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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 25, Iss. 23 — Dec. 1, 2000
  • pp: 1711–1713

Effect of an annular pupil filter on differential confocal microscopy

Li Liu, Xiaoqiang Deng, Lisong Yang, Guiying Wang, and Zhizhan Xu  »View Author Affiliations


Optics Letters, Vol. 25, Issue 23, pp. 1711-1713 (2000)
http://dx.doi.org/10.1364/OL.25.001711


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Abstract

Combining differential confocal microscopy and an annular pupil filter, we obtained the normalized axial intensity distribution curve of an optical system. We used the sharp slopes of the axial response curve of the optical system to measure the surface profile of a reflection grating. Experimental results prove that this method can extend the axial dynamic range and improve the transverse resolution of three-dimensional profilometry by sacrificing axial resolution.

© 2000 Optical Society of America

OCIS Codes
(100.5090) Image processing : Phase-only filters
(100.6640) Image processing : Superresolution
(180.1790) Microscopy : Confocal microscopy

Citation
Li Liu, Xiaoqiang Deng, Lisong Yang, Guiying Wang, and Zhizhan Xu, "Effect of an annular pupil filter on differential confocal microscopy," Opt. Lett. 25, 1711-1713 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-23-1711

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