共查询到16条相似文献,搜索用时 109 毫秒
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波片相位延迟量精密测量新方法 总被引:18,自引:7,他引:11
利用旋转波片的偏振干涉技术,结合机械-光学旋光调制器对光相位的调制,通过判断方波信号的有无,可精密地确定被测定片相位延迟的数值,机械-光学旋光调制器的使用,大大简化被测样品和测试装置中四分之一波片光轴方位的调整,也显著地提高了装置测量的灵敏度和波长测量范围,对环境不作特殊控制,依据本方法建立的测试装置的相对测量误差可小于千分之五。 相似文献
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本文对波片温度和入射角灵敏等特性进行了分析介绍。为便于系统了解,同时提供了目前国内外波片的制造和测试情况以及波片在光学设置中的调整使用方法。波片是偏光技术应用中的重要器件。我们在实验教学中常遇到波片的使用问题,学生普遍存在着对波片性能和指标不甚了解。例如:学生对一块波片,常象对待一般光学 相似文献
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红外波片相位延迟的测试方法及精度分析 总被引:8,自引:1,他引:7
通过全面分析光强随波片方位角的变化从中优化出可适用于红外波段的确定波片延迟的方法。此方法只需读取输出光强的最大值和最小值,通过简单运算得到所测波片的相位延迟。以此为理论基础,建立了一套红外波片检测系统,此系统使用元件的数量较少,操作简单,重复性好,易于得到较高的测试精度。此外,从系统光源、光学元件到接收器件等组成部分分析了整个系统中各种误差源对测试精度的影响。结果表明,该系统的检测精度与波片延迟有关,并给出其关系曲线,由该曲线可知,当所测波片的延迟大于40ο时,该系统的仪器相对误差在1%之内,对于常用1/4和1/2波片,仪器相对误差分别为0.2%和0.01%。该检测系统的测试精度在可见和近红外波段基本保持不变。 相似文献
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Hsiu-Fong Chang Chien Chou Hui-Kang Teng Hsieh-Ting Wu Hon-Fai Yau 《Optics Communications》2006,260(2):82-426
A novel common-path polarization modulation and amplitude-sensitive optical heterodyne polarimeter is setup in order to characterize a phase retardation plate (PRP) in real time. The phase retardation ΔΦ and fast-axis angle β of the linear birefringence parameters (LBP) of a PRP are measured simultaneously. Meanwhile, the dynamic ranges of 0° < ΔΦ < 180° and 0° < β < 180° are demonstrated experimentally. In order to measure LBP in real time, a polarization modulation is introduced by continuously rotating the tested PRP such that ΔΦ and β are able to be obtained in terms of the ratio of the amplitudes of S polarization and the ratio of P polarization of the heterodyne signals, respectively. Consequently, this novel method, which combines optical heterodyne interferometry with a polarization modulation technique, not only improves the detection sensitivity, but also provides a real time capability to measure LBP. In addition, the error in the LBP measurement is derived and analyzed. 相似文献
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微楔形镜的加工不能像平行平面元件那样,采用大块抛光,切片分割的办法。针对零件尺寸小、精度要求高的特点,研究了加工过程中的粘结上盘、面形精度控制和楔形角检测等技术,设计了吸附式粘结上盘和楔形角测量等专用装置,应用于尺寸为3×3×1mm(6°)的Nd∶YVO4(掺钕钒酸钇)晶体批量生产中,提高了零件的面形精度和加工可靠性。测试结果表明:面形精度优于λ/10(λ=632.8nm),表面光洁度达0/0级,楔形角合格率达98%以上。 相似文献
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A simple method for simultaneous determination of the phase retardation and fast axis of a wave plate is presented. In this method, double light path compare system is adopted to achieve better accuracy. In the main optical path, laser beam passes successively through a polarizer, a wave plate to be measured, an analyzer, and then is incident on a detector. In the reference optical path, another detector is used to monitor the fluctuation of the light source. With rotation of the wave plate, the maximum and minimum output light intensity, rotation angle of the wave plate are detected in the main light path; corresponding light intensity are simultaneously detected in the reference light path. Based on the light intensity and the rotation angle, the phase retardation and fast axis of the wave plate can be determined simultaneously. The main advantage of this method is its simplicity of apparatus, easy operation, low cost, and high accuracy. We believe that the method reported in this paper should be a useful approach to measure a wave plate without requiring any complex and expensive components. 相似文献
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分振幅型全Stokes同时偏振成像仪具有实时性好、空间分辨率高、精度高等优点,有很高的应用价值.分振幅型全Stokes同时偏振成像系统利用偏振分束器、1/2波片和1/4波片将入射光Stokes矢量调制在4幅图像中,可解析入射光Stokes矢量. 1/2波片和1/4波片的相位延迟误差对Stokes矢量测量精度有着不可忽略的影响.建立了包含上述两种误差的Stokes矢量测量误差方程,分析了1/2波片和1/4波片相位延迟耦合误差对自然光、0°/45°线偏光、左旋圆偏光等典型基态入射光的Stokes矢量测量误差的影响,推导了任意偏振态的Stokes矢量测量误差的表征方法.在邦加球球面和球内选取不同偏振度的Stokes矢量作为入射光进行仿真.结果表明, Stokes矢量测量误差和偏振度测量误差均随着入射光偏振度的增大而增大.选取入射光偏振度为1时的偏振测量精度评估系统.为满足2%的偏振测量精度, 1/2波片相位延迟误差应在±1.6°内, 1/4波片相位延迟误差应在±0.5°内.这对提高系统的偏振测量精度具有重要意义,为系统设计和研制提供了重要的理论指导. 相似文献
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Zheng Ping Wang Qing Bo Li Qiao Tan Zong Jun Huang Jin Hui Shi 《Optics & Laser Technology》2004,36(4):285-290
A novel and simple method used for measurement of retardance of a quarter-wave plate employing two polaroids and a right-angle prism is reported. The theoretical analysis of the principle is given taking the Jones matrix as a mathematical tool. The uncertainty of the method is theoretically analyzed. An application example is also given. The measured result of the example is verified with a test. The main advantage of this method is that it can completely determine the retardance value, which overcomes the shortcomings of the existing methods reported before for determining only the multi-value function values, such as cosine or tangent value of the retardance. In addition, this method is also accurate, easy to operate and can also be used for the retardance measurement of other retardation plates. 相似文献