Möllenstedt biprism based shearing ptychographic iterative engine method.

Area of Science:

• * Optics and Photonics
• * Materials Science
• * Quantitative Phase Imaging

Background:

• * Classical lensless ptychographic iterative engine (PIE) offers high-resolution imaging but requires complex mechanical scanning.
• * Traditional PIE systems are cumbersome, especially for short-wavelength applications like X-ray and electron microscopy.
• * Simplifying imaging systems is crucial for broader adoption and application in advanced microscopy.

Purpose of the Study:

• * To develop a simplified PIE method that eliminates the need for mechanical sample scanning.
• * To introduce a Möllenstedt biprism based shearing PIE technique for efficient amplitude and phase retrieval.
• * To validate the method's accuracy and speed using numerical simulations and visible light experiments.

Main Methods:

• * Utilized a Möllenstedt biprism to generate two deflected waves with relative motion.
• * Employed voltage control on the biprism to achieve sample scanning without mechanical movement.
• * Applied PIE algorithms to reconstruct sample amplitude and phase from shearing diffraction patterns.

Main Results:

• * Successfully retrieved accurate sample amplitude and phase distributions.
• * Demonstrated high accuracy and fast convergence speed comparable to traditional PIE.
• * Showcased the method's robustness, performing well even without precise biprism calibration.

Conclusions:

• * Möllenstedt biprism based shearing PIE offers a simplified and effective alternative to traditional PIE.
• * The technique is suitable for quantitative imaging in short-wavelength microscopy.
• * This advancement facilitates more accessible and efficient high-resolution imaging applications.