A lens actuator includes a carrier having a tubular shape having a through-hole provided therein. The through-hole is arranged to mount a lens therein. The lens actuator further includes plural springs contacting upper and lower surfaces of the carrier, a coil fixed to the carrier, a first yoke, a second yoke, and a magnet contacting the first yoke and the second yoke. The coil is placed between the first yoke and the second yoke. This lens actuator moves the lens by a long distance, and has a small size.
1. A lens actuator comprising:
a carrier having a tubular shape having a through-hole provided therein, the through-hole being arranged to mount a lens therein;
a plurality of springs contacting both ends of the carrier, respectively;
a coil fixed to the carrier;
a first yoke having a first surface facing the coil;
a second yoke having a second surface facing the coil, the coil being placed between the first surface of the first yoke and the second surface of the second yoke; and
a magnet contacting the first surface of the first yoke and the second surface of the second yoke.
2. The lens actuator of claim 1 , wherein a height of the first yoke is equal to a height of the second yoke.