查询词典 diffraction disk

A detailed calculation on the scattering of a conduct disk is given by means of Incremental Length Diffraction Coefficient method and Phyzical Optics method. The relation between Radar cross section of the conduct disk and the incident angle and the relation between the optimal polarization and the incident angle are investgated and the calculation results from ILDC and that from PO are compared.

用微分边缘绕射系数法和物理光学法对金属圆盘的散射作了详细地分析计算，讨论了其极化散射特性给出了雷达截面积随角度的变化曲线并与用物理光学法计算的结果进行了对比，同时还给出了其最优极化随角度变化时的分布图。

Due to the numerical aperture of DVD pickup is large, and the characteristic size is small, the error of scalar diffraction theory is very large. The in-depth research work on vector diffraction of optical disc was carried out. The optical disk model was analyzed use the rigorous coupled wave theory, and some significative conclusion was obtained. These conclusions can use for guidance of scheme designing of optical pickup.

针对DVD读取头光学系统数值孔径大，光盘特征尺寸小，标量衍射理论误差大等缺点，采用矢量衍射理论对光盘的衍射进行了深入的研究，首次在光学读取头领域中将耦合波理论应用到光盘的衍射分析中，得到了一些有意义的结果，这些结果可以用来指导光学读取头方案的设计。

Diffraction calculation is the basis of designing optical system of optical disk.

文 摘 衍射计算是设计光盘光学系统的基础。

As a natural limit for angular resolution, one may take the angular size of the central diffraction disk.

我们可以取中心衍射环的角直径作为角分辨率的一种自然极限。

The crystal structure,morphology and tribological properties of Ag films deposited at low temperature were analyzed by X-ray diffraction,scanning electron microscopy and ball-on-disk vacuum tribometer,respectively.

利用X射线衍射仪、扫描电镜和真空摩擦试验机对低温沉积银膜的晶体结构、表面形貌和摩擦学性能进行了研究。

A fundamental limit is imposed by the size of the diffraction disk of the telescope.

一个基本的极限是由望远镜衍射园面的大小决定的。

The influence of PDIC position error on the DPD signal is analyzed and computed using the DVD-ROM parameters based on the optic disk scalar diffraction model.

在光盘标量衍射模型的基础上，引入光电探测器的位置误差参数，根据DVD-ROM的盘片参数，计算并分析了位置误差对差动相位探测信号的影响。

According to the diffraction theory used in DVD system, we propose a new theory to analyze the RF signal and tracking error signal of Super-RENS disk. Then we use simulate the tracking error signal under beam aberration. Finally we use FDTD method to simulate the tracking error signal at defocus.

我们亦根据传统光碟片的绕射理论，提出一新的架构用於分析此近场结构，并用此理论进行射频及偏轨信号的模拟；接著探讨在有像差产生的情形下，其对偏轨信号的影响，最后用有限时域差分法验证在失焦下，偏轨信号的变化。

He is the most remarkable man that I have ever known.

他是我知道的人中最值得注意的人。

Increased appearance of lymphocele was noticed in patients with diabetic nephropathy, congenital malformations of the urinary tract, and inflammatory diseases, including glomerulopathy and extraglomerular ones, after high-voltage radiotherapy and after removal of the renal graft.

经过高压放射疗法和切除移植肾后，在糖尿病肾病患者、泌尿系统先天性畸形患者和炎症患者身上发现淋巴囊肿有所增加，包括肾小球病和球外疾病等。