Image acquiring device

An image acquiring device, comprising:

• a liquid lens having a refractive index varied by pressurization;
• a membrane provided to one surface of the liquid lens so as to form a pressurization surface;
• a pressurizing member provided to an outside of the membrane;
• a support wire provided across a prescribed region of an outer surface of the pressurizing member, the support wire moving the pressurizing member toward the membrane by contracting by conduction, the support wire moving the pressurizing member toward an opposite side of the membrane by expanding;
• and
• a lens controller controlling the support wire to contract or expand in a manner of applying a current to the support wire or interrupting the current,
• wherein the lens controller applies the current to the support wire in response to a first external signal for decreasing a focal distance.