超精密金刚石刀具──衍射光栅刻划刀

衍射光栅是一种非常精密的光学元件。它们通常是用金刚石刀具刻划的。为了使光栅有较高的衍射效率,金刚石刻划刀应有精确的角度。正确选择金刚石晶格的方向对提高刀具的寿命非常重要。光栅刻划刀刀刃的粗糙度好于8nmRa.     

SPD-Ⅰ型全息凹面衍射光栅平场多色仪

报道一种利用象差校正平场全息凹面衍射光栅作为分光和成象元件的平场多色仪，该多色仪具有谱面平直、使用波段宽、集光本领强、体积小等优点。     

偏心对光栅副性能的影响

光电编码器在计测、自控、机床、计算机、机器人等行业中有广泛应用,其核心部件是光栅副。本文对光栅副中的动光栅因偏心而带来的对精度、条纹宽度、相位变化等参数的影响作了详细的分析,可以看到偏心对这些参数有比较大的影响,因而在调整过程中,力争把动光栅中心调整得与其旋转中心同心。     

离子束刻蚀计量光栅的衍射现象

介绍了计量光栅经离子束刻蚀后的衍射现象,实测了刻蚀表面的形貌特征,还对这种衍射现象进行了讨论。     

光纤光栅传感器原理与应用及其发展趋势

本文介绍了光纤光栅传感器原理、种类以及系统组成,并对其应用和发展趋势进行了探讨。     

增量式光电旋转编码器及在角减速度测量中的应用

介绍了增量式光电旋转编码器的原理、结构，根据输出信号的特征提高测量精度的四倍频处理方法，在此基础上说明了常用的基于编码器的输出信号的测速原理、方法。最后给出了基于增量式光电旋转编码器进行角减速度测量的系统构成，实际应用精度要求采用的最小二乘拟合法的处理方法。     

An improved accuracy-measuring method in manufacturing the lead screw of grating ruling engine

A measuring method was studied to further improve the manufacturing accuracy of the lead screw. Firstly, factors that can axially displace the screw shaft were analyzed and a relationship between factors and axial displacement was given. The axial displacement of the screw shaft was measured using a laser interferometer, and results show that the variation amplitude of the screw-shaft axial displacement was about 80 nm while the variation period was consistent with the rotation period of the screw shaft. Next, two methods of measuring the manufacturing accuracy of the lead screw were considered: a traditional method that measures the absolute position of the nut and an improved method that measures the displacement between the nut and screw shaft. A No. 4 screw shaft was manufactured under the guidance of results obtained using the improved measuring method. Experimental measurements were then made; results show that the pitch displacement errors obtained using the traditional and improved measuring methods were 0.6 and 0.4 μm, respectively, indicating that the improved measuring method is more exact. Finally, an echelle grating ruled by a grating ruling engine that used the No. 4 screw shaft as a macro-positioning element was introduced. Its excellent parameters indirectly show that the improved measuring method has better accuracy.     

基于单元平均应变的结构多损伤静态识别

利用长标距布喇格光纤光栅（FBG）传感器，可以测量结构一定长度的平均应变。在介绍单元平均应变的基础上，采用单元平均抗弯刚度和广义单元平均中性轴高度作为识别参数，通过工字形悬臂钢梁和简支钢梁的多损伤数值模拟进行了验证，说明基于单元平均应变的结构静态损伤识别方法是可行的。     

基于F-P滤波器的光纤光栅振动传感解调系统的研究

光纤光栅传感技术较其它传感技术有其独特的优点,在振动传感中有很大的发展前景。文章提出了一种利用法布里-玻罗腔作为滤波器,将FBG传感振动信号产生的Bragg波长的漂移转化为F-P滤波器透过光强度的变化来传感解调的方法,通过实验验证,可知该方法能克服相位型光纤振动传感器和匹配光纤光栅振动传感器的一些缺点,性能稳定,价格低廉,精确度高,具有较高的实用价值,有望在实际应用中推广。     

石油产品芳烃含量在线紫外分析仪的研制

研制了一种可用于石油产品中芳烃含量在线检测的紫外分析仪,仪器采用凹面全息光栅双单色仪和独特的进样系统,可保证吸光度高达7Abs的润滑油样品在石油生产现场不经稀释即可进行在线分析检测。经五年多工业现场使用,准确率达95%,无故障运行率达97%以上。为润滑油生产过程质量监测、优化操作,为光谱技术在石化工业应用开辟了一条新路。