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Many thanks guys, you have been extremely helpful to a laser noob :beer::yh::yh:.

Cheers guys, Odicforce is perfect will deffo use it. budget is around 100 pounds.

hi all, new to the forum for my dissertation im building a photolitography machine (microchip patterning) with a free moving 405nm laser diode and i need to focuss it into the absolute smallest spot. Ive been looking into lenses, ball lenses and fibre coupling it myself. Anyone have any ideas...