Rayleigh Length Calculator

Calculate Rayleigh Length



Formula

The formula to calculate the Rayleigh Length (Zr) is:

\[ Zr = \frac{\pi \cdot w^2}{\lambda} \]

Where:

What is Rayleigh Length?

The Rayleigh Length is the distance along the propagation direction of a beam from the beam waist to the place where the area of the cross-section is doubled. It is a measure of how quickly a beam diverges.

Example Calculation

Let's assume the following values:

Using the formula:

\[ Zr = \frac{\pi \cdot 1^2}{0.5} \approx 6.28 \text{ mm} \]

The Rayleigh Length (Zr) is approximately 6.28 mm.