The Hubble's primary mirror, nearly eight feet across.
哈勃望远镜的主镜直径将近8英尺。
This is the distance (usually in mm.) from the lens (or primary mirror) to the point where the telescope is in focus (focal point).
就是从透镜(或者主反射镜)到焦点的距离，通常单位是毫米(mm)。
The Thirty Meter Telescope's massive primary mirror has 492 segments, all perfectly aligned to form a 30-meter (98-foot) light-collecting surface.
30米望远镜的巨型主镜分割成了492块，完美地排列从而形成30米(98英尺)的集光面。
18-point-support system is used as axial support in the 1 meter telescope primary mirror.
一米级天文望远镜主镜常采用18点底支承设计，以降低主镜面在重力作用下产生的变形误差。
At last, the back profile of the primary mirror is optimized.
最后对主镜的背部轮廓形状进行了优化。
The special requirement about primary mirror in modern space camera is stated.
叙述了现代空间相机对主镜的特殊要求。
The primary mirror. This is the paraboloidal mirror at the bottom of the tube.
是位于镜筒底部的一块抛物面 镜。
The side supporting method by using the mercury bag, for the 1.2m primary mirror, is adopted.
其中对主镜采用了水银带侧支承的方法。
The primary mirror is 80 cm in diameter, a respectable size even for an observatory on the ground.
主镜的直径为80厘米，这一口径即使在地面天文台也是很可观的。
The technical building is a cylinder construction with a diameterthe size of the 39-metre primary mirror of the E-ELT.
科技楼为圆柱体建筑，直径与欧洲极大望远镜（E-ELT）的主镜直径一致，均为39米。
The technical building is a cylinder construction with a diameter the size of the 39-metre primary mirror of the E-ELT.
技术大楼是一个圆柱状结构，直径与E-ELT主镜直径39米的尺寸相同。
Finally a typical example of lightweight primary mirror is given, which is evaluated comprehensively on optics, mechanic...
最后给出了主镜轻量化的典型应用实例，对其进行了光机热综合评估。
The surface figure precision of the primary mirror in a large aperture telescope is a key factor influencing the imaging quality.
大口径望远镜主镜的面形精度是影响望远镜成像质量的关键因素之一。
A defect in the primary mirror initially caused it to produce fuzzy images; in 1993 another shuttle mission corrected this and other problems.
刚开始时主反射镜的瑕疵造成影像模糊；1993年另一次太空任务修正此瑕疵及其它问题。
The features of preparing the spacial primary mirror with different materials were summarized, and the application and development trend were viewed.
对各种材料主镜的制备特点进行了总结，并展望了今后各种主镜材料的应用和发展趋势。
The mechanics analysis for the primary mirror used in the space camera under the processing conditions is first carried out by finite element method.
本文用有限元法首次对正在加工中的空间相机主镜进行力学分析。
The methods of specification, analysis and evaluation on telescope primary mirror figure error have an important instructive meaning to mirror fabrication.
望远镜主镜面形误差的指标制定、分析以及评价方法对主镜加工具有重要的指导意义。
The two-dimensional quantitative Hartmann tests lor the 1.2m aspherical primary mirror and the 1.2m alt-azimuth telescope at the Yunnan Observatory are performed.
对云南天文台1.2米非球面主镜和1.2米地平式望远镜进行了二维哈特曼定量检验。
Abstract: primary baffle would influence the airflow above the primary mirror, which is not conducive to heat exchange between the mirror's surface and the ambient air.
摘要：遮光筒会影响主镜上方的空气流动，不利于主镜表面与周围空气的热交换。
The main source for structural nonlinearity is summarized, and a FE model for the primary mirror subassembly of a collimator is established on the basis of contact theory.
介绍了产生结构非线性的主要来源，并在接触理论的基础上对主反射镜组件进行了合理的有限元建模。
The primary mirror is an important component of optical system applied on a space telescope, and its thermal optics property is the guideline to thermal design and control.
主镜是空间望远镜光学系统的重要组成元件，其热光学特性将为光学系统的热控设计提供依据。
Around design requirements of the primary mirror, the article mainly introduces the process of the primary mirror material selection and some structure parameter's decision.
围绕主镜的设计约束条件，本文主要介绍了主镜材料的选择和几个典型结构参数的确定。
The work on the technical transform of the mounting system of the primary mirror of the 1.2m alt-az telescope at the Yunnan Observatory is introduced and discussed in this paper.
本文介绍和讨论了云南天文台1.2米地平式望远镜主镜支承装置的技术改造工作。
It is not perfect to estimate the reliability of primary mirror supporting structures in space cameras based on the peak value of stress response at a random vibration environment.
通过随机振动峰值应力响应考核空间相机在随机振动环境下主镜支撑结构的可靠性存在一定的局限性。
With the development of the space optical remote sensor resolution and the primary mirror diameter, the lightweight design is becoming the key technology of the large aperture mirror.
空间光学遥感器分辨率要求的不断提高使其主镜口径也在不断增大，从而对主镜进行轻量化设计就成为空间大口径反射镜工程的关键技术。
In the space camera, the most crucial optical component that affects the spatial resolution is the primary mirror, so the requirements of its surface figure and position precision are very strict.
在空间相机中，对地面像元分辨力起基础决定性作用的光学元件是主镜。主镜作为空间相机中质量最大的光学元件，其面形精度、位置精度要求十分严格。
In the space camera, the most crucial optical component that affects the spatial resolution is the primary mirror, so the requirements of its surface figure and position precision are very strict.
在空间相机中，对地面像元分辨力起基础决定性作用的光学元件是主镜。主镜作为空间相机中质量最大的光学元件，其面形精度、位置精度要求十分严格。
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