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.
© 2011 Optical Society of Korea
Original Manuscript: July 11, 2011
Revised Manuscript: September 27, 2011
Manuscript Accepted: September 27, 2011
Published: December 25, 2011
Hyung-Jun Cho, Doo-Cheol Kim, Young-Hun Yu, Won-Ki Jung, and Sang-Hoon Shin, "Dual-wavelength Digital Holography Microscope for BGA Measurement Using Partial Coherence Sources," J. Opt. Soc. Korea 15, 352-356 (2011)
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