为了降低向列液晶调制器的相位延迟漂移影响以提高可调谐液晶双折射滤光器的透过轮廓和谱线定位精度，提出了一种基于傅里叶分析的非线性拟合原位定标方法。该方法从偏振干涉理论出发，利用傅里叶分析获得双折射滤光器每一级的相位偏移量；然后建立相位偏移量与向列液晶调制器相位延迟漂移量的函数模型，最终采用非线性拟合法获得相位延迟漂移量，从而实现双折射滤光器的原位定标。误差分析和实验研究表明，该方法对滤光器的晶体参数以及前置滤光片的误差依赖较弱；测量方法简单便捷，一次测量即可完成定标；相位延迟漂移量的定标精度优于5°，对应双折射滤光器（带宽0.01 nm）的线心漂移量小于0.000 3 nm。

When the collimator is placed horizontally and installed obliquely, its optical parameters will be greatly different due to different stress states. In order to accurately evaluate the focal length of collimator, according to the mapping relationship between the point on the focal plane of the collimator and the angle of the total station, an accurate mathematical model of the relationship between the focal length and the angle of the total station under the condition of oblique installation is established, the principle projection error caused by the rotation of the vertical axis of the total station is corrected. Several groups of data are collected by total station and experimental verification is carried out. After correcting the distortion, the focal length calculated by each testing point when the line segment is parallel to the vertical wire are 1 980.03 mm, 1 983.45 mm, 1 982.79 mm, the average focal length, i.e. the true value, is 1 982.09 mm. When the distortion is corrected but the projection error is not corrected, the focal length calculated from each testing point when the line segment is parallel to the horizontal wire of the reticle is 996.42 mm, 995.23 mm, 995.22 mm, the relative error of the average focal length is 50.2%. The range of focal length calculated by each testing point when the line segment is located in different quadrants and parallel to the horizontal wire of the reticle is 4.74 mm after correcting the projection error and distortion, the average focal length of all testing points is 1982.69 mm, the difference between the average value and the true value is 0.6 mm. The maximum relative error between the extended uncertainty of the focal length calculated by different testing point and the true value of the focal length is 0.36%. This value is far less than the stipulation in GB/T 9917.1-2002 that the relative error between the measured focal length and the nominal focal length in the photographic lens does not exceed ±5%. The experimental results show that the model has universality and high accuracy, the phase of the target slit in the reticle is allowed to be a random value, there is no need to adjust the slit to be strictly parallel to the vertical wire of the total station, the model has great engineering application value for the in-situ detection of the focal length of the collimator under the condition of oblique installation.

针对光纤光栅应变传感器测量桥梁结构应变的准确性问题，提出一种原位校准方法。采用等强度悬臂梁模拟桥梁结构，以砝码为激励源，以电阻应变片作为参考传感器，以光纤光栅应变传感器作为被校准传感器，将这两个传感器安装在靠近的位置进行测量和比对。由于不同传感器特征有差异，被校准传感器的测值序列与参考值序列通常存在数据错位，导致无法判断传感器应变响应的一致性。为此，基于动态时间规整算法的数据序列匹配方法，对电阻应变片和光纤光栅应变传感器的应变数据进行了匹配分析，其数据的匹配率在96%以上。此外，还对数据序列进行了跳点的剔除，避免了突变干扰等因素的影响。结果表明，该方法有效解决了传感器的应变响应是否具有一致性的问题，可以实现光纤光栅应变传感器的原位校准，原位校准结果与静态标定结果基本相同。

针对伽玛射线个人剂量计基于标准伽玛参考辐射进行校准时检定效率低、校准工作复杂和需要远程送检的关键技术问题，建构了1 Ci ¹³⁷Cs放射源小尺度参考辐射场物理模型，采用蒙特卡罗方法，研究了小尺度参考辐射场内的剂量分布、装置结构和待检剂量计变化导致散射射线对剂量场的影响，获得了待检剂量计形状、数量、类型和装置结构产生的散射伽玛射线对小尺度参考辐射量值定度的影响结果。研究结果表明，1 Ci ¹³⁷Cs可以为小尺度参考辐射辐射场检验点提供1.5 mSv/h的伽玛遂行剂量率，辐照个人剂量计载台直径30 cm束斑上的剂量率相对标准偏差约为0.48%。当载台厚度为20 mm时，散射射线对小尺度参考辐射检验点处剂量率值的影响率为3.27%，高于剂量计尺寸（1.62%）和剂量计数量（0.56%）的影响。