FIG. 1. An example of the optical configurations used to avoid the interference between two reference waves for the proposed method.
FIG. 2. (a) Spatial frequency contents of a conventional digital hologram; each circle means the spatial frequency contents involved in each term. (b) Spatial frequency contents of two digital holograms in this method; each circle means the spatial frequency contents involved in each term. The overlap region of R1*O can be replaced with the non-overlap region of R2*O.
FIG. 3. (a) The USAF 1951 test target image and (b) 3D height map assumed by 100 nm maximum height for the simulation.
FIG. 4. (a) Simulated hologram where the inlet shows the interference pattern from the tilted reference wave and (b) the spatial frequency contents of (a) in the conventional off-axis DH.
FIG. 5. (a) Simulated hologram where the inlet shows the interference patterns from two tilted reference wave and (b) the spatial frequency contents of (a) in the new off-axis DH. The overlapping region is replaced with the non-overlapping region.
FIG. 6. Spatial frequency contents of the object wave using the conventional band pass filtering method and (b) new method with the replacement.
FIG. 7. (a) Reconstructed image of the USAF target and (b) reconstructed 3D height map by the proposed method.
FIG. 8. Enlarged 3D height maps in the “-2” region of the target from (a) conventional method and (b) new method.
FIG. 9. Height difference between the reconstructed and original height maps.
References
- J. Kuhn, T. Colomb, F. Montfort, F. Charriere, Y. Emery, E. Cuche, P. Marquet, and C. Depeursinge, "Real-time dual-wavelength digital holographic microscopy with a single hologram acquisition," Opt. Express 15, 7231-7242 (2007). https://doi.org/10.1364/OE.15.007231
- P. Ferraro, S. Grilli, D. Alfieri, S. D. Nicola, A. Finizio, G. Pierattini, B. Javidi, G. Coppola, and V. Striano, "Extended focused image in microscopy by digital holography," Opt. Express 13, 6738-6749 (2005). https://doi.org/10.1364/OPEX.13.006738
- T. Colomb, J. Kuhn, F. Charriere, and C. Depeursinge, "Total aberrations compensation in digital holographic microscopy with a reference conjugated hologram," Opt. Express 14, 4300-4306 (2006). https://doi.org/10.1364/OE.14.004300
- F. Charriere, N. Pavillon, T. Colomb, C. Depeursinge, T. J. Heger, E. A. D. Mitchell, P. Marquet, and B. Rappaz, "Living specimen tomography by digital holographic microscopy: morphometry of testate amoeba," Opt. Express 14, 7005-7013 (2006). https://doi.org/10.1364/OE.14.007005
- E. Cuche, P. Marquet, and C. Depeursinge, "Simultaneous amplitude-contrast and quantitative phase-contrast microscopy by numerical reconstruction of Fresnel off-axis holograms," Appl. Opt. 38, 6994-7001 (1999). https://doi.org/10.1364/AO.38.006994
- I. Yamaguchi and T. Zhang, "Phase-shifting digital holography," Opt. Lett. 22, 1268-1270 (1997). https://doi.org/10.1364/OL.22.001268
- Y. Awatsuji, T. Koyama, T. Tahara, K. Ito, Y. Shimozato, A. Kaneko, K. Nishio, S. Ura, T. Kubota, and O. Matobga, "Parallel optical-path-length-shifting digital holography," Appl. Opt. 48, H160-H167 (2009). https://doi.org/10.1364/AO.48.00H160
- T. M. Kreis and W. P. O. Juptner, "Suppression of the DC term in digital holography," Opt. Eng. 36, 2357-2360 (1997). https://doi.org/10.1117/1.601426
- E. Cuche, P. Marquet, and C. Depeursinge, "Spatial filtering for zero-order and twin-image elimination in digital off-axis holography," Appl. Opt. 39, 4070-4075 (2000). https://doi.org/10.1364/AO.39.004070
- M. K. Kim, J. Gass, and A. Dakoff, "Phase imaging using multi-wavelength digital holography," US patent 6,809,845 B1 (2004).
- N. Pavillon, C. S. Seelamantula, J. Kühn, M. Unser, and C. Depeursinge, "Suppression of the zero-order term in off-axis digital holography through nonlinear filtering," Appl. Opt. 48, H186-H195 (2009). https://doi.org/10.1364/AO.48.00H186
- N. Pavillon, C. Arfire, I. Bergoend, and C. Depeursinge, "Iterative method for zero-order suppression in off-axis digital holography," Opt. Express 18, 15318-15331 (2010). https://doi.org/10.1364/OE.18.015318
- E. Cuche, P. Marquet, and C. Depeursinge, "Aperture apodization using cubic spline interpolation: application in digital holographic microscopy," Opt. Commun. 182, 59-69 (2000). https://doi.org/10.1016/S0030-4018(00)00747-1