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OTF measurements with a white light source: an interferometric technique.

J C Wyant

    Applied Optics
    |February 16, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Grating lateral shear interferometers can measure the optical transfer function and optical coherence function for white light sources. This study investigates their suitability and describes potential interferometer designs for white light measurements.

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    Area of Science:

    • Optics and Photonics
    • Interferometry
    • Optical Metrology

    Background:

    • Measuring the optical transfer function (OTF) is crucial for characterizing optical systems.
    • White light sources present unique challenges for OTF measurements due to their broad spectral content.
    • Traditional interferometric methods may not be directly applicable to white light OTF analysis.

    Purpose of the Study:

    • To investigate the feasibility of using lateral shear interferometers for white light OTF measurements.
    • To determine if grating lateral shear interferometers meet the requirements for white light optical coherence function (OCF) and OTF measurements.
    • To describe potential configurations of grating lateral shear interferometers.

    Main Methods:

    • Theoretical analysis of lateral shear interferometer performance with white light.
    • Investigation of grating-based lateral shear configurations.
    • Evaluation of requirements for measuring OTF and OCF simultaneously.

    Main Results:

    • Grating lateral shear interferometers are shown to be suitable for measuring both OTF and OCF with white light.
    • The study confirms that these interferometers fulfill the necessary requirements for such measurements.
    • Several specific grating lateral shear interferometer designs are presented.

    Conclusions:

    • Lateral shear interferometry, particularly with gratings, offers a viable method for white light optical system characterization.
    • The described interferometers provide a pathway for accurate OTF and OCF determination under broadband illumination.
    • This research advances white light metrology for optical system evaluation.