We propose using the time multiplexing super resolution method in order to extend the depth of focus of an imaging system. In standard time multiplexing the super resolution is achieved by generating duplication of the optical transfer function in the spectrum domain by using moving gratings. By changing the grating's frequency, and by that changing the duplication positions, it is possible to obtain an extended depth of focus. Using the same concept, it is also possible to correct geometrical aberrations of the imaging lens. The proposed method is presented analytically, demonstrated via numerical simulations, and validated by a laboratory experiments.
Asaf Ilovitsh, Gilad Rand, Shilo Levavi, and Zeev Zalevsky, "Extended depth of focus and aberration correction using time multiplexing," Proc. SPIE 10077, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XIV, 100770Q (Presented at SPIE BiOS: February 01, 2017; Published: 22 February 2017); https://doi.org/10.1117/12.2250273.
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