Metalens array and wavefront sensor system

A wavefront sensor system, wherein the wavefront sensor system comprises:

• a metalens array, a first sensor and a second sensor;
• wherein, the metalens array comprises:
• at least one metalens array unit, and the metalens array unit comprises:
• a plurality of transmittive metalens at different working waveband;
• and
• at least one reflective metalens;
• the first sensor comprises:
• a plurality of first sensor units;
• the plurality of tansmittive metalens with the same focal length are used for focusing incident lights of different wavelengths to the corresponding first sensor unit of the first senor;
• the arrangement of the first sensor unit corresponds one to one to the arrangement of the metalens array unit, and each of the first sensor units contains a focal reference point, the first sensor is used to detect the deviation between the actual focal point of each transmittive metalens and the focal reference point, the focal reference point is the theoretical focal point of the transmittive metalens on the corresponding sensor unit,
• wherein at least one reflective metalens is used for reflecting the incident light to the second sensor and the second sensor is used for imaging of reflected lights of the reflective metalens.