Laser: Difference between revisions
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I'd love to build one of these someday. Not easy, but no single part is too hard. | I'd love to build one of these someday. Not easy, but no single part is too hard. | ||
Looking around, copper looks like a good choice for the mirror. I saw instructions for hand polishing a copper mirror, and giving it a slight concave. | Looking around, copper looks like a good choice for the mirror. I saw instructions for hand polishing a copper mirror, and giving it a slight concave. For a lens, rock salt is supposed to work, also needs a polish. | ||
Only part of the project that looks expensive is a neon sign transformer. Other than that, the hardware is pretty cheap. For the gas, CO2 and helium are easy to get, but I need a pure source of nitrogen. It may be enough to burn something in an enclosed space, so long as I could get the smoke particles out. That would leave CO2 and Nitrogen. | Only part of the project that looks expensive is a neon sign transformer. Other than that, the hardware is pretty cheap. For the gas, CO2 and helium are easy to get, but I need a pure source of nitrogen. It may be enough to burn something in an enclosed space, so long as I could get the smoke particles out. That would leave CO2 and Nitrogen. | ||
Revision as of 02:40, 4 April 2016
1w blue laser diodes are fairly cheap. The driver circuits are pretty cheap, or I could build one. Need a heatsink. Some good modules for ~$10. I could probably put the whole thing together for $40.
CO2
I'd love to build one of these someday. Not easy, but no single part is too hard.
Looking around, copper looks like a good choice for the mirror. I saw instructions for hand polishing a copper mirror, and giving it a slight concave. For a lens, rock salt is supposed to work, also needs a polish.
Only part of the project that looks expensive is a neon sign transformer. Other than that, the hardware is pretty cheap. For the gas, CO2 and helium are easy to get, but I need a pure source of nitrogen. It may be enough to burn something in an enclosed space, so long as I could get the smoke particles out. That would leave CO2 and Nitrogen.