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Beam Divergence Formula:
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Beam Divergence is the angle made by the beam incident on surface of metal. It represents how much a laser beam spreads out as it propagates through space, which is a critical parameter in laser applications and optical systems.
The calculator uses the Beam Divergence formula:
Where:
Explanation: The formula calculates beam divergence by dividing the spot diameter by the focal length of the lens. This provides the angular spread of the laser beam.
Details: Accurate beam divergence calculation is crucial for laser system design, optical alignment, and ensuring proper beam focusing in applications such as laser cutting, welding, and medical laser procedures.
Tips: Enter spot diameter in meters, focal length of lens in meters. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What factors affect beam divergence?
A: Beam divergence is primarily determined by the laser's wavelength, beam quality (M² factor), and the optical components used in the system.
Q2: How does beam divergence affect laser performance?
A: Lower beam divergence means the laser beam stays more collimated over distance, which is desirable for long-range applications and precise focusing.
Q3: What are typical units for beam divergence?
A: Beam divergence is typically measured in radians or milliradians (mrad), with 1 radian = 1000 milliradians.
Q4: Can beam divergence be reduced?
A: Yes, beam divergence can be reduced using beam expanders, higher quality optics, and lasers with better beam quality characteristics.
Q5: How does focal length affect beam divergence?
A: Longer focal lengths typically result in smaller beam divergence angles, while shorter focal lengths produce larger divergence angles for the same spot diameter.