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Coherent diffraction imaging and lens position correction by a transversely moving lens.

Zhengyu Wu, Yutong Li, Qiang Wang

|August 12, 2025

Summary

This study presents a novel lateral lens method for wavefront reconstruction, offering superior accuracy over axial techniques. The approach includes error correction strategies and highlights the importance of phase information in optical systems.

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Area of Science:

Optics and Photonics
Optical Metrology
Wavefront Sensing

Background:

Accurate wavefront reconstruction is crucial for optical system performance.
Existing axial methods for phase retrieval can be limited in accuracy.
Understanding beam propagation requires precise amplitude and phase information.

Purpose of the Study:

To introduce a novel wavefront reconstruction method using a laterally moving lens.
To compare the accuracy of the lateral method against traditional axial techniques.
To develop error models for correcting lens position inaccuracies in optical systems.

Main Methods:

Wavefront reconstruction via lateral lens movement.
Integration of amplitude-phase retrieval algorithms.
Development of error models and corrective strategies for lens positioning.
Experimental validation of the proposed technique.

Main Results:

The lateral lens methodology demonstrates superior accuracy compared to axial methods.
Effective error models and corrective strategies were developed to mitigate position errors.
Phase information was shown to be critical for accurate phase retrieval and lateral error correction.
Experimental results confirmed the technique's ability to retrieve sample amplitude and phase.

Conclusions:

The proposed lateral lens approach offers a more accurate method for wavefront reconstruction.
The developed error correction strategies enhance the robustness of optical measurements.
This work emphasizes the significant role of phase information in optical metrology and system calibration.