EFL：有效焦距
“有效焦距”（Effective Focal Length）在光学和摄影领域是一个常用术语，通常缩写为EFL，方便书面及技术交流中的快速表达。这一术语广泛应用于镜头设计、成像系统分析等多个综合性技术场景中，用于描述镜头或光学系统对光线实际聚焦的能力，其核心含义是指等效于理想薄透镜的焦距值。
Effective Focal Length具体释义
Effective Focal Length的英文发音
例句
- On the radial alignment constraint condition, the image scale factor has been calibrated. The camera external parameters effective focal length and the radial lens distortion can been calibrated with one image.
- 在考虑径向准直约束的条件下，利用预先标定好的图像尺度因子，采用一幅图像对摄像机的外部参数、有效焦距(EFL)、径向畸变进行标定，标定过程中，每一步均用线性方程组求解。
- The theoretical analysis of stimulated emission process revealed that this experimental result was caused by the reason of energy level splitting. ( 2 ) We experimentally analysed the spot size of terahertz after focused by different effective focal length of off-axis parabolic mirror.
- 通过对受激辐射过程的理论分析，得出能级分裂导致是导致这一实验现象的直接原因这一结论。（2）分析了不同焦距的离轴抛物面镜对太赫兹光束的聚焦效果。
- A new error correction method for camera calibration is described. Firstly, a new radial lens distortion model is proposed, and a linear algorithm for calibrating the effective focal length, radial distortion coefficient and Z component of the translation vector is given.
- 本文针对摄像机成像误差问题，首先提出了一种新的径向畸变模型，利用此模型推出了能精确标定摄像机的关键参数（有效焦距(EFL)、平移矢量的Z向分量以及径向畸变系数）的线性算法；
- The effective focal length and back working distance of the system are respectively 100 mm and 113 mm, while the F number is 2.0.The system which has only three lenses contains two negative germanium lenses and one positive zinc selenide lens.
- 该系统全视场为14°，有效焦距(EFL)为100mm，后工作距为113mm，F/2.0.系统采用锗和硒化锌两种材料，为三片镜结构。
- A Camera Calibration Method of Varying Effective Focal Length(EFL) by Neural Network
- 用神经网络变易有效焦距(EFL)的摄像机标定法
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