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Related Experiment Video

Updated: May 12, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Published on: January 28, 2019

Two-step spatial phase-shifting radial shearing interferometery with circular gratings.

Jia Wang¹, Yang Song, Zhen-hua Li

¹Department of Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, China.

|April 3, 2013

Summary

This study introduces a novel radial shearing interferometry technique using circular gratings. It accurately measures wavefront phase derivatives, demonstrating feasibility with spherical waves and propane flames.

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Published on: August 12, 2013

Area of Science:

* Optics and Photonics
* Wavefront Sensing and Metrology

Background:

* Interferometry is crucial for precise optical measurements.
* Measuring wavefront phase derivatives is essential for optical system characterization and aberration analysis.

Purpose of the Study:

* To present a simple radial shearing interferometry system for measuring the radial first-order derivative of arbitrary wavefront phase.
* To demonstrate a two-step phase-shifting algorithm for accurate phase retrieval from interferograms.

Main Methods:

* Utilized circular gratings for radial shearing interferometry.
* Developed a system to simultaneously obtain two spatial phase-shifted radial shearing interferograms.
* Implemented a two-step phase-shifting algorithm with arbitrary phase-shift values for phase retrieval.

Main Results:

* Successfully measured the radial first-order derivative of spherical wavefront phase, validating the system's feasibility and accuracy.
* Applied the optical system to measure the wavefront phase derivative of a propane flame under plane incident wave conditions.

Conclusions:

* The proposed radial shearing interferometry with circular gratings offers a simple and effective method for wavefront phase derivative measurement.
* The technique is versatile, applicable to various wavefront types and potentially useful in fields like fluid dynamics and plasma diagnostics.