Confocal microscopy with a volume holographic filter

George Barbastathis, Michal Balberg, David J. Brady

Research output: Contribution to journalArticlepeer-review

112 Scopus citations


A confocal scanning microscopy in which a matched volume holographic filter replaces the pinhole is described. Hologram recording is such that the field generated by an in-focus object is maximally diffracted, whereas out-of-focus objects are filtered out due to Bragg mismatch. This decouples dynamic range and axial resolution. The dynamic range is determined by the diffraction efficiency of the hologram, and the axial resolution by the numerical aperture of the objective lens and the hologram thickness. Additional benefits include ease of alignment and improved aberration performance.

Original languageEnglish (US)
Pages (from-to)811-813
Number of pages3
JournalOptics letters
Issue number12
StatePublished - Jun 15 1999
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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