Optics: measuring and testing – By light interference – Using fiber or waveguide interferometer
Reexamination Certificate
2006-01-13
2008-03-25
Lyons, Michael A. (Department: 2877)
Optics: measuring and testing
By light interference
Using fiber or waveguide interferometer
Reexamination Certificate
active
07349098
ABSTRACT:
Method and apparatus for achieving dynamic focus tracking during real-time optical coherence tomography (OCT) by simultaneously implementing geometric focus tracking (GFT) and coherence gate tracking (CGT). GFT tracking involves changing a position of the focal point of the OCT probe in the sample during scanning. Preferably, the focal point is moved relative to the sample without disrupting the Gaussian beam profile of the scanner. CGT involves determining a change in the optical path length of the sample arm due to the GFT, and calculating the change in the optical path length in the reference arm required to maintain an equivalent optical path length in both the sample arm and the reference arm. The reference arm is then translated by the required amount, to maximize the OCT signal. A lateral priority scanning technique is employed, and this technique can be implemented using a single optical fiber suitable for endoscopic use.
REFERENCES:
patent: 4410235 (1983-10-01), Klement et al.
patent: 4768513 (1988-09-01), Suzuki
patent: 5074642 (1991-12-01), Hicks
patent: 5172685 (1992-12-01), Nudelman
patent: 5247174 (1993-09-01), Berman
patent: 5272330 (1993-12-01), Betzig et al.
patent: 5394500 (1995-02-01), Marchman
patent: 5425123 (1995-06-01), Hicks
patent: 5480046 (1996-01-01), Filas et al.
patent: 5570441 (1996-10-01), Filas et al.
patent: 5703979 (1997-12-01), Filas et al.
patent: 5715337 (1998-02-01), Spitzer et al.
patent: 5727098 (1998-03-01), Jacobson
patent: 6046720 (2000-04-01), Melville et al.
patent: 6091067 (2000-07-01), Drobot et al.
patent: 6161035 (2000-12-01), Furusawa
patent: 6211904 (2001-04-01), Adair et al.
patent: 6294775 (2001-09-01), Seibel et al.
patent: 6327493 (2001-12-01), Ozawa et al.
patent: 6485413 (2002-11-01), Boppart et al.
patent: 7023558 (2006-04-01), Fee et al.
patent: 2001/0055462 (2001-12-01), Seibel
patent: 2002/0064341 (2002-05-01), Fauver et al.
patent: 2004/0181148 (2004-09-01), Uchiyama et al.
patent: 1142529 (2001-10-01), None
patent: 2001174744 (2001-06-01), None
Bing Qi et al. “Dynamic Focus Control in High-Speed Optical Coherence Tomography Based on a Microelectromechanical Mirror.” Optics Communications 232 (2004) 123-128. <www.elsevier.com/locate/optcom>.
D. Huang, E.A. Swanson, C.P. Lin, J.S. Schuman, W.G. Stinson, W. Chang, M.R. Hee, T. Flotte, K. Gregory, C.A. Puliafito, and J.G. Fujimoto. “Optical Coherence Tomography.” Science, 254, 1178-1181 (1991).
W. Drexler, U. Morgner, F.X. Kartner, C. Pitris, S.A. Boppart, X.D. Li, E.P. Ippen, and J.G. Fujimoto. “In vivo ultrahigh-resolution optical coherence tomography.” Optics Letters, 24, 1221-1223 (1999).
M. Ohmi, T. Kurata, M. Sekimoto, and M. Haruna. “Quasi in-focus optical coherence tomography.” Japanese Journal of Applied Physics Part 1-Regular Papers Short Notes & Review Papers, 43, 845-849 (2004).
Z.P. Chen, T.E. Milner, D. Dave, and J.S. Nelson, “Optical Doppler tomographic imaging of fluid flow velocity in highly scattering media.” Optics Letters, 22, 64-66 (1997).
J.M. Schmitt, S.L. Lee, and K.M. Yung. “An optical coherence microscope with enhanced resolving power in thick tissue.” Optics Communications, 142, 203-207 (1997).
F. Lexer, C.K. Hitzenberger, W. Drexler, S. Molebny, H. Sattmann, M. Sticker, and A.F. Fercher. “Dynamic coherent focus OCT with depth-independent transversal resolution.” Journal of Modern Optics, 46, 541-553 (1999).
B. Qi, A.P. Himmer, L.M. Gordon, X.D.V. Yang, L.D. Dickensheets, and I.A. Vitkin. “Dynamic focus control in high-speed optical coherence tomography based on a microelectromechanical mirror.” Optics Communications, 232, 123-128 (2004).
V.X.D. Yang, N. Munce, J. Pekar, M.L. Gordon, S. Lo, N.E. Marcon, B.C. Wilson, and I.A. Vitkin, “Micromachined array tip for multifocus fiber-based optical coherence tomography.” Optics Letters, 29, 1754-1756 (2004).
X.M. Liu, M.J. Cobb, Y.C. Chen, M.B. Kimmey, and X.D. Li. “Rapid-scanning forward-imaging miniature endoscope for real-time optical coherence tomography.” Optics Letters, 29, 1763-1765 (2004).
A.G. Podoleanu, J.A. Rogers, and D.A. Jackson. “Three dimensional OCT images from retina and skin.” Optics Express, 7, 292-298 (2000).
Y.C. Chen and X.D. Li. “Dispersion management up to the third order for real-time optical coherence tomography involving a phase or frequency modulator.” Optics Express, 12, 5968-5978 (2004).
G.J. Tearney, M.E. Brezinski, J.F. Southern, B.E. Bouma, M.R. Hee, and J.G. Fujimoto. “Determination of the Refractive-Index of Highly Scattering Human Tissue by Optical Coherence Tomography.” Optics Letters, 20, 2258-2260 (1995).
Anderson Ronald M.
Lyons Michael A.
University of Washington
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