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- object lens focal length 物镜焦距长度
- If the objective lens is closer to the compact disk than the focal length of the object lens, then the cylindrical lens creates an elliptical image on the photodetector array. 如果物镜与光盘之间的距离短于物镜的焦距,柱面透镜就会使在光电探测器阵列上的成像变成椭圆影像。
- If the objective lens is further away from the compact disk than the focal length of the object lens, then the cylindrical lens again creates an elliptical image on the photodetector array. 如果物镜与光盘之间的距离长于物镜的焦距,柱面透镜也会使在光电探测器阵列上的成像变成椭圆影像。
- By assuming the weak lens focal length expression to be the first term in a power series, a simple and accurate formula can be derived for the objective focal length of a magnetic electron lens. 用假设弱透镜焦距表达式是一个幂级数中的第一项的方法,可以导出相当准确且便于实用的电磁电子透镜物镜焦距公式。
- Making experiment more contents in measuring of lens focal length 丰富测透镜焦距实验的内容
- Measuring the lens focal length with linear array CCD 用线阵CCD测量透镜焦距
- A typical lens has a focal length(f)of 625 mm. 常见镜头的焦距(f)为625毫米。
- Determine the focal length of your lens. 决定你镜头的焦距。
- Fringes thresholding method in the measurement of lens focal length using Moire deflectometer 莫尔偏折法测透镜焦距中的条纹二值化方法
- Improved Method of Calculating Thermal Lens Focal Length in "Top-Hat" End-Pumped Solid-State Lasers 计算“Top-hat”端面抽运晶体热透镜焦距的改进方法
- The focal length of a given lens is different for different colors. 一个特定的透镜的焦距因颜色的不同而不同。
- This photogragh is shot by lens with a long focal length. 这张照片是用长镜头拍摄的。
- The focal length of the camera lens plays an important role in photo criteria. 摄影机镜头的焦距在摄影规范中起着重要的作用。
- Focal length The distance between the centre of a lens and its principal focus. 镜头中心与其主焦点的距离。
- camera lens focal length 照相机镜头焦点长度
- C: Can I control the focal length? 我能控制焦距吗?
- What is the best focal length for bird photography? 拍摄鸟儿最适合的焦距长度是多少?
- lens focal length 透镜焦距
- An image of the object is projected by the object lens on to the photocathode of an image converting tube. 物象通过物镜投影在变像管的光阴极上。
- The focal length of the conelensing lens should be such that the image of the source just fills the projecting lens. 聚光透镜的焦距应使光源的像正好照满放映透镜。
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