Image sensor including color separating lens array and electronic apparatus including the image sensor

An image sensor comprising:

• a sensor substrate comprising a plurality of first photosensitive cells and a plurality of second photosensitive cells alternately arranged along a first row and a plurality of third photosensitive cells and a plurality of fourth photosensitive cells alternately arranged along a second row adjacent to the first row;
• and
• a color separating lens array comprising a plurality of first regions each facing the plurality of first photosensitive cells and comprising a plurality of first nanoposts, a plurality of second regions each facing the plurality of second photosensitive cells and comprising a plurality of second nanoposts, a plurality of third regions each facing the plurality of third photosensitive cells and comprising a plurality of third nanoposts, and a plurality of fourth regions each facing the plurality of fourth photosensitive cells and comprising a plurality of fourth nanoposts,
• wherein, in the first region, a first size of at least one of the plurality of first nanoposts or a first shape of the at least one of the plurality of first nanoposts are configured to:
• condense light having a first wavelength onto the first photosensitive cell located directly below the first region, branch light having a second wavelength onto the second photosensitive cell adjacent to the first photosensitive cell in a horizontal direction, and branch light having a third wavelength onto the third photosensitive cell adjacent to the first photosensitive cell in a vertical direction, and
• wherein, in the second region, a second size of at least one of the plurality of second nanoposts or a second shape of the at least one of the plurality of second nanoposts are configured to:
• condense light having the second wavelength onto the second photosensitive cell located directly below the second region, branch light having the first wavelength onto the first photosensitive cell adjacent to the second photosensitive cell in the horizontal direction and onto the fourth photosensitive cell adjacent to the second photosensitive cell in a vertical direction, and branch light having a third wavelength onto the third photosensitive cell adjacent to the second photosensitive cell in a diagonal direction.