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Updated: Jun 16, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

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

Published on: January 28, 2019

Coherent optical target recognition through a phase distorting medium.

H W Rose, T L Williamson, F T Yu

    Applied Optics
    |January 23, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new imaging technique to identify objects obscured by phase distortion. By analyzing the autocorrelation function of an object's spatial density spectrum, it overcomes limitations of conventional imaging methods.

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    Last Updated: Jun 16, 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

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    Area of Science:

    • Optical imaging
    • Signal processing
    • Phase distortion analysis

    Background:

    • Conventional imaging techniques fail when phase-distorting media are present.
    • Distinguishing targets under such conditions requires advanced methods.

    Purpose of the Study:

    • To develop and present a novel technique for target identification in the presence of phase distortion.
    • To demonstrate the effectiveness of this method compared to conventional imaging.

    Main Methods:

    • Recording the spatial density spectrum of a coherently illuminated object.
    • Computing the Fourier transform to obtain the autocorrelation function.
    • Comparing the derived autocorrelation function against a library of known functions.

    Main Results:

    • The proposed method successfully distinguishes targets even with significant phase distortion.
    • Experimental results show phase distortion severely degrades conventional images but minimally affects the autocorrelation function.

    Conclusions:

    • The autocorrelation function analysis is a robust technique for imaging through phase-distorting media.
    • This method offers a viable alternative when conventional imaging is compromised.