Synthetic sapphire balls are used for precision ball bearings. For one example see <>
They are not expensive only $1 to $2 each.
Victoria Welch <wrlabs@...> wrote: On Saturday 14 April 2007, Malcolm Parker-Lisberg wrote:
> The saphire ball bearing makes an excellent lens for a diode laser.
I suppose so, but outside of my roomie and her bead mill I have no idea
were to even start looking for something like that.
Would probably also add considerable value to a $1 laser pointer
too :-)!
Thanks & take care, Vikki.
--
Victoria Welch, WV9K/7
"Experience should teach us to be most on our guard to protect liberty
when the government's purposes are beneficient . . . the greatest
dangers to liberty lurk in insidious encroachment by men of zeal, well
meaning but without understanding." -- Justice Louis Brandeis
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