| 1. | 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。 |
| 2. | Step 3 : center your primary mirror ' s sweet spot in the eyepiece ' s field of view
把主镜的甜点调整到目镜视场中。 |
| 3. | Manufacturing of large aspherical primary mirror is one of the key technologies for optics
大口径非球面主镜的加工是光学制造里的关键技术之一。 |
| 4. | It used to apply only to reflecting telescopes in which the primary mirror was a paraboloid , and thus capable of forming an image all by itself
它过去只用在抛物面反射望远镜上，这种镜子只用主反射镜就能成像。 |
| 5. | Before long , astronomers found that the images sent back by hubble were blurred due to a mistake in the grinding of the primary mirror
可是不久，天文学家即发现哈勃拍摄出来的影像模糊。原来哈勃的主镜片在磨制时出现误差。 |
| 6. | At the same time , this paper pointed that the topological optimization method can be used in the lightweight design of the back contour of the primary mirror
同时本文还提出，可用拓扑优化的方法进行主反射镜镜背的轻量化设计。 |
| 7. | Each primary mirror will focus its photons onto a separate , 1 . 1 - meter secondary reflector , a thin membrane attached to 672 actuators
每一面主镜都会将光聚焦在另一面直径1 . 1公尺的次要反射镜上，反射镜是接有672个调节器的一片薄膜。 |
| 8. | The dynamic analysis indicates that the design of the primary mirror assembly is good . the design of the primary mirror assembly meets requirements
主镜组件有限元模型动力学分析表明，本文设计的主镜组件足以抵抗动力学环境载荷的影响。 |
| 9. | The primary mirror . this is the paraboloidal mirror at the bottom of the tube . it has an aluminized surface that reflects starlight to form an image at the focal plane
主镜。是位于镜筒底部的一块抛物面镜。表面镀铝膜，将星光反射到焦平面上成像。 |
| 10. | With your eye close to the focuser , you can see the primary mirror reflected in the secondary , and the secondary and its spider in turn reflected in the primary
把眼睛靠近调焦座，你会看见副镜中有主镜的反射像，而副镜和它的支架也在主镜中有反射像。 |
