The path from the beginning of FINCH to single shot 3D imaging beyond optical resolution

We chronicle a 15-year development effort of Fresnel incoherent correlation holography (FINCH) since its first description to its current 3D current microscopic wide-field or confocal imaging that doubles optical resolution beyond the Rayleigh limit to about 100 nm in a single snapshot. The path from the original demonstration of FINCH [Opt. Lett.32, 912 (2007) OPLEDP0146-959210.1364/OL.32.000912] to its current picture-perfect imaging of multicolor fluorescent biological specimens and reference test patterns by fluorescence or reflected light imaging is described.