Camera module including liquid lens, optical device including the same, and method of manufacturing camera module including liquid lens

A camera module, comprising:

• a holder comprising a side wall having a hole;
• a first lens unit comprising a plurality of lenses and disposed in the holder;
• and
• a focus adjustable lens disposed on the first lens unit,
• wherein the focus adjustable lens overlaps the first lens unit in a first direction parallel to an optical axis direction, and
• wherein the focus adjustable lens is inserted through the hole and overlapped with the hole in a second direction perpendicular to the optical axis direction.

A camera module, comprising:

• a holder comprising a side wall having a hole;
• a first lens disposed in the holder;
• a second lens disposed in the holder;
• and
• an interface variable lens disposed between the first lens and the second lens,
• wherein the interface variable lens comprises a first material, a second material on the first material, and an interface between the first material and the second material,
• wherein a part of the interface variable lens is disposed in the hole,
• wherein a size of the hole is greater than a thickness of a center of the interface variable lens, in a direction parallel to an optical axis, and
• wherein the size of the hole is less than a combined thickness, along the optical axis, of the interface variable lens and the first lens.