- 更多网络例句与主焦点相关的网络例句 [注：此内容来源于网络，仅供参考]
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He used an SBIG STL-11000M CCD camera at the f/3 prime focus of a 16-inch Cassegrain reflector for a total exposure time of 40 minutes.
他在一台16吋卡塞反射镜f/3焦比的主焦点上装置了一个***CCD，用于总计40分钟的曝光。
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Focal length: The distance between the centre of a lens and its principal focus.
焦距：镜头中心与其主焦点的距离。
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A C frame a larger diameter reflecting telescope, through the transformation with different sub-mirror, access to the main focus of the system, Cassegrain system and the fold-axis system.
一C架较大口径的反射望远镜，通过变换不同的副镜，可获得主焦点系统、卡塞格林系统和折轴系统。
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Reflector telescope relative a larger diameter can be done, the main focus of the relative telescope diameter is about 15-125, even greater, Wang DC, inter Newton Telescope, the tube is longer than the system is much shorter focal length, coupled with the main mirror is only one apparent need for processing, which greatly reduces cost and manufacturing difficulties, there is currently greater than 134 meters diameter optical telescopes are all reflecting telescope.
反射望远镜的相对口径可以做得较大，主焦点式反射望远镜的相对口径约为15—125，甚至更大，而且除牛顿望DC远镜外，镜筒的长度比系统的焦距要短得多，加上主镜只有一个表面需要加工，这就大大降低了造价和制造的困难，因此目前口径大于134米的光学望远镜全部是反射望远镜。
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Situated anterior to the frontal bone.
又称前焦点。凸透镜前面的主焦点
- 更多网络解释与主焦点相关的网络解释 [注：此内容来源于网络，仅供参考]
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apocenter：远心点,远主焦点
Apo-Tessarlens复消色天塞镜头 | apocenter远心点,远主焦点 | apochromat复消色差透镜
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apocenter：远主焦点
apocarteresis 绝食自杀 | apocenter 远主焦点 | apochromat 复消色差透镜
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Career Planning：职业计划
职业计划(career planning)是一个人制定职业目标、确定实现目标的手段的不断发展的过程. 职业计划的主焦点应放在个人目标与现实可得机会的配合上. 职业计划不应仅仅集中在晋升集会上,这是因为现在的工作环境已减少了许多这样的机会.
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principal focal distance：主焦距
principal direction 主方向 | principal focal distance 主焦距 | principal focus 主焦点
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principal ideal integral domain：主抱负整环
principal focus 主焦点 | principal ideal integral domain 主抱负整环 | principal inertia axis 主惯性轴
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Pollux m：北河三
Polhodie f.地极(移动)轨迹 | Pollux m.北河三 | Primaerfokuskabine f.主焦点笼
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principal diagonal：主对角线
"主曲率","principal curvature" | "主对角线","principal diagonal" | "主焦点","principal focus"
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principal fibration：主纤化
主因子法 principal factor method | 主纤化 principal fibration | 主焦点 principal focus
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principal focus：主焦点
principal focal distance 主焦距 | principal focus 主焦点 | principal maximum 主极大值
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principal maximum：主极大值
principal focus 主焦点 | principal maximum 主极大值 | principal optic axis 主光轴