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- focal length of thermal lens 热焦距
- Determine the focal length of your lens. 决定你镜头的焦距。
- Focal length difference at different radii of the thermal lens is analyzed simply. 初步计算了晶体热透镜不同径向位置处的焦距差。
- 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。
- 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。
- Determination of thermal focal length of diode laser end-pumped solid-state amplifier 二极管端面抽运的固体激光放大器自身热透镜焦距测量
- Measurement of thermal focal length of LD-end-pumped crystal under stable-cavity-condition 利用稳腔条件测量LD端面泵浦激光晶体的热焦距
- 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。
- The ratio of the focal length of a lens or lens system to the effective diameter of its aperture. F值物镜或物镜系统的焦距与入射光孔直径之比
- The automatic adjustment in the focal length of the lens of the eye to permit retinal focus of images of objects at varying distances. 眼调节眼睛瞳孔对焦距的自动调节，以获得不同距离的物体在视网膜上的成像
- The Manfrotto 303 also allows the user to set the degree of camera rotation set in relation to the focal length of the lens being used. 曼富图303云台还可允许用户设定相机旋转角度和配套的镜头焦距长度。
- Camera shake rule： The slowest shutter speed at which you can safely handhold a camera is one over the focal length of the lens in use. 手持拍摄时，最低安全快门速度为所用镜头焦距的倒数，低于这一速度，相机震动可能导致照片的锐度下降。
- It is shown that by changing the focal length of focal lens and the distance between the axicon and the lens, the center of dark of the bottle beams can be altered effectively. 这些结果表明，改变聚焦透镜的焦距和聚焦透镜到轴棱锥间的距离以及光阑半径，可有效地改变局域空心光束的暗中空区域。
- 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。
- A typical lens has a focal length(f)of 625 mm. 常见镜头的焦距（f）为625毫米。
- 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。
- 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。
- A model which treated the active medium as a thick lens was established to analyze the effects of thermal lens in the resonator. By using the matrix method, the equivalent resonator performance was studied. 将kHz高功率固体激光器增益介质当作厚透镜处理,建立了热透镜效应分析的理论模型,使用矩阵的方法对等效热透镜腔进行分析。
- 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
- In the measurements,the focal lengths of positive and negative lens are determined by the tilt angle, of the Moire fringe. 在测量中，根据莫尔条纹的斜角确定正、负透镜的焦距。
