Dual camera module, optical device, camera module, and method for operating camera module

A dual camera module comprising:

• a first camera module comprising a first liquid lens and capturing a first image;
• and
• a second camera module comprising a second liquid lens and capturing a second image,
• wherein a viewing angle of the first camera module is smaller than a viewing angle of the second camera module, the viewing angle of the second camera module comprises at least a part of the viewing angle of the first camera module such that there is an overlapping area between the first image and the second image so as to enable a composite image formed by combining the first image and the second image,
• wherein the first liquid lens comprises a first liquid, a second liquid different from the first liquid, and a first interface formed between the first liquid and the second liquid, the second liquid lens comprises a third liquid, a fourth liquid different from the third liquid, and a second interface formed between the third liquid and the fourth liquid;
• wherein the first camera module is focused by varying the first interface of the first liquid lens, and the second camera module is focused by varying the second interface of the second liquid lens;
• wherein the first interface of the first liquid lens is formed with a first curvature when a subject is disposed at a position spaced apart from the first camera module by a first distance, and the second interface of the second liquid lens is formed with a second curvature when the subject is disposed at a position spaced apart from the second camera module by the first distance;
• and
• wherein the first curvature of the first interface is different from the second curvature of the second interface.