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http://dx.doi.org/10.5302/J.ICROS.2006.12.2.168

An Auto-Focusing Method for CCM Test Handlers  

Yoon Ree-Sang (충북대학교 제어계측공학과)
Park Tae-Ryoung (충북대학교 제어계측공학과)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.12, no.2, 2006 , pp. 168-173 More about this Journal
Abstract
This paper proposes an auto-focusing method for production of compact camera module (CCM). The CCM test handlers are mainly used in the final CCM production stage to test and adjust the lens focus of CCMs. To improve the productivity of CCM test handlers, we propose the auto-focusing method adjusting the lens focus efficiently. The max-min-difference (MMD) method is newly developed to compute the focus value efficiently, and two-stage searching method is also developed to find the best focus position quickly. Experimental results are presented to verify the usefulness of proposed method.
Keywords
CCM (Compact Camera Module); test handlers; auto focusing; two-stage search;
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Times Cited By KSCI : 1  (Citation Analysis)
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