Auto-focus corrects for variation in the distance to the object as well as variations in the lens with temperature. As the object distance changes or the temperature of the optics changes, the image can become blurry and lose its sharpness. Auto-focus recovers the sharpness by adjusting the position of the lenses.
 
DigitalOptics Corporation™ (DOC) OptiML auto-focus (AF) actuator uses MEMS technology to precisely position and move a lens inside the camera optics to focus. The AF actuator is based on actuators that utilize electrostatic forces to move a lens with optimal positioning precision and repeatability. The mechanical interface to the AF actuator allows precise alignment of the lens barrel to the moving lens. The electrical interface is simply two pins that are appropriately sized to enable contact using a variety of methods.
 
The MEMS actuator technology can be used in smart phones, digital still cameras and other electronic size constrained devices.
 

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