Beam Expanders, PHYS 352

Principles of the Galilean beam expander are described along with a sample optical design and analysis using ray trace equations in an Excel spreadsheet.
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[@captainspire9094]

I have been looking for this for a year! I remake old toys using those 5v green laser diodes and sometimes it's night er have a slightly thicker laser beam. But I just couldn't figure out which type of lenses to get! Now I do. Thank you.