您要查找的是不是：
- Experimental Study of Two-dimensional Orthogonal Segmented Wedge Array Optical System Applied to Uniform Illumination of Large Focal Spot 二维正交光楔列阵大焦斑均匀照明光学系统的实验研究
- large focal spot 大焦点
- Using spherical wave beam to illuminate an axicon will result in a beam with small central spot and large focal depth, which is useful for laser communication and long-distance measurement. 由于球面波入射圆锥透镜所产生的出射光束具有焦深长和中心光斑直径较小的特点,适合激光通信以及长距离测量。
- Combined with SSD, the new CPP have the better effect for controlling focal spot than the CPP designed by "standard" method. 进一步分析表明，新方法设计的CPP与光谱色散匀滑技术耦合的效果更佳。
- In order to be able to evaluate a large focal length range, different converter lenses must be used. 为了能够计算较大的焦距范围,根据焦距的大小必须使用不同的转换透镜。
- Under the different laser parameters,the electron energy gain depends on the laser intensity,focal spot size and pulse width. 不同激光参量条件下,得到了电子的能量增益与激光强度、焦斑大小和脉冲宽度关系。
- The unsteadiness of air becomes prohibitive only if instruments with large focal length are used. 只有在使用长焦距的仪器时，才不允许空气的不稳定。
- The excursion of centroid position of focal spot may be easily acquired with the centroid position expression of focal spot. 利用焦斑质心位置表达式，可分析和确定由于振幅调制和相位畸变导致的质心位置偏移。
- Due to optical diffraction limits, the focal spot size is influenced by the incident wavelength and the numerical aperture of a lens. 摘要:由于光学绕射极限的限制，聚焦光点受到入射光波长及透镜数值孔镜的影响。
- Abstract he method of measuring the focal spot size of X-ray source was designed by using a monolithic glass polycapillary X-ray collimator (MGPXRC). 摘要 设计了一种测量X射线光源焦斑尺寸的方法：多毛细管准直器法。
- The centroid position of the focal spot directly depending on intensity distribution and phase slope distribution of near field is derived, and its physical meaning is described. 进一步推导了焦斑质心位置对光束近场强度分布和相位斜率分布的依赖关系式，并对该式清晰的物理意义进行了阐述。
- There are two critical values for outer radius of the inner annular zone, at which focal spot changes sharply.The tunable range of the focal depth is very considerably. 增大内圆环的外半径，焦深沿轴向变大，相位板可以调节光学焦深，并且可调的范围很大。
- Focal spot to image receptor distance 焦点至影像接收器距离
- He bit off a large piece of the apple. 他咬下一大块苹果。
- Investigation of Controlling X-Ray Tube Focal Spot X射线管焦点控制研究
- Large billboards have disfigured the scenery. 大型告示板已破坏了景色。
- He has a large amount of mail to answer every day. 他每天有大量的信件要回复。
- His large income enabled him to live in comfort. 他那丰厚的收入使他可以过舒服的生活。
- Centroid position of focal spot of laser beam with aberration 畸变光束的焦斑质心位置
- He cooked the pasta in a large pan of boiling water. 他用一大锅开水煮义大利面食。
