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Confocal axial beam scanning through LC-SLM

  • Limin Zou*
  • , Jin Dong
  • , Zhigang Fang
  • *Corresponding author for this work
  • Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The axial beam scanning in confocal microscopy has been implemented using liquid crystal spatial light modulator (LC-SLM). A zoom illuminating lens is realized by introducing LC-SLM into the confocal illumination light path, and thus it shifts the focus of the objective lens axially. The axial optical sectioning in a conventional confocal microscope is hereby achieved by beam scanning rather than mechanically moving the objective lens. The axial focus shift of the objective lens is realized by changing the modulation phase bitmaps of LC-SLM. By electrically controlling LC-SLM, it has been demonstrated that the focus can shift in the axial direction continuously over a 100μm range, while the FWHM of the focal spot keeps the same as that without LC-SLM. Experimental results further show that the axial intensity curves shift axially in confocal microscopy and confocal axial beam scanning replacing mechanical scanning can therefore be implemented.

Original languageEnglish
Title of host publicationSixth International Symposium on Precision Engineering Measurements and Instrumentation
DOIs
StatePublished - 2010
Event6th International Symposium on Precision Engineering Measurements and Instrumentation - Hangzhou, China
Duration: 8 Aug 201011 Aug 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7544
ISSN (Print)0277-786X

Conference

Conference6th International Symposium on Precision Engineering Measurements and Instrumentation
Country/TerritoryChina
CityHangzhou
Period8/08/1011/08/10

Keywords

  • Axial beam scanning
  • Confocal microscopy
  • LC-SLM

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