Our free online Laser Brightness Calculator helps you quickly determine the irradiance (intensity) of your laser beam. Simply input the laser power and beam diameter to get results in Watts per square centimeter (W/cm²). Essential for ensuring laser safety, optimizing industrial processes, and conducting precise scientific research. Understand your laser's true power density.
Formula:
The Laser Brightness Calculator determines the irradiance (E) of a laser beam, which is the optical power incident per unit area. For a circular beam, the formula is:
E = P / A
Where:
E= Irradiance (Watts per square centimeter, W/cm²)P= Laser Power (Watts)A= Beam Area (square centimeters)
For a circular beam with diameter D, the area A = π * (D/2)2. Substituting this into the irradiance formula gives:
E = P / (π * (D/2)2)
Which simplifies to:
E = (4 * P) / (π * D2)
Where P is in Watts and D is in centimeters for a result in W/cm².