Figure 1
From: Planar binary-phase lens for super-oscillatory optical hollow needles
The optimized binary phase (i.e., 0 and π) distribution of the super-oscillatory lens with radius of 650λ for wavelength λ = 632.8 nm, where R is the radial coordinate and the rectangle blocks give the corresponding position and width of the 292 ring belts with phase of π. The ring belts located between two neighboring rectangle blocks have phase of 0.
