查询词典 aspheric

In view of methods for calculating asphericity of optical aspheric surface are nonuniform, a least maximum residual error method for calculating asphericity of high-order optical aspheric surface is proposed on the basis of analyzing common calculating methods.

针对现有光学非球面度计算方法不统一的问题，在分析常用方法特点的基础上，对於高次光学非球面度的计算提出最小最大残差法。

Discussion is made to some properties of aspheric surface. A novel method is presented to define and calculate the best fitting sphere and the asphericity of high order aspheric surface. Thus, the asphericity calculations of the conicoid and high order aspheric surfaces are unified.

在本文中，对非球面的一些性质进行了讨论，提出一种新的高次非球面的最接近球面及最大非球面度的定义和计算方法，实现了轴对称的高次非球面和二次非球面的非球面度计算的统一。

Through finding a best fitting spherical surface, making the maximum deviation between aspheric surface and the best fitting spherical surface minimum, the maximum deviation at this time is just the maximum asphericity of aspheric surface.

寻找最接近球面，使其沿法线方向与非球面的最大偏离量最小，此时的最大偏离量即为非球面的最大非球面度。

Through evolving technology ABBA developed four Aspheric Multifocals, three Translating Bifocals and a hybrid aspheric translating bifocal.

通过不断的技术开发4利群非球面Multifocals，三个翻译双光眼镜和混合双焦非球面翻译。

Based on the aspheric off-axis reflection projection system, the Zernike free form surface was adopted to replace the aspheric surface in order to further optimize the system structure. The relationship between Zernike polynomial and Seidel aberration was utilized to improve the system performance.

基于非球面离轴反射式投影系统，提出了采用Zernike自由曲面取代非球面进一步优化系统结构的设计方法，并利用Zernike多项式与Seidel像差之间的关系，优化系统的成像性能。

The off-axis reflection system composed of four aspheric mirrors was designed, but the system structure was not so simple and the performance can also be improved, besides, manufacture and test for large aspheric mirrors are difficult; and then the spherical Fresnel mirror which is easier to be manufactured and tested was used to replace the aspheric mirror, the spherical Fresnel mirror has low cost of replication, but this design also can\'t be used in projection lens because it was only feasible in narrow wavebands; Furthermore, the design making use of catadioptric projection lens was accomplished, this design is greatly applied in rear projector because it has merits of both refraction and reflection. But it had difficulties in color aberration correction and had complex structure.

设计了四片非球面组成的离轴式反射系统，然而，仅采用非球面设计系统结构不够精简，性能也有待进一步提高，且非球面面形较大时加工和检测都存在一定的困难；继而提出了用球面Fresnel反射镜代替非球面的设计方法，虽然Fresnel反射镜加工和检测更为简单，且复制成本低，但对波长具有选择性；进而，应用折反系统结合的方式设计了离轴式投影镜头，该方法因兼具折射和反射的优点，在大屏幕超薄背投系统的设计中广为应用，缺点是会产生难以校正的色差，且结构复杂。

In this paper, a new method for aspheric conicoid machining is offered by using normal equidistance line offsetting methods.1、Obtain ecumenic equation of normal equidistance offsetting line methods for aspheric conicoid machining induced from mathematical equations of paraboloid, hyperboloid and ellipsoid surface; reason the conditions for avoiding of tool intervening.2、Bring forward the general design project for machining tool together with some primary components based on the conception of non-sphere conicoid machining by using normal equidistance line offsetting.

其主要内容有： 1、进行了二次旋转曲面法线等距离线加工方法的理论研究，分别建立了抛物面、椭球面和双曲面的法线等距离线模型，得出了避免加工过程中刀具干涉的必要条件。 2、根据法线等距离线加工法的理论，确定了二次旋转曲面加工机床的总体设计方案，并进行了零部件的选择。

The requirement of machining technology of aspheric surface optics parts by NC machine with Nanosys--300 aspheric surface ultraprecision compound machining system for single point diamond turning is introduced.

介绍了用金刚石单点车削的方法在&Nanosys--300非球面曲面超精密复合加工系统&数控机床上加工非球面曲面类光学零件时对加工工艺的要求。

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。

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。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。