球面

ABSTRACT There are many advantages in using aspheric surfaces in optical systems.

在光学系统中应用非球面具有诸多优点，因此非球面在现代科技领域中得到越来越广泛地应用。

Compensation null test is a very important method in testing aspheric surface with high accuracy.

补偿法是高精度光学非球面检测的一种主要方法，本文针对补偿法检测非球面时必需解决的几个关键技术进行了研究，为高精度补偿器的设计与研制成功提供了有力的技术支持。

According to the requirement of the high precision aspheric surface measurement,an effective aspheric surface measurement system is designed and realized.

为满足非球面光学元件表面精度的测量要求，设计和实现了一种高效数控非球面测量系统。

The constructed surface not only has the same structure to the bicubic Coons pacth, but also it can help us to obtain different surfaces by changing the values of the parameters. Furthermore, it can accurately represent torus、ellipsoid and so on.

所构造的曲面不仅具有双三次Coons曲面片的相似的结构，可以通过改变参数，得到不同的曲面片，而且还能精确地表示圆环面、球面、椭球面等二次曲面。

In addition, we use contrast sensitivity and contrast acuity as indicators of visual function and try to investigate: 1 the impact of aging on corneal and total ocular HOAs 2 the change of HOAs after the cataract surgery 3 to compare intraindividually the HOAs and functional vision between implantation of spherical and aspherical IOLs.

二、接受白内障超音波乳化术并人工水晶体植入的病人手术前后角膜及眼球整体高阶像差的变化。三、比较接受白内障超音波乳化术并植入传统球面人工水晶体，或新型态非球面人工水晶体术后高阶像差及视觉品质的不同；并分析其可能影响因子。

After the small incision clear cornea cataract surgery with , the corneal HOAs increase minimally, but the total ocular HOAs increase significantly compare to normal phakic eyes, especially the total 4th order and primary spherical aberrations.

白内障手术前后角膜高阶像差无变化；手术后眼球整体球面高阶像差增加，主要是由於植入传统球面人工水晶体造成。

Our company can also provide customers with non-standard insert bearings with or without housings, as required.

可根据用户的不同要求，向用户提供各种非标准结构的带座外球面轴承和外球面轴承。

The application of the modified Rytov's method to the study of the optical-wave oblique propagation is discussed in this paper. The fluctuation index of the plane wave and the spherical wave is obtained.

将修正的Rytov方法推广应用于研究斜程传输问题，推导了平面波和球面波斜程传输时的闪烁指数，并根据ITU-R湍流大气结构模型，对平面波和球面波在不同传播高度、近地面风速、近地面大气结构常数、零内尺度以及非零内尺度下的闪烁指数进行了理论据导，做出了具体的数值分析。

In this paper, we present the idea of virtual plate for aspheric testing based on moire phase-shifting technology, i.e. when testing steep aspheric wavefronts, interferometry directly used CCD camera for high resolution to obtain supervision with interferometry saved in the frame memory produces moire patterns. Finally, we cancel the noise by means of low pass frequency .

在检测非球面波前时，我们改变以往传统的零位补偿检验手段，而利用高分辨率的CCD相机直接对被检非球面进行数据采样，并把获得的干涉条纹和预先储存在储存器里的参考干涉图进行叠加，从而得到电子莫尔条纹，然后对获得的电子莫尔条纹进行低通滤波，滤掉噪声中含有的高频成分，以提高图像的信噪比。

On the theory of real-time CGH, using LCD, spherical and helical wavefronts are produced real-time, and compared with wavefront whose CGH is recorded by film. An aspheric is tested with real-time CGH.

运用实时计算全息技术，采用液晶板，实时产生了球面、螺旋面波前，经与胶片记录的计算全息图对应比较，其结果良好；并进行了实时计算全息测量非球面的实验。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。