Resolution enhancement of spectrum normalization in synthetic aperture digital holographic microscopy

Xin Ji Lai, Han Yen Tu, Chung Hsin Wu, Yu Chih Lin, Chau Jern Cheng

Research output: Contribution to journalArticle

22 Citations (Scopus)


This study describes the overlapping of spatial frequency bands for synthetic aperture in digital holography using spectrum normalization to effectively enhance the spatial resolutions of image reconstruction. Synthesized spectrum swelling induced by excessive frequency overlaps can be normalized through the inverse apodization of an adjustable window function, which is similar to the effects of suppressing low-frequency expansion and strengthening high-frequency components of the reconstructed images. The results indicated that using the normalized spectrum synthesis that requires only a few frequency bands effectively enhances the spatial resolution and phase sensitivity of reconstructed images in digital holographic microscopy.

Original languageEnglish
Pages (from-to)A51-A58
JournalApplied Optics
Issue number1
Publication statusPublished - 2015 Jan 1


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

Cite this