The optical correlation function is used to determine the correlation time of atmospheric turbulence, within the time the effect of atmospheric turbulence is taken into account by using the optical transfer function,finally,the optical quality of a large telescope system(with aperture of 500mm,focal length of 500m) is calibrated.
利用大气湍流的光学相关函数确定湍流光学相关时间，并在此时间内通过成像系统的光学传递函数修正大气湍流效应后定标大望远镜（５００ｍｍ口径，５００ｍ焦距）系统衍射极限倍数。
Now there are ten 8- 10m large telescopes have been used for science observation.
目前 ,已有 1 0架口径 8～ 1 0m的地面大望远镜建成并投入科学观测。
Now there are ten 8 - 10m large telescopes have been used for science observation.
目前,已有10架口径8～10m的地面大望远镜建成并投入科学观测。
In order to solve the general problem of nonlinear disturbance in large astronomical telescope servo- control system,the types of disturbance were analyzed in this paper.
在此基础上建立了大型望远镜驱动控制系统的数学模型,提出了高阶滑模控制方案,将系统中存在的不连续性拓展到状态控制的最高阶,抑制系统的高频振动现象,克服了普通滑模控制的缺点数值仿真证明了该方案的可行性和有效性。
a small telescope attached to a large telescope to use in setting the line of the larger one.
装在大望远镜上的小望远镜。
Small telescope attached to a larger one used for locating an object for observation
寻星镜(附加在大望远镜上便於寻找观察目标的小望远镜)
Control Methods for Giant Telescopes Mount Drive System
极大望远镜机架驱动系统的控制策略
the power of a microscope, telescope, etc
显微镜、 望远镜等的放大倍数.
periscope binoculars
潜望镜式双筒望远镜
long focus lens
长焦距（望远）镜头
A measure of the magnification of an optical instrument, such as a microscope or telescope.
倍率光学仪器，如显微镜或望远镜的放大倍数
'Tall tree, Spy-glass shoulder, bearing a point to the N. of N.N.E.
大树，望远镜山脊，方位北北东偏北。
Astronomers watch the stars through big telescopes.
天文学家通过大型望远镜观察星星。
The telescope collapses to half its size.
这架望远镜可以折叠成一半大
What is the range of this telescope?
这架望远镜的有效距离多大?
A large sky area multi-object fiber-spectroscopy telescope
大面积多光区光纤光谱天文望远镜
A Detector System of Atmospheric Cherenkov Telescope
大气切伦科夫望远镜中的探测器系统
Analysis of Similarity on the Cable-cabin Structure of the Large Radio Telescope;
大射电望远镜舱索结构的相似性分析
The lens telescope, or refractor, was vastly improved when it became possible to manufacture high-quality lenses made from flint glass.
透镜望远镜，或称折射望远镜，在人们能够制造出高质量的火石玻璃透镜以后得到了很大的改进。
ultra-low-expansion mirror telescope
超低膨胀率镜望远镜
a binocular telescope microscope ]
双筒目]望远镜显微镜]
A binocular or field glass.
双目镜，双筒望远镜