空间紫外遥感仪器光谱响应度定标环境的研究

为了减小空间紫外遥感仪器(SURSI)光谱响应度定标不确定度,实现SURSI在轨的高精度探测,对SURSI定标环境进行了深入的分析研究。利用光学薄膜的电磁场理论数值计算出铝+氟化镁膜在250～400nm波段,真空和大气两种环境下的反射率值并进行比对。通过构建SURSI真空/大气响应度比对测试研究系统,对SURSI整机光谱响应度在两种环境下的差异进行了实验研究,在250～400nm波段,平均偏差可达3.8%。理论分析及实验结果表明:受仪器内部光学元件铝+氟化镁膜光学性质的影响,SURSI光谱响应度在真空和大气不同环境下存在明显差异,且偏差值具有波长相关性,直接说明SURSI辐射定标在真空环境下完成的必要性。     

多用途、模块化哈特曼波前传感器的研制

分析了哈特曼传感器的主要设计指标,介绍了设计研制的一种多用途、模块化哈特曼传感器,通过将传感器的主要部件,包括光源、准直镜、分光棱镜、缩束光路、微透镜阵列及相机等进行模块化设计,根据不同需求,对各模块增减或更换,实现了一套传感器多种用途的应用.并用该传感器进行了系统波像差及光学元件面形检测实验,通过与Zygo干涉仪的测...     

Phase diversity for calibrating noncommon path aberrations of adaptive optics system under nonideal measurement environment

When the defocus cannot be measured and the wavefront solution set is restricted by a multi-channel, some practical problems exist in the calibration of the noncommon path aberrations of the adaptive optics system. To solve these problems, an evaluation function of phase diversity algorithm is constructed in this paper. We use the method that the estimated aberration and the modulated deformable mirror iterate each other to make up the nonideal measurement environment. Then the ill-pose problem of the solution by phase diversity, produced as relaxing constraints of the diversity defocus on the wavefront solution set, is solved. We have adopted the proposed method to measure the noncommon path aberrations of the adaptive optics system on a 1.23 m telescope. Experimental results demonstrate that wavefront solution is more accurate and the whole imaging quality is improved effectively by using the deformable mirror to compensate the aberration measured.     

正交投影分光光度法同时测定联磺甲氧苄啶片中的SMZ和TMP

采用正交投影分光光度法同时测定3组分复方药物联磺甲氧苄啶片中磺胺甲恶唑(SMZ)和甲氧苄啶(TMP)二组分的含量。SMZ和TMP的平均回收率分别为99,6％和99．4％,测定结果的相对标准差分别为0,75％和0．60％。讨论了波长区间和波长间隔对测定结果的影响。     

Modeling and analyzing of nonlinear dynamics for linear guide slide platform considering assembly error

It is industry tendency to accurately predict the dynamics of the mechanical systems with full consideration of errors. Based on the Hertz contact theory and general bearing modeling methods, this study proposed a more practical model using numerical method to investigate the influence of assembly error on the dynamics of linear guide slide platform. First, the modeling methods of five types of assembly errors are established, based on which, a nonlinear dynamic model is developed to investigate the influence of assembly error. In consideration of assembly error, the modeling method enables the sum of restoring forces and restoring moments equal to zero when no external load applied to the platform. Second, the simulation results indicate that the assembly error can cause uneven load distribution, change the dynamics of the system. In addition, different from previous research results, the stability of the system cannot be improved by simply increasing the preload. Last, in order to validate the proposed method, the proposed model is compared with previous fewer degrees-of-freedom model, and a series of experiments are conducted on a specialized platform to estimate the parameters of the system and verify the proposed model.

     

桂郁金与桂莪术挥发油的色谱指纹图谱比较

应用化学计量学方法对中药桂郁金与桂莪术挥发油的色谱指纹图谱进行了比较分析。对样品特征峰数据进行奇异值分解,提取第一主成分抽象光谱后,以固定色谱窗口尺寸的另一样品数据构造正交投影阵,用提取的抽象光谱进行投影,移动窗口获取投影残差长度,判定两样品中有无相同的化学成分。经比较,桂郁金和桂莪术的指纹图谱中分别有11和7种化学成分单独存在,两者共有的化学成分有27种。