EFL (mm) : --
BFL (mm) : --
NA: --
$$ \text{EFL} = \frac{n \, D}{4 \left( n - 1 \right)} $$
|
$$ \text{BFL} = \text{EFL} - \frac{D}{2} $$
|
$$ \text{NA} = \frac{2 d \left( n - 1 \right) }{n \, D} $$
|
EFL | Effective Focal Length |
BFL | Back Focal Length |
NA | Numerical Aperture |
n | Refractive Index |
D | Diameter of the ball lens |
d | Diameter of the input source |
Determine the effective focal length, the back focal length, and the effective numerical aperture of a ball lens based on its diameter, its refractive index, and the diameter of the collimated beam entering or exiting the ball lens. The effective numerical aperture of the application can only be calculated if the user knows the beam diameter. Knowing the numerical aperture is particularly useful when using ball lenses to couple light from a fiber to a laser or to another fiber.
或查看各区域电话
报价工具
只需输入商品编号
Copyright 2023, 爱特蒙特光学(深圳)有限公司。— 广东省深圳市龙华工业东路利金城科技工业园3栋5楼 518109 - 粤ICP备2021068591号