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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 10 — Oct. 2, 2009

Spectrally-encoded color imaging

DongKyun Kang, Dvir Yelin, Brett E. Bouma, and Guillermo J. Tearney  »View Author Affiliations

Optics Express, Vol. 17, Issue 17, pp. 15239-15247 (2009)

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Spectrally-encoded endoscopy (SEE) is a technique for ultraminiature endoscopy that encodes each spatial location on the sample with a different wavelength. One limitation of previous incarnations of SEE is that it inherently creates monochromatic images, since the spectral bandwidth is expended in the spatial encoding process. Here we present a spectrally-encoded imaging system that has color imaging capability. The new imaging system utilizes three distinct red, green, and blue spectral bands that are configured to illuminate the grating at different incident angles. By careful selection of the incident angles, the three spectral bands can be made to overlap on the sample. To demonstrate the method, a bench-top system was built, comprising a 2400-lpmm grating illuminated by three 525-µm-diameter beams with three different spectral bands. Each spectral band had a bandwidth of 75 nm, producing 189 resolvable points. A resolution target, color phantoms, and excised swine small intestine were imaged to validate the system’s performance. The color SEE system showed qualitatively and quantitatively similar color imaging performance to that of a conventional digital camera.

© 2009 OSA

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(170.3880) Medical optics and biotechnology : Medical and biological imaging

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: June 15, 2009
Revised Manuscript: August 5, 2009
Manuscript Accepted: August 8, 2009
Published: August 13, 2009

Virtual Issues
Vol. 4, Iss. 10 Virtual Journal for Biomedical Optics

DongKyun Kang, Dvir Yelin, Brett E. Bouma, and Guillermo J. Tearney, "Spectrally-encoded color imaging," Opt. Express 17, 15239-15247 (2009)

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