The word teleidoscope is a hybrid of the words "telescope" and "kaleidoscope" — a kaleidoscope that turns whatever you point it toward into a radial pattern.
Is this cool, or what? I had no idea such a thing existed, though after the fact it makes perfect sense. [slow brain icon]
It tells more about it in the link below; and, I recommend that anyone with an interest in art try the home page--there's also a free web page translator available, though I did not try it and thus can't say how accurate it is or isn't.
Artlex
Note--there are a couple of ads on the page.