Image sensor and electronic apparatus including the image sensor

An image sensor comprising:

• a sensor substrate comprising a plurality of pixels configured to detect light;
• and
• a nano-optical microlens array arranged on the sensor substrate, wherein the nano-optical microlens array comprises a plurality of nano-optical microlenses arranged to focus incident light on the plurality of pixels,
• wherein the plurality of nano-optical microlenses comprises a plurality of lens groups,
• wherein each lens group of the plurality of lens groups comprises a first nano-optical microlens, a second nano-optical microlens, a third nano-optical microlens, and a fourth nano-optical microlens each arranged in a 2×2 shape in a first direction and a second direction,
• wherein each of the first, the second, the third, and the fourth nano-optical microlenses of each lens group of the plurality of lens groups comprises a plurality of nanostructures arranged to focus incident light on a corresponding pixel among the plurality of pixels,
• wherein the plurality of lens groups are classified into a center group at a center of the nano-optical microlens array and a plurality of peripheral groups spaced apart from the center of the nano-optical microlens array,
• wherein each lens group of the plurality of lens groups comprises a plurality of intervals formed between border nanostructures from among the plurality of nanostructures of the respective lens group, wherein the border nanostructures comprise nanostructures of the respective lens group that are directly facing each other and are separated by a boundary between adjacent nano-optical microlenses from among the first, the second, the third, and the fourth nano-optical microlenses of the respective lens group,
• wherein, for each lens group of the plurality of lens groups, at least one interval of the plurality of intervals of the center group is different from at least one interval of the plurality of intervals of a peripheral group of the plurality of peripheral groups, and
• wherein a difference between the at least one interval of the plurality of intervals of the center group and the at least one interval of the plurality of intervals of a peripheral group of the plurality of peripheral groups increase as a chief ray angle of the peripheral group increases.

An image sensor comprising:

• a sensor substrate comprising a plurality of pixels configured to detect light;
• and
• a nano-optical microlens array arranged on the sensor substrate, wherein the nano-optical microlens array comprises a plurality of nano-optical microlenses arranged to focus incident light on the plurality of pixels,
• wherein the plurality of nano-optical microlenses comprises:
• a central group of nano-optical microlenses, wherein the central group is positioned at a center of the nano-optical microlens array;
• and
• a peripheral group of nano-optical microlenses, wherein the peripheral group is spaced apart from the center of the nano-optical microlens array,
• wherein each of the central group and the peripheral group respectively comprise a first nano-optical microlens, a second nano-optical microlens, a third nano-optical microlens, and a fourth nano-optical microlens each arranged in a 2×2 array,
• wherein a center of each of the first, the second, the third, and the fourth nano-optical microlenses of the peripheral group is offset with respect to a center of a pixel from among the plurality of pixels corresponding to the peripheral group,
• wherein an offset distance of at least two of the first, the second, the third, and the fourth nano-optical microlenses of the peripheral group are different from each other,
• wherein, among the first, the second, the third, and the fourth nano-optical microlenses of the peripheral group, an offset distance of the nano-optical microlens corresponding to a pixel among the plurality of pixels for sensing light in a first wavelength band is greater than an offset distance corresponding to a pixel among the plurality of pixels for sensing light in a second wavelength band, and
• wherein the first wavelength band of light is the longest wavelength band of light detected by a pixel among the plurality of pixels corresponding to a nano-optical microlens of the peripheral group, and the second wavelength band of light is the shortest wavelength band of light detected by a pixel among the plurality of pixels corresponding to a nano-optical microlens of the peripheral group.