共查询到20条相似文献,搜索用时 31 毫秒
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设计并开发了光纤扫描式激光光斑测量仪。光纤探头采用逐行扫描的方式对激光光斑进行扫描,采集的光信号经能量转换、数据采集,最终传输到电脑,再由软件绘制出光斑图像。针对于大口径、脉冲激光光斑的测量提出了一种快速扫描的方案,并在此基础上计算分析了仪器的测量精度和测量时间这两个重要参数。与CCD摄像法进行了对比实验研究,结果表明:相对于CCD摄像法会受到接收屏的散射及成像系统误差带来的影响;此设备采用直接测量的手段,能够更加准确地获得光斑的实际尺寸以及光斑能量的空间分布。应用该仪器成功地进行了聚焦光束传输质量的测量。 相似文献
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中国科学院上海光学精密机械研究所研制的“扫描式投影光刻机”于一九八五年八月廿一日通过了由上海市科委和中科院上海分院联合组织的鉴定。上海光学精密机械研究所采用的是反射式1:1成像镜头,像区为一弧形狭带,通过掩模和硅片同步扫描;使整个硅片曝光。 经专家们鉴定,确认该机的主要技术指标为 最大硅片尺寸 φ75; 光刻分辨率 全片均匀光刻实用线宽为3μm(胶厚 1~1.8μm),目视分辨率为1.5μm; 套刻精度 <1μm; 狭缝照明均匀性 ±5%; 焦深 1.5μm。 扫描式投影光刻机的研制成功,为我国大规模集成电路专用设备填补了一项空白。待 相似文献
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介绍了一种基于扩展外腔和主振荡功率放大架构的780 nm片上集成窄线宽半导体激光器的设计方法.在激光器结构设计描述的基础上,介绍了主振荡功率放大光路设计、隔离器参数设计、尾纤光路设计的方法与仿真结果.基于该设计完成了 780 nm片上集成窄线宽半导体激光器的研制,介绍了参数实现情况,并对基于零拍法的激光线宽测试方法和测... 相似文献
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本文论述用横向剪切干涉仪精确测量光学非球面波象差的方法。用计算机控制干涉相位测量技术,可进行高精度的检测和实时数据分析。本系统主要由有平行平板的横向剪切干涉仪、压电式驱动反射镜、象探测器和具有图象显示的微处理机组成。剪切干涉仪产生与波面导数相应的条纹图,用条纹扫描方法进行分析。对所得数据积分,便可求出波象差。对相对孔径为f/4的非球条面反射镜进行测量,测量精度为1/32λ均方根。 相似文献
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In a previous study, a mathematical model relating surface and bulk behaviours of metals in aqueous solution has been developed. The model was established based on principles of holographic interferometry for measuring microsurface dissolution, i.e. mass loss, and on those of electrochemistry for measuring the bulk electronic current, i.e. corrosion current. In the present work, an optical corrosion meter was built based on the above model. The corrosion meter consists of an electrochemical cell in which the sample is immersed in aqueous solution. Furthermore, the corrosion meter has a holographic camera with a thermoplastic film for in situ processing of holograms in order to obtain real-time holographic interferoms of the sample in the electrochemical cell. Results of the present work indicate that optical holography is a very useful technique for measuring the corrosion current density of different alloys in aqueous solutions. As a result, the corrosion current density of aluminium, stainless steel, and low-carbon steel in 1 M KCl, 1 M NaCl, and 1 M NaOH solutions were obtained. A comparison between the corrosion data of samples showed that the corrosion current density of the stainless steel in 1 M NaCl is nearly three-folds higher than that of the aluminium in 1 M KCl and the low-carbon steel in 1 M NaOH. 相似文献
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由于传统的锅炉汽包水位测量多采用差压式水位计、云母水位计等方法,测量过程中存在汽水分界面不明显,需要温度、压力补偿及投入麻烦等缺陷,为解决上述问题,提出了一种基于电容数字转换技术专用芯片Pcap01的智能多段式液位测量系统,并且应用HART通讯单元访问传感器的测量过程参数、设备组态、校准等信息。对多段电容式液位测量系统的总体方案、传感器设计、电容测量电路、HART通讯电路的设计进行了详细论述,同时设计了HART通讯软件和液位测量采集软件。对所设计的多段电容式锅炉液位测量系统经过试验表明,该液位计精度高、操作简单方便,解决了传统液位测量的缺陷,可以满足实际现场要求。 相似文献
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Gravitational-wave detectors have been well developed and operated with a high sensitivity. However, they still suffer from mirror displacement noise. In this Letter, we propose a resonant speed meter as a displacement noise-canceled configuration based on a ring-shaped synchronous recycling interferometer. The remarkable feature of this interferometer is that, at certain frequencies, gravitational-wave signals are amplified, while displacement noises are not. 相似文献
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We derive schemes to measure the so-called weak values of quantum system observables by coupling of the system to a qubit meter system. We highlight, in particular, the meaning of the imaginary part of the weak values, and show how it can be measured directly on equal footing with the real part of the weak value. We present compact expressions for the weak value of single qubit observables and of product observables on qubit pairs. Experimental studies of the results are suggested with cold trapped ions. 相似文献
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