Three-dimensional focus manipulation by means of a birefringent plate

Miklós Erdélyi, Miklós Bereznai, Gábor Gajdátsy, Zsolt Bor

Research output: Contribution to journalArticle

3 Citations (Scopus)


A method based on double imaging is proposed for three-dimensional focus manipulation. A thin birefringent plate placed behind a focusing lens was applied to generate two foci with a separation smaller than the original DOF. Depth of focus enlargement of 227% was achieved without serious degradation in lateral resolution. Experimental results obtained by using a confocal arrangement were in good agreement with theory. Both theoretical considerations and experimental results showed that in non-paraxial case the ordinary and extraordinary foci could not be excited independently.

Original languageEnglish
Pages (from-to)4807-4811
Number of pages5
JournalOptics Communications
Issue number19
Publication statusPublished - Oct 1 2008


  • Birefringence
  • Confocal microscopy
  • Multiple imaging

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Three-dimensional focus manipulation by means of a birefringent plate'. Together they form a unique fingerprint.

  • Cite this