I just received a blue laser as a throwaway free gift in a package of goods totalling about $50. It wasn't even advertised as a freebie in the website, not even at checkout.
It stuns me, because I am an old enough optical engineer to remember the excitement around the first blue laser. Also, who wants one? Not nearly as bright nor energy efficient as a red one (and the battery died with under a minute of use).
It stuns me, because I am an old enough optical engineer to remember the excitement around the first blue laser. Also, who wants one? Not nearly as bright nor energy efficient as a red one (and the battery died with under a minute of use).