natural slap echo echo echo echo

[Ian Fritz]

Entirely different. These are semiconductor diode lasers shaped like a ring
or disc. The optical path carooms around and around.

  Ian

----- Original Message -----
From: KA4HJH <ka4hjh at gte.net>

> Inside an elliptical reflector, put the flashtube at one focus and
> the lasing medium (ruby rod works well) at the other. Or is this
> something entirely different?
>
>
> Terry Bowman, KA4HJH
> "The Mac Doctor"