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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 25 — Dec. 8, 2008
  • pp: 20477–20483

Optical resolution below λ/4 using synthetic aperture microscopy and evanescent-wave illumination

Alexander Neumann, Yuliya Kuznetsova, and S. R. J. Brueck  »View Author Affiliations

Optics Express, Vol. 16, Issue 25, pp. 20477-20483 (2008)

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Evanescent-wave illumination is applied to synthetic-aperture microscopy on a transparent solid substrate to extend the resolution limit to λ/2(n+1) (where n is the substrate refractive index) independent of the lens NA. Using a 633 nm source and a 0.4 NA lens, a resolution to 150 nm (λ/4.2) is demonstrated on a glass (n=1.5) substrate. Further extension to ~74-nm resolution (λ/8.6) is projected with a higher index substrate (n=3.3).

© 2008 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(110.3175) Imaging systems : Interferometric imaging

ToC Category:
Imaging Systems

Original Manuscript: September 29, 2008
Revised Manuscript: November 11, 2008
Manuscript Accepted: November 14, 2008
Published: November 25, 2008

Virtual Issues
Vol. 4, Iss. 2 Virtual Journal for Biomedical Optics

Alexander Neumann, Yuliya Kuznetsova, and S. R. J. Brueck, "Optical resolution below λ/4 using synthetic aperture microscopy and evanescent-wave illumination," Opt. Express 16, 20477-20483 (2008)

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