Compact Assembly Machine for Cellular Phone Lens Module Using Self-Adjustment

Efficient alignment method using self-adjustment and lens aberration reduction method using several lenses with different orientation for cellular phone lens assembly are introduced to compensate for alignment error among lens parts and minimize lens aberration caused by lens defect in this work, respectively. Self-adjustment module has 2 degrees of freedom of translation motion and 3 degrees of freedom of rotation by porous air bearing and spring to compensate for alignment error automatically. The allowable alignment error and proper inserting force to assembly lens parts successfully was investigated and evaluated compared to conventional lens assembly machine and also optimum orientation of each lens to minimize lens aberration is examined through experiment. Self-adjustment module guarantees accurate arrangement of lens parts during assembly process in spite of alignment error so that remarkable price reduction and miniaturization of assembly machine could be achieved.