Mechanically scanned interference pattern structured illumination imaging

We present a fully lensless single pixel imaging technique using mechanically scanned interference patterns. The method uses only simple; flat optics; no lenses; curved mirrors, or acousto-optics are used in pattern formation or detection. The resolution is limited by the numerical aperture of the angular access to the object, with a fundamental limit of a quarter wavelength and no fundamental limit on working distance. While it is slower than some similar techniques, the lack of a lens objective and simplification of the required optics could make it more applicable in difficult wavelength regimes such as UV or X-ray. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement