PROJECT TITLE :
Controlling a MEMS Deformable Mirror in a Miniature Auto-Focusing Imaging System
Typical auto-focusing camera modules modify their optical focus by moving lenses. Although motors, like stepping motors or voice coil motors, will modification the lens position with nice precision and so vary the image sharpness, massive volume and excess power consumption remain essential issues for mobile device applications. This paper discusses an auto-focusing camera module that adopts a microelectromechanical system (MEMS) deformable mirror (DM) with variable focusing capability to interchange mechanical motors. The DM utilized in this paper can give twenty diopters of focusing capability, which is one order of magnitude above silicon-primarily based DMs, therefore the autofocus module can be compact enough for mobile devices. As a result of of the characteristics of MEMS DMs, we proposed a “proportion-drop” looking out algorithm to find a pointy image based on a focus value calculation. The typical auto-focusing time is 45p.c faster than the worldwide searching technique.
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