Image sensor

An image sensor comprising:

• a plurality of unit pixels, each of the unit pixels including a first sub-pixel and a second sub-pixel adjacent to the first sub-pixel in a plan view of the image sensor, an area size of a second sub-pixel being smaller than an area size of the first sub-pixel in the plan view;
• and
• a lens array including a first sub-lens area on the first sub-pixel of each unit pixel and a second sub-lens area on the second sub-pixel of each unit pixel,
• the first sub-lens area including a first micro lens, and the second sub-lens area including a second micro lens, and
• a first width of a first cross section of the first micro lens cut along a direction toward the second sub-pixel being smaller than a second width of a second cross section of the first micro lens cut along a direction toward another first micro lens adjacent thereto.

An image sensor comprising:

• a plurality of unit pixels, each of the unit pixels including a first sub-pixel and a second sub-pixel adjacent to the first sub-pixel in a plan view of the image sensor, an area size of a second sub-pixel being smaller than an area size of the first sub-pixel in the plan view;
• and
• a lens array including a first sub-lens area on the first sub-pixel of each unit pixel and a second sub-lens area on the second sub-pixel of each unit pixel,
• the first sub-lens area including a plurality of first micro lenses, and the second sub-lens area including a second micro lens, and
• a number of the second micro lenses included in the second sub-lens area being smaller than a number of the plurality of first micro lenses included in the first sub-lens area.