TheGr8Revealing said:
Why would it ever be illegal to mail a laser from the USA to the USA??? Are there laws against that?
Mailing, not that I know of. SELLING, yes, that' is covered by FDA rules.
If you manufacture a laser over 5mW, that doesn't have the proper safety features and FDA accession number, then selling it is illegal. FDA rules cover both importing and selling laser in the US.
The one part where I'm fuzzy is when you are the buyer. When you buy a laser that is illegal to import from overseas and get it shipped here, you are classified as an importer, so you are subject to the FDA restrictions. If you are selling a laser in the US, then you are subject to FDA restrictions, even if you are in the US. But, if you are the buyer and buying a laser that is already in the US, then while the seller is subject to restrictions, I'm not sure how liable/culpable the buyer is in that case. Either way, the seller is breaking the law by selling you a laser that is not FDA-approved. But I'm not sure if you, as the buyer, are committing a crime.
Again, there's a very easy way to avoid all this: buy lasers that are FDA approved for import and sale. There are tons that are easily available. Or, buy parts, and build one yourself.