Patent ID: 7330648

Claim:
An optical module comprising: a circuit board that includes an imaging element; a lens barrel that is fixed onto the circuit board to movably accommodate a lens system that forms an image on an imaging surface of the imaging element in a light axis direction; a cylindrical cam; a drive section in which an actuator drives the cylindrical cam via a gear train; and a cover that integrally covers the lens barrel and the actuator and determines the positional relationship between the lens barrel and the drive section; wherein the lens system comprises a first lens holder comprising a guide bar and having a first lens therein, and a second lens holder comprising a receiving groove and having a second lens therein; and wherein the guide bar is engaged with the receiving groove; and wherein the lens barrel comprises a guide groove; and wherein one of the first lens holder and the second lens holder comprises a guide bar that is engaged with the guide groove; and wherein the cylindrical cam has a cam surface engaged with a protrusion disposed in the outside of the lens barrel and extending from a side face of the first or second lens holder to move the lens holder.