者： Xuetong Zhou Ying Xue Fan Ye Ziyao Feng Jianfeng He Xiankai Sun Kei May Lau Hon Ki Tsang Department of Electronic Engineering The Chinese University of Hong Kong Hong Kong SAR China Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong China

We propose a novel design for high-performance fully etched TM waveguide grating coupler with minimum feature size above 260 nm. The device has low back reflection and high efficiency.

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

We propose a novel design for high-performance fully etched TM waveguide grating coupler with minimum feature size above 260 nm. The device has low back reflection and high efficiency.

关键词： Couplings Photonic integrated circuits Couplers Production Silicon photonics Reflection Gratings optical waveguides Substrates Standards

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Ultra-Wide Adiabatic Microring Resonators Based on Euler Curve and Modified Bessel Curve for Improved Variation Tolerance

Ultra-Wide Adiabatic Microring Resonators Based on Euler Cur...

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IEEE International conference on Group iv Photonics

作者： Yu Chen Meilin Zhong Wei Cao Shenghao Liu Xiaogang Chen Xu Sun Gordon Ning Liu School of Electronic and Information Engineering Soochow University Suzhou China Silicon Photonics R&D Center CreaLights Technology Co. Ltd. Suzhou China

We optimized the inner contour of an ultra-wide adiabatic curved waveguide based on high-order Bessel curves using inverse design method to achieve the stable mode transmission. The adiabatic microring formed by the d... 详细信息

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

关键词： optical losses Fabrication Sensitivity Simulation Propagation losses Silicon photonics Resonators

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CW electrically pumped GeSn/SiGeSn MQW lasers

CW electrically pumped GeSn/SiGeSn MQW lasers

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IEEE International conference on Group iv Photonics

作者： O. Concepción L. Seidel T. Liu G. Capellini M. Oehme D. Grützmacher D. Buca Peter Grünberg Institute 9 Jülich Germany Institute of Semiconductor Engineering University of Stuttgart Stuttgart Germany IHP-Leibniz Institut für Innovative Mikroelektronik Frankfurt (Oder) Germany Department of Sciences Università Roma Roma Italy

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

A continuous-wave (CW) electrically pumped Si-based laser operating at room temperature (RT) is known as the "holy grail" in the group-iv community. This work presents the first step in this direction presenting a CW electrically pumped GeSn/SiGeSn multi-quantum-well (MQW) laser. Cavity design improvements like micro-ring geometry result in a decrease in the threshold and a strong improvement in the laser performance. The laser operates in a CW and/or pulse regime below 100 K.

关键词： Geometry optical losses Heating systems Lasers and electrooptics Ring lasers Silicon photonics Laser excitation Pump lasers Quantum well devices Optimization

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optical design for imaging spectroscopy

Optical design for imaging spectroscopy

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conference on Current Developments in Lens design and optical engineering iv

作者： Mouroulis, P Green, RO CALTECH Jet Prop Lab Pasadena CA 91109 USA

design examples are given for imaging spectrometer systems operating in the solar reflected spectrum. design considerations and procedures are outlined for incoherently and coherently coupled systems. The case of a pa... 详细信息

ISBN: (纸本)0819450464

关键词： optical design imaging spectroscopy concentric spectrometers convex/concave gratings

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COMPUTER-GENERATED DIFFRACTivE optical-ELEMENTS FOR optical INTERCONNECTIONS - design AND VALIDATION CODES 4

COMPUTER-GENERATED DIFFRACTIVE OPTICAL-ELEMENTS FOR OPTICAL ...

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conference on Current Developments in optical design and optical engineering iv

作者： DIMARTINO, P PERRONE, G MONTROSSET, I POLITECN TORINO DIPARTIMENTO ELETTR I-10129 TURIN ITALY

ISBN: (纸本)0819415871

In this paper we discuss the design of Diffractive optical Elements that can be used for optical interconnections. Q uite general computer programs have been realized for the design and the validation of such optical elements. As examples, in the paper we discuss the design of a 1 to 3, a 1 to 5 and a 1 to 4 interconnections, workingeither in reflection or in transmission.

关键词： Diffractive optical elements optical design Wavefronts optical interconnects optical components Reflection Reflectivity Computing systems Network architectures Resistors

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Binary phase difference diffuser: design and application in digital holography

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optical engineering 2002年第2期41卷 319-327页

作者： Chhetri, BB Serikawa, S Yang, SY Shimomura, T Kyushu Inst Technol Dept Elect Engn Elect Course Tobata Ku Kitakyushu Fukuoka 8048550 Japan

design of a simple diffuser, in which the absolute value of the phase difference between the diffuser's adjacent samples is constant, is considered. A condition is imposed in the design so that the diffuser is suitable for use with the iterative method based on the iterative Fourier transform algorithm for calculating a two-dimensional complex amplitude function that possesses a bandlimited and smooth spectrum. A method for effectively designing this diffuser is proposed, and its application in the field of digital holography is presented. (C) 2002 Society of Photo-optical Instrumentation Engineers.

关键词： digital holography binary phase difference diffuser bandlimited smooth spectrum phase ambiguity object-dependent diffuser iterative Fourier transform algorithm

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ALIGNMENT SENSITivITIES OF THE CONJUGATE NULL TEST 4

ALIGNMENT SENSITIVITIES OF THE CONJUGATE NULL TEST

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conference on Current Developments in optical design and optical engineering iv

作者： STAHL, HP HUGHES DANBURY OPT SYST DANBURYCT 06810

The conjugate null test is commonly used to test surface errors of conic mirrors. Unfortunately, its accuracy is limited by rigid body misalignment errors. This paper derives the misalignment aberrations for these err... 详细信息

ISBN: (纸本)0819415871

关键词： ALIGNMENT ABERRATIONS optical TESTING NULL TESTS CONJUGATE NULL TEST CONIC MIRROR

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