Wavefield imaging via iterative retrieval based on phase modulation diversity.

Area of Science:

• Optics and Photonics
• Microscopy
• Wavefield Imaging

Background:

• Accurate characterization of scalar coherent beams is crucial for various optical applications.
• Traditional wavefield retrieval methods often rely on interferometry, which can be complex and sensitive to environmental conditions.
• Developing non-interferometric techniques offers a more accessible and robust alternative.

Purpose of the Study:

• To present a fast and robust non-interferometric approach for retrieving the amplitude and phase distributions of scalar coherent beams.
• To demonstrate the applicability of this method in standard imaging systems and microscopy.
• To showcase its capabilities for advanced imaging techniques such as super-resolution, numerical refocusing, quantitative imaging, and phase mapping.

Main Methods:

• The method utilizes diverse intensity measurements obtained under controlled astigmatism.
• It does not require interferometric setups, simplifying implementation.
• The approach is integrated into standard imaging systems for practical application.

Main Results:

• The non-interferometric wavefield retrieval approach was successfully implemented and validated.
• Experimental studies in microscopy demonstrated its effectiveness.
• The method proved capable of achieving image super-resolution, numerical refocusing, quantitative imaging, and phase mapping.

Conclusions:

• The presented non-interferometric method provides a fast, robust, and easily implementable solution for scalar coherent beam wavefield retrieval.
• This technique significantly expands the possibilities for advanced imaging in microscopy and other optical fields.
• It offers a practical alternative to interferometric methods for amplitude and phase imaging.