Samsung patents image sensor using nanoposts to split light colors

1. An image sensor comprising: a sensor substrate comprising first pixels, second pixels, third pixels, and fourth pixels; and a color separating lens array comprising first pixel corresponding regions respectively corresponding to the first pixels, second pixel corresponding regions respectively corresponding to the second pixels, third pixel corresponding regions respectively corresponding to the third pixels, and fourth pixel corresponding regions respectively corresponding to the fourth pixels, wherein the first pixel corresponding regions, the second pixel corresponding regions, the third pixel corresponding regions and the fourth pixel corresponding regions are configured to condense light of a first wavelength, in incident light incident on the color separating lens array, onto the first pixels and fourth pixels, condense light of a second wavelength different from the first wavelength in the incident light onto second pixels, and condense light of a third wavelength different from the first wavelength and the second wavelength in the incident light onto the third pixels, wherein each of the first pixel corresponding regions and each of the fourth pixel corresponding regions comprise nanoposts, wherein the nanoposts included in each of the first pixel corresponding regions comprise a first nanopost and a second nanopost provided at different positions in each of the first pixel corresponding regions, wherein widths of the first nanoposts of the first pixel corresponding regions in an area having an azimuth angle of 0 degree or 180 degrees change from a center portion of the color separating lens array to a periphery portion of the color separating lens array, and wherein widths of the first nanoposts of the first pixel corresponding regions in an area having an azimuth angle of 90 degrees or 270 degrees are constant from the center portion of the color separating lens array to the periphery portion of the color separating lens array.