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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 17 — Aug. 22, 2005
  • pp: 6407–6415

Quasi-telecentric optical design of a microscope-compatible OCT scanner

Zhilin Hu and Andrew M. Rollins  »View Author Affiliations

Optics Express, Vol. 13, Issue 17, pp. 6407-6415 (2005)

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We report an optical coherence tomography (OCT) scanner design with optimized quasi-telecentric optics. This scanner achieves a uniform, Gaussian spot size of 15μm (1/e2 diameter) over a range of 4.4mm in two orthogonal transverse scan dimensions. Model simulation using optical design software agrees with measurements by beam analyzer. We provide a reasonable design criterion of 0.05 (the ratio of the half separation of two orthogonal scanning mirrors to the front focal length of the optics that follow) for the quasi-telecentric scanner which corresponds to a spot-size and spot ellipticity variation of only 4% over the transverse scan range. Furthermore, this OCT scanner accommodates a microscope to precisely guide and document OCT imaging of small samples. OCT images of in-vivo human skin, human nail fold, and embryonic hearts (avian stage 22 and stage 28) demonstrate the image quality achieved with the scanner. The results indicate that optimizing the sample scanner optical design is important for optimizing OCT image quality.

© 2005 Optical Society of America

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(120.3890) Instrumentation, measurement, and metrology : Medical optics instrumentation
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(220.4830) Optical design and fabrication : Systems design

ToC Category:
Research Papers

Original Manuscript: June 23, 2005
Revised Manuscript: August 4, 2005
Published: August 22, 2005

Zhilin Hu and Andrew Rollins, "Quasi-telecentric optical design of a microscope-compatible OCT scanner," Opt. Express 13, 6407-6415 (2005)

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