axicon
noun
ax·i·con
| \ ˈak-sə-ˌkän
\
\
plural axicons
Definition of axicon
: an object resembling an optical lens with a conical surface that has no definite focal point
On a trip to Russia, Milchberg discovered that scientists there were using an odd, funnel-shaped “axicon” lens that brought laser beams into an elongated, needle-like focus instead of the sharp point that conventional lenses produce.— Curt Suplee, Washington Post, 11 Sept. 1995
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