Dual-wavelength off-axis digital holography using a single light-emitting diode

C. H.O. Janghyun, L. I.M. Jinsang, Sungbin Jeon, Guk Jong Choi, Hyungbae Moon, No Cheol Park, Young Pil Park

Research output: Contribution to journalArticle

8 Citations (Scopus)


We propose a new low-coherence interferometry system for dual-wavelength off-axis digital holography. By utilizing diffraction gratings, two beams with narrower bandwidths and different center wavelengths could be filtered in a single light-emitting diode. The characteristics of the system are analytically determined to extend the coherence length and field-of-view enough for off-axis configuration. The proposed system enables the fast and accurate measurement of the surface profile with more than a micrometer step height and less noise. The performance of the system is verified by the experimental results of a standard height sample.

Original languageEnglish
Pages (from-to)2123-2131
Number of pages9
JournalOptics Express
Issue number2
Publication statusPublished - 2018 Jan 22


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Janghyun, C. H. O., Jinsang, L. I. M., Jeon, S., Choi, G. J., Moon, H., Park, N. C., & Park, Y. P. (2018). Dual-wavelength off-axis digital holography using a single light-emitting diode. Optics Express, 26(2), 2123-2131. https://doi.org/10.1364/OE.26.002123