Intraocular lens (IOL) based on metasurface

An intraocular lens (IOL) based on a metasurface, comprising:

• a front optical lens,
• a rear optical lens,
• an equatorial plane, and
• an optical loop,
• wherein the front optical lens and the rear optical lens are connected through the equatorial plane, the optical loop is connected with the equatorial plane, and a metasurface structure is arranged on the equatorial plane;
• and the metasurface structure comprises a plurality of nanostructure units with a phase distribution of a planar axicon lens;
• the each of the plurality of nanostructure units, φaxicon is the phase distribution of the planar axicon lens, and * is a multiplication sign;
• and
• the phase distribution formula of the planar axicon lens is:
• {
• φ
• axicon
• =
• x
• 2
• +
• y
• 2
• *
• 2
• ⁢
• π
• /
• λ
• *
• sin
• ⁢
• β
• β
• =
• tan
• -
• 1
• (
• R
• /
• f
• )
• ,
• wherein φaxicon is the phase distribution of the planar axicon lens, x and y are position coordinates of a two-dimensional coordinate system with a center of the planar axicon lens as an origin respectively, λ is an incident wavelength, f is a focal length corresponding to a maximum aperture R of the metasurface structure and is a focal length under static refractive power +58.64D, and β is a maximum angle corresponding to the metasurface structure.