Patent ID: 8019212

Claim:
An optical module for a photographing apparatus, the optical module comprising: a fixed lens group member arranged along a first optical axis direction that faces an object to be photographed; a reflection member arranged in the rear of the fixed lens group member and outputting an image light of the object to be photographed in a second optical axis direction perpendicular to the first optical axis direction by reflecting incident image light; a first lens group member comprising a first lens group arranged along the second optical axis direction and a first edge unit supporting the first lens group and comprising a first guide protrusion; a second lens group member comprising a second lens group arranged separated from the first lens group along the second optical axis direction and a second edge unit supporting the second lens group and comprising a second guide protrusion; a zoom motor for providing power to change a distance between the first and second lens group members and thus perform a zoom operation on the image light input to an imaging device for photographing; a plane cam member comprising a gear unit formed in a part of an edge of the plane cam member to receive the power from the zoom motor, a first cam slot in which the first guide protrusion is inserted to slide therein so as to move the first lens group member, and a second cam slot in which the second guide protrusion is inserted to slide therein so as to move the second lens group member, wherein at least one of the first cam slot and the second cam slot of the plane cam member moves in a plane transverse to a tooth of the gear unit; and a frame where the plane cam member is installed.