[23] present a simple plasmonic lens composed of an annular slit and a single
concentric groove. The subwavelength groove can scatter the SPPs and constructively interfere to get a far-field focal spot.
The special advantages of the C Grove putter, he explains, are the
concentric grooves on the face of the putter which helps the ball roll smoothly off the face, as opposed to it jumping and skidding.
* "Record grooves" (or ripples or wave marks) are
concentric grooves or lines, usually at the leading edge of flow.
NBMG 11015/1 Massive RG,CG NBMG 11015/2 Massive RG NBMG 11016/1 Laminate CG (?), approximate value; RG, radial grooves; CG,
concentric grooves; CR, concentric ridges; n.o., not observed
Like Mirro's existing Concentric Air line of conventional aluminum cookware, bottoms of pieces have
concentric grooves that control heat distribution, the company said.
A pattern of
concentric grooves -- each 1 micrometer wide and about 0.35 micrometer deep -- cut into the laser's top surface focuses the light to a spot 8 micrometers wide.
Crafted simply from a single block of wood on a turner's lathe, their only decoration, if they had any at all, was restricted to
concentric grooves on the base, or cup, although well-figured wood ensured their beauty.