Optoelectronics

Industry’s first bi-direction type actuator for 13MP cameras

18th January 2016
Nat Bowers

Featuring low power consumption and a low profile, ALPS has announced the ATMC1Z9 series bi-direction type autofocus actuator for integration into 13MP smartphone camera modules. Claimed to be the industry's first bi-direction type actuator for 13MP, the device consumes around one third of the power used by existing preload type actuators and enables high-speed focusing.

Bi-direction type actuators set the initial position of the lens at a frequently used focal distance (position) and adjust focus by moving the lens from that point in one direction or the other (bi-directionally) depending on whether the current is positive or negative. This shortens the distance the lens has to travel, thereby reducing the amount of power required to move the lens and enabling high-speed focusing.

To be able to stop and start movement of a suspended lens while still managing to restrict lens tilt requires a high degree of precision in flat spring assembly. ALPS achieves this using mould design, simulation and automated machine design technologies. Lens tilt is less than one tenth of a degree during lens drive.

Measuring 8.5x8.5x2.8mm, the actuator has one of the slimmest profiles in the industry, contributing to greater flexibility and quality in casing design.

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