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An Automatic Focusing Method Using Establishment of Step Size from Optical Axis Interval  

Kim, Gyung Bum (Aeronautical & Mechanical Design Engineering, Korea National University of Transportation)
Moon, Soon Hwan (Dept. New Renewable Energy, Chungbuk Health & Science University)
Publication Information
Journal of the Semiconductor & Display Technology / v.14, no.1, 2015 , pp. 7-11 More about this Journal
Abstract
In this paper, an automatic focusing method has been proposed for speedy and reliable measurement and inspection in industry. It is very difficult to determine focusing step size and moving direction in one camera autofocusing. The proposed method can improve speed and accuracy of focusing by using the optical axis interval of two cameras, which is automatically set up as focusing step size. Also, it can determine moving direction from focus value comparisons of two cameras, and then solve ambiguity of one camera focusing. Its performance is verified by experiments. It is expected that it can apply to optical system for measurement and inspection in industry fields.
Keywords
Automatic focusing; Focus measure; Focusing step size; Optical axis interval;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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