The formula to calculate the Beam Field Angle is:
\[ BFA = 2 \times \arctan\left(\frac{D}{2d}\right) \times 57.2958 \]
Where:
The Beam Field Angle (BFA) is the angle that defines the spread of the beam of light or other radiation from its source to the target. It is calculated based on the diameter of the object being illuminated and the distance from the source to the object. A larger angle indicates a wider beam spread.
Let's assume the following values:
Using the formula:
\[ BFA = 2 \times \arctan\left(\frac{1}{2 \times 5}\right) \times 57.2958 \approx 11.42 \, \text{degrees} \]
The Beam Field Angle is approximately 11.42 degrees.