Confocal operation in differential phase interference microscopy

Michael Geoffrey Somekh, R. D. Holmes, Roland K. Appel, Chung Wah See

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


This paper discusses the operation and imaging properties of various types of optical heterodyne interferometer. Conditions needed to achieve confocality in differential interference microscopes are considered. This leads to a novel extended focus phase imaging mode. Results are presented which demonstrate this mode of operation and show the ability of the technique to produce accurate phase measurement on samples with warp and tilt, over a range much greater than the depth of focus of the objective lens.
Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Number of pages11
ISBN (Print)081941350X
Publication statusPublished - 1 Dec 1994
Externally publishedYes
EventMicroscopy, Holography, and Interferometry in Biomedicine - Budapest, Hungary
Duration: 1 Sep 19933 Sep 1993


ConferenceMicroscopy, Holography, and Interferometry in Biomedicine

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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