Single-beam spectrally encoded color imaging

Optics Letters
Mitsuhiro IkutaG Tearney

Abstract

We have developed, to the best of our knowledge, a new method of conducting spectrally encoded color imaging using a single light beam. In our method, a single broadband light beam was incident on a diffraction grating, where the overlapped third order of the red, fourth order of the green, and fifth order of the blue spectral bands were focused on a line illuminating tissue. This configuration enabled each point on the line to be illuminated by three distinctive wavelengths, corresponding to red, green, and blue. A custom grating was designed and fabricated to achieve high diffraction efficiencies for the wavelengths and diffraction orders used for color spectrally encoded imaging. A bench system was built to test the new spectrally encoded color imaging method. For a beam diameter of 174 μm, the bench system achieved 89,000 effective pixels over a 70° circular field. Spectrally encoded color images of excised swine tissue revealed blood vessels with a similar color appearance to those obtained via a conventional color camera. The results suggest that this single-beam spectrally encoded color method is feasible and can potentially simplify color spectrally encoded endoscopy probe designs.

References

Oct 20, 2006·Nature·D YelinG J Tearney
Nov 17, 2007·Optics Letters·G J TearneyB E Bouma
Aug 19, 2009·Optics Express·DongKyun KangGuillermo J Tearney
Mar 19, 2013·Lab on a Chip·Dongkyun KangGuillermo J Tearney
Aug 1, 2014·Optics Letters·Gyeong Woo CheonJin U Kang
Mar 16, 2016·Biomedical Optics Express·Adel Zeidan, Dvir Yelin

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Citations

May 28, 2019·Lasers in Surgery and Medicine·Adel ZeidanGuillermo J Tearney
Mar 9, 2021·Biomedical Optics Express·Mitsuhiro IkutaSeiji Takeuchi

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