Rayleigh range ( confocal parameter)
Description
In optics and especially laser science, the Rayleigh length or Rayleigh range is the distance along the propagation direction of a beam from the waist to the place where the area of the cross section is doubled. A related parameter is the confocal parameter, b, which is twice the Rayleigh length or depth of focus
Related formulasVariables
| b | Depth of focus (confocal parameter) (m) |
| π | pi |
| w0 | The waist size (m) |
| λ | The wavewidth (m) |