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http://dx.doi.org/10.3807/JOSK.2011.15.4.352

Dual-wavelength Digital Holography Microscope for BGA Measurement Using Partial Coherence Sources  

Cho, Hyung-Jun (Department of Physics, Cheju National University)
Kim, Doo-Cheol (Department of Physics, Cheju National University)
Yu, Young-Hun (Department of Physics, Cheju National University)
Jung, Won-Ki (School of Electrical Engineering, Jeonju University)
Shin, Sang-Hoon (AP & Tec)
Publication Information
Journal of the Optical Society of Korea / v.15, no.4, 2011 , pp. 352-356 More about this Journal
Abstract
Dual-wavelength holography has a better axial range than single-wavelength holography, allowing unambiguous phase imaging. Partial coherence sources reduce coherent noise, resulting in improved reconstructed images. We measured a ball-grid array using dual-wavelength holography with partial coherence sources. This holography method is useful for measurement samples that exhibit coherence noise and have a step height larger than the single wavelength used in holography.
Keywords
Digital holography; Dual-wavelength holography; Error reduction;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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