Super-achromatic rapid scanning microendoscope for ultrahigh-resolution OCT imaging

Danling Wang, Boyd V. Hunter, Michael J. Cobb, Xingde Li

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Microendoscope is a critical technology to enable high-resolution imaging of internal luminal organs with optical coherence tomography. This paper reports the development of an achromatic compound microlens and a rapid scanning microendoscope based on the microlens that offers an ultrahigh transverse resolution of 4 $\mu$m (and an axial resolution of 2.2 $\mu$m when using a low-coherence light source with a broad spectrum bandwidth of 150 nm). The rapid scanning endoscope is capable of ultrahigh-resolution (UHR) optical coherence tomography (OCT) imaging in real time at an imaging speed of about 1220 lateral scans/s, with the image quality comparable to a slow bench-top UHR-OCT system ($\sim$100 scans/s). The superior performance of a scanning endoscope made of a compound microlens over an endoscope made of a conventional GRIN (gradient index) lens in imaging biological tissues has also been demonstrated.

Original languageEnglish (US)
Pages (from-to)1596-1601
Number of pages6
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number6
StatePublished - Nov 2007
Externally publishedYes


  • Biomedical optical imaging
  • Endoscope
  • Optical coherence tomography (OCT)
  • Ultrahigh resolution (UHR) imaging

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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