To realize these benefits, a resolution limit associated with the numerical aperture of the probe-forming more » optics is imposed. When the resulting data are analyzed with a complimentary algorithm, reliable reconstructions which are robust to missing data are achieved. The experimental geometry of RPI is straightforward to implement, requires no near-field optics, and is applicable to extended samples.

Quantitative amplitude and phase images are then reconstructed from the resulting far-field diffraction pattern. In RPI, a sample is illuminated by a structured probe field containing speckles smaller than the sample’s typical feature size. We introduce a single-frame diffractive imaging method called randomized probe imaging (RPI). We discuss the method, introduce a reconstruction algorithm, and present two proof-of-concept experiments: one using visible light, and one using soft X-rays. RPI therefore offers an attractive modality for quantitative X-ray phase imaging when temporal resolution and reliability are critical but spatial resolution in the tens of nanometers is sufficient.

Thorlabs siemens star