EO Tech Tools

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In addition to our comprehensive archive of Application Notes, Frequently Asked Questions, Glossary terms, and a variety of other resources, we now have technical calculators based on commonly used and referenced equations in the Optics, Imaging and Photonics industries. View EO Tech Tools Equations to see the equations used for each calculation. Should you have any questions, suggestions or need further information, please feel free to Contact Us.

Laser Spot Size Calculator

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Laser Spot Size Equation

Determine spot size of our lasers and laser diode modules from user supplied working distances. Calculator provides circular or elliptical spot size approximations based on 1/e2 beam diameter and beam divergence; for lasers, beam diameter is given for TEM00 mode. Spot size visibility varies based on ambient light conditions.

 
Input Beam Diameter, DI (mm) --     
Beam Divergence, θI (mrad) --     
Working Distance, L
Output Beam Diameter, DO (mm)
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Note: This list is updated periodically and may not reflect our most current laser and laser diode product offerings.