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It is very important for laser auto-focusing systems in the applications of precise machining. The reflective laser area which is a semi-circular pattern is usually used to estimate the degree of defocusing. As work piece surface may be different in reflective properties and not always smooth, the reflective pattern is usually not a perfect semi-circle. In this study, a novel image processing algorithm...
In keeping with consumer preferences for ever more high-performance products, a requirement exists for precise autofocusing microscope systems for the inspection processes in mass production lines. Accordingly, a precise autofocusing microscope is proposed based on the reduction of the geometrical fluctuations of a laser light source, in which, the geometrical fluctuations of the laser light source...
In keeping with consumer preferences for ever more high-performance products, a requirement exists for precise and fast auto-focusing microscope systems for the inspection processes in mass production lines. Accordingly, the present study proposes a precise and fast laser-based auto-focusing microscope system in which an auto-focusing capability is achieved by using a position feedback signal from...
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