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Coherent optical processing using noncoherent light after source masking.

V Boopathi, R M Vasu

    Applied Optics
    |August 19, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel method for coherent optical processing using noncoherent light. The technique enhances spatial coherence, enabling effective Fourier transformations and image deblurring with improved blemish tolerance.

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    Area of Science:

    • Optics and Photonics
    • Information Processing

    Background:

    • Traditional coherent optical processing requires spatially coherent illumination, which can be difficult to achieve and maintain.
    • Noncoherent illumination sources are more practical but cannot directly perform coherent optical processing operations.

    Purpose of the Study:

    • To develop a method for achieving coherent optical processing using spatially noncoherent illumination.
    • To demonstrate the feasibility of Fourier transformation and image deblurring with the proposed system.
    • To evaluate the blemish tolerance of the new processing system.

    Main Methods:

    • Introducing spatial coherence in the far field by modulating a noncoherent source with masks exhibiting sharp autocorrelation.
    • Measuring the far-field mutual coherence function of light to assess coherence properties.
    • Performing standard coherent optical processing tasks like Fourier transformation and image deblurring.
    • Defining and evaluating a coherence-redundancy merit function.

    Main Results:

    • A large area with a high and flat mutual coherence function was achieved in the far field.
    • Successful demonstration of Fourier transformation and image deblurring using the generated coherent light.
    • The proposed system exhibits superior blemish tolerance compared to traditional coherent processors.

    Conclusions:

    • Coherent optical processing can be effectively performed using spatially noncoherent illumination by introducing spatial coherence in the far field.
    • The developed method offers a practical alternative to traditional coherent optical processing, with enhanced robustness to system imperfections.