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International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT)最新文献

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Tracking the sun's direction with a wide-angle metasurface for navigation 用广角超表面跟踪太阳的方向进行导航
Junjie Wang, Fei Zhang, M. Pu, Ling Liu, Shilin Luo, Ping Gao, Xiangang Luo
We report a lightweight metasurface with wide field of view (FOV), which can calculate incident angle by the focus of the sun for navigation. The solar altitude angle and solar azimuth angle for navigation can be resolved with converting the coordinate system to connect the sun with the focus. The designed metasurface overcomes bulky devices and bad weather owing to the fact that the metasurface operates at short-wavelength infrared band (SWIR) that penetrates smoke and fog.
我们报道了一种轻量化的宽视场超表面,它可以根据太阳的焦点计算入射角,用于导航。通过转换坐标系将太阳与焦点连接起来,就可以求解导航用的太阳高度角和太阳方位角。设计的超表面克服了笨重的设备和恶劣的天气,因为超表面工作在短波长红外波段(SWIR),可以穿透烟雾和雾。
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引用次数: 0
Study on combined manufacturing technology for high precision silicon aspherical optics 高精度硅非球面光学元件组合制造技术研究
Bin Xuan, Peng Wang, Kun Yang
Silicon aspherical optics are of widely used these years with the development of the improvement of optical manufacturing and testing technologies. Single point diamond turning for silicon aspherical optics can obtain high surface precision. However, the surface microscopic quality is difficult to reach the ideal specification, caused by the limitation of material characteristics. An experimental study on the combined manufacturing technology of single point diamond turning and polishing has been carried out and proposed in this paper. The optimum turning parameters of the main factors affecting the micro-nano quality of silicon diamond turning surface, such as cutting depth, spindle speed and feeding speed, were obtained by orthogonal experiments. After polishing, the surface roughness was reduced from 5.35 nm to 1.16 nm. Meanwhile, the PSD was improved obviously. The combined manufacturing technology can be applied for high precision silicon aspherical optics.
近年来,随着光学制造技术和检测技术的进步,硅非球面光学器件得到了广泛的应用。单点金刚石车削加工硅非球面光学器件可获得较高的表面精度。然而,由于材料特性的限制,表面微观质量难以达到理想的规格。本文对单点金刚石车削与抛光组合制造工艺进行了试验研究。通过正交试验,确定了影响硅金刚石车削表面微纳质量的主要因素切削深度、主轴转速和进给速度的最佳车削参数。抛光后,表面粗糙度由5.35 nm降至1.16 nm。同时,PSD也有了明显的提高。该组合制造技术可用于高精度硅非球面光学器件。
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引用次数: 0
Design of interferometer system with common optical path structure 共光路结构干涉仪系统的设计
Zhiqiang Lin, Yuting Wu, D. Lian, Min Wang
As a precision instrument of wavelength magnitude, interferometer plays an important role in the production of optical lenses, and it is an important instrument for optical profile detection. Based on the polarization Twyman-Green interferometer, the experimental device of surface detection is built. By analyzing the problems in the experimental process, the following improvements are made on the original basis: firstly, when using the dual optical path system to collect fringes, it is found that the interference of air has a great impact on the image quality, so we refer to the principle of Fizeau interference, In order to improve the anti-interference ability of the whole system, the double optical path structure of the Twyman-Green interferometer is combined into a common optical path structure. Secondly, because the detection aperture and surface type will be greatly limited by the standard mirror, so based on the previous research of the research group, this design designs a large F number and long focal length standard mirror for the detection of different lenses, especially the convex mirror. Finally, in order to improve the contrast of interference fringes, a plane mirror film with suitable transmittance and reflectance ratio is designed by using optical coating software to improve the contrast of interference fringes.
干涉仪作为一种波长量级的精密仪器,在光学透镜的生产中起着重要的作用,是光学轮廓检测的重要仪器。基于偏振特怀曼-格林干涉仪,搭建了表面探测实验装置。通过分析实验过程中存在的问题,在原有的基础上进行了以下改进:首先,在使用双光路系统采集条纹时,发现空气的干扰对成像质量有很大的影响,因此我们参考菲索干涉原理,为了提高整个系统的抗干扰能力,将Twyman-Green干涉仪的双光路结构组合成一个共光路结构。其次,由于检测孔径和面型会受到标准反射镜的极大限制,因此在课题组前期研究的基础上,本设计设计了一种大F数和长焦距的标准反射镜,用于检测不同的透镜,特别是凸面镜。最后,为了提高干涉条纹的对比度,利用光学镀膜软件设计了具有合适透光率和反射率的平面反射膜,以提高干涉条纹的对比度。
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引用次数: 0
Nonvolatile silicon photonic 1×2 switch by integrating the phase change chalcogenide into microring network 将相变硫族化物集成到微环网络中的非易失性硅光子1×2开关
Ziyang Ye, Ruirui Song, Shaolin Zhou
Photonic integrated circuits (PICs) as potential candidate to overcome the “von Neumann bottleneck” of current electronic technologies beyond Moore’s law gain increasing applications in fields of optical communication, data exchange and highperformance interconnect networks etc. Currently, elementary active devices such as photonic switches and modulators play essential roles in light-flow control of optical interconnection network, but suffer from high static power consumption because of volatile control and large footprint that is hard to integrate. In this trend, optical phase change materials (OPCMs) based active devices emerge as promising solutions due to advantages of large optical contrast between the amorphous and crystalline states, optically or electrically switchable and non-volatile control, easy to integration etc. In this paper, we propose a non-volatile O-PCMs photonic switch by integrating a thin film of germanium antimony telluride (GST) alloy on top of a micro-ring resonator. As confirmed by our analytical and computational results, upon an amorphous-to-crystalline phase change, two output ports of the O-PCM microring switch exhibit gigantic transmission contrast with a ratio up to highest 47:1. Further, the O-PCM based photonic switch also demonstrates extremely low extinction ration to 13.58 dB and 14.40 dB for both output ports from 1.5 μm to 1.6 μm.
光子集成电路(PICs)作为突破摩尔定律之外的当前电子技术“冯·诺依曼瓶颈”的潜在候选者,在光通信、数据交换和高性能互连网络等领域得到了越来越多的应用。目前,光子开关和调制器等基本有源器件在光互联网络的光流控制中起着至关重要的作用,但由于易失性控制和占地面积大,难以集成,因此静态功耗高。在这种趋势下,基于光学相变材料(OPCMs)的有源器件由于具有非晶态和晶态之间的大光学对比度,光学或电可切换和非易失性控制,易于集成等优点而成为有前途的解决方案。在本文中,我们提出了一种非易失性的O-PCMs光子开关,通过在微环谐振器上集成锗锑碲(GST)合金薄膜。我们的分析和计算结果证实,在非晶相变时,O-PCM微环开关的两个输出端口显示出巨大的传输对比度,其比值最高可达47:1。此外,基于O-PCM的光子开关也显示出极低的消光比,在1.5 μm至1.6 μm范围内,两个输出端口的消光比分别为13.58 dB和14.40 dB。
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引用次数: 0
Circular fringe center location based on local gradient direction estimation 基于局部梯度方向估计的圆形条纹中心定位
F. bai, Xiaohua Zhang, Jun Kong, Xiao-juan Gao, Yongxiang Xu
A method based on the local gradient direction information is proposed to locate the center of circular fringe. The new method is developed which based on the idea that the normal directions of any point on the circular fringe are always pointing towards the center. Besides, the local gradient direction of fringe is related to the normal line of fringe. We deduce theoretically the principle of local gradient direction estimation. Then a new circular fringe center location algorithm is developed with the help of digital image processing technology and statistical ideas. The simulation results show that new method can locate accurately the center of different types of circular fringes with less or without filtering. It also holds good robustness and can meet the requirements of actual engineering application.
提出了一种基于局部梯度方向信息的圆形条纹中心定位方法。基于圆形条纹上任意点的法向总是指向中心的思想,提出了一种新的方法。此外,条纹的局部梯度方向与条纹法线有关。从理论上推导了局部梯度方向估计的原理。然后利用数字图像处理技术和统计学思想,提出了一种新的圆形条纹中心定位算法。仿真结果表明,该方法可以在少滤波或不滤波的情况下准确定位不同类型圆形条纹的中心。具有较好的鲁棒性,能够满足实际工程应用的要求。
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引用次数: 0
Research on photo-alignment process of liquid crystal 液晶光对准工艺研究
Yingru Hu, Ming-hui Gao, Wei Zhao, Qinyi Duan, Shuanghong Wu, Chao Tang, Zitong Hua
In this paper, a kind of photo-alignment materials of liquid crystal with nano-structured is introduced. The samples differ in optical anisotropy, which are subjected to different pre-bake temperatures and different exposure energy. The optical anisotropy are predicted by Secondary fitting analysis. The rationality of the fitting equation was verified by AFM test on the material surface.
本文介绍了一种具有纳米结构的液晶光定向材料。样品的光学各向异性不同,受到不同的预焙温度和不同的曝光能量。通过二次拟合分析预测了光学各向异性。通过材料表面AFM试验验证了拟合方程的合理性。
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引用次数: 0
Optical system design for the 6.5m Southern Spectroscopic Survey Telescope and related multi-object fiber-fed spectrophotometer 6.5m南方光谱巡天望远镜及相关多目标光纤馈送分光光度计的光学系统设计
Hao Tan, Yuefan Shan, Donglin Ma
The Southern Spectroscopic Survey Telescope (SSST) is a planned multi-wavelength sky survey telescope. The main scientific instrument of the telescope is an astronomical spectrometer. In this paper, we present a feasible optic system design based on wide-field Cassegrain corrector configuration for the telescope and related multi-object and fiber-fed spectrograph (MOFFS) system. The latest telescope design has a large field of view (FOV) of 2.6°×2.6° with its image spot size less than 0.3 arcsec in diameter for its full FOV in 80% encircled energy with the atmospheric dispersion effect taken into consideration. The MOFFS system based on the Volume Phase Holographic Gratings (VPHG) has an RMS radius of less than 12μm from center to edge of the fiber slit and the working band from 360nm to 1100nm while having the VPHG diameters less than 120mm. The camera group lens exhibited a transmittance higher than 88% at the whole working waveband.
南方光谱巡天望远镜(SSST)是一个计划中的多波长巡天望远镜。望远镜的主要科学仪器是天文分光仪。本文提出了一种可行的基于宽视场卡塞格伦校正配置的望远镜及相关的多目标光纤馈送光谱仪系统光学系统设计方案。最新设计的望远镜视场为2.6°×2.6°,考虑大气色散效应,在80%的环绕能量下实现全视场,像斑直径小于0.3弧秒。基于体积相位全息光栅(VPHG)的MOFFS系统,当VPHG直径小于120mm时,从光纤狭缝中心到边缘的均一半径小于12μm,工作波段为360nm ~ 1100nm。该相机组镜头在整个工作波段的透过率均大于88%。
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引用次数: 0
Research of sub-aperture stitching algorithm for error correction in aspheric surface testing 用于非球面检测误差校正的子孔径拼接算法研究
Wei Yan, Pei-ji Guo, Xi Chen, Yuting Xu
In the testing of optical surfaces with large aperture or large aperture angle, sub-aperture stitching technology has been developed for a long time, while most testing analysis is for the rotationally symmetrical surface. In view of a cylindrical surface sub-aperture stitching algorithm based on discrete phase data, by using Legendre polynomials to fit the wave surface, numerical simulation and analysis for several main influencing factors have been carried out. For instance, a bicubic interpolation method has been used for non-numerical point in a discrete phase and fuzzy points in overlapping areas during the process of stitching sub-apertures, on account of its accuracy and calculation time. By considering alignment error, random noise, position error, especially rotation error in non-rotationally symmetrical cylindrical surface testing, we stimulate 9 sub-aperture phase data from a measured phase data to analyze the correction coefficient which determines the percentage of error correction in stitching algorithm. While the correction coefficient is approaching 1, the stitching result is most likely overcorrected. In order to achieve the best error correction, the correction coefficient should be set at around 0.6. Furthermore, combined with chaos particle swarm optimization, we reduce the possibility of the algorithm falling into the local optimum, and improve the accuracy of stitching.
在大孔径或大孔径角光学表面的测试中,子孔径拼接技术已经发展了很长时间,而大多数测试分析是针对旋转对称表面的。针对一种基于离散相位数据的圆柱面子孔径拼接算法,采用勒让德多项式拟合波面,对几个主要影响因素进行了数值模拟和分析。例如,在拼接子孔径过程中,对离散相位的非数值点和重叠区域的模糊点采用双三次插值方法,考虑到其精度和计算时间。考虑非旋转对称柱面检测中的对准误差、随机噪声、位置误差,特别是旋转误差,从一次实测相位数据中激发9个子孔径相位数据,分析修正系数,确定拼接算法的误差修正百分比。当校正系数接近1时,拼接结果很可能是过校正。为了达到最佳的误差校正效果,校正系数应设置在0.6左右。结合混沌粒子群算法,降低了算法陷入局部最优的可能性,提高了拼接精度。
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引用次数: 0
Utilization of perylene diimide derivative doped tin oxide as an electron transport layer for performance enhancement of non-fullerene organic solar cell 利用苝酰二亚胺衍生物掺杂氧化锡作为电子传输层增强非富勒烯有机太阳能电池的性能
Tianyu Kong, Pu Fan, Genjie Yang, Junsheng Yu
Achieving high power conversion efficiency (PCE) without compromising device stability is an essential trade-off for commercializing organic solar cells (OSCs). In this study, a novel organic-inorganic hybrid material of tin oxide (SnO2) nanoparticles (NPs) and perylene diimide derivative (PDINO) is introduced as the electron transport layer (ETL) to improve both the device performance and the device stability of non-fullerene OSCs. Compared with the pristine SnO2 NP ETL-based device, not only the PCE of the PM6:IT-4F OSC with SnO2:PDINO as ETL is efficiently improved from 11.3 % to 12.7 %, but the shelf life of the SnO2:PDINO ETL based device is also extended. After being stored in ambient condition without encapsulation for 360 h, the PCE of the modified ETL-based OSC still retains 80 % of its original value. The incorporation of PDINO dopant can provide more favorable interfacial properties between the ETL and the active layer as well as reduced surface defects of SnO2 NP ETL, thus contributing to charge transport efficiency, suppressing molecular recombination, and protecting the active layer from degradation.
在不影响器件稳定性的情况下实现高功率转换效率(PCE)是有机太阳能电池(OSCs)商业化的必要权衡。为了提高非富勒烯OSCs的器件性能和稳定性,本研究引入了一种新型的氧化锡(SnO2)纳米颗粒(NPs)和苝酰二亚胺衍生物(PDINO)的有机-无机杂化材料作为电子传输层(ETL)。与原始的SnO2 NP ETL器件相比,以SnO2:PDINO为ETL的PM6:IT-4F OSC的PCE从11.3%有效提高到12.7%,而且基于SnO2:PDINO ETL的器件的保质期也得到延长。改性etl基OSC在无封装的环境条件下保存360 h后,PCE仍保持其原始值的80%。PDINO掺杂剂的掺入使ETL与活性层之间的界面性能更加优越,减少了SnO2 NP ETL的表面缺陷,从而提高了电荷传输效率,抑制了分子重组,保护了活性层不被降解。
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引用次数: 0
Correction of wavelength error of white-light interference phase-shifting algorithm 白光干涉移相算法波长误差的校正
Yuqin Wang, Rongzhu Zhang
In phase-shifting interferometry, phase unwrapping is an important algorithm for obtaining actual detection data. In general, fringe contrast is approximated to reduce the difficulty of operation. However, in the actual white light interference detection, the fringe contrast will vary with the change of the optical path difference as the wavelength is more abundant. In this paper, the three-step phase-shifting algorithm is taken as an example to derive the phase expression of the white light interference fringe contrast without approximation processing. A hemisphere with a radius of 10μm and an irregular object with a size of less than 6μm are applied to topography reconstruction. Compared with the topography reconstruction error of the three-step phase-shifting algorithm before and after the correction, it has proved that the three-step phase-shifting algorithm after the correction can increase the reconstruction accuracy by about two times, which provides a theoretical method to improve the reconstruction accuracy of the phase-shifting algorithm.
在移相干涉测量中,相位展开是获取实际检测数据的重要算法。一般来说,条纹对比度是近似的,以减少操作的难度。但在实际的白光干涉检测中,随着波长的丰富,条纹对比度会随着光程差的变化而变化。本文以三步移相算法为例,推导了不经近似处理的白光干涉条纹对比度的相位表达式。采用半径为10μm的半球和小于6μm的不规则物体进行地形重建。对比校正前后三步相移算法的地形重建误差,证明校正后的三步相移算法可将重建精度提高约2倍,为提高相移算法的重建精度提供了理论方法。
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引用次数: 0
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International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT)
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