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Ruling engine using adjustable diamond and interferometric control for high-quality gratings and large echelles.

Xiaotao Mi, Shanwen Zhang, Xiangdong Qi

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    |September 11, 2019
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    Summary
    This summary is machine-generated.

    Nanoscale groove positioning in ruling engines is improved by a new diamond carriage concept. This innovation enhances grating accuracy, reducing light scattering and increasing groove density for optical applications.

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    Area of Science:

    • Optical Engineering
    • Metrology
    • Nanotechnology

    Background:

    • Ruling engines are crucial for fabricating diffraction gratings.
    • Achieving nanoscale precision in groove positioning is essential for high-performance optical components.
    • Existing ruling engines face limitations in accuracy and groove density.

    Purpose of the Study:

    • To propose a novel concept for precise diamond positioning in ruling engines.
    • To enhance the accuracy and groove density capabilities of the CIOMP-6 ruling engine.
    • To improve the quality of ruled gratings for spectrometer and interferometer applications.

    Main Methods:

    • Fabrication of a specialized diamond carriage.
    • Design of an optimized optical path for positioning.
    • Development of a precise control method for the ruling engine.
    • Ruling of high-quality gratings with improved parameters.

    Main Results:

    • Significant reduction in the intensity of ghosts and scattered light in echelle gratings (79 grooves/mm) by 50%.
    • Increase in the maximum achievable groove density from 6000 grooves/mm to 8000 grooves/mm.
    • Demonstrated substantial improvement in the accuracy of the CIOMP-6 ruling engine.

    Conclusions:

    • The proposed concept for diamond position adjustment enables nanoscale groove positioning.
    • The implemented improvements significantly enhance ruling engine accuracy and grating quality.
    • This advancement is critical for developing advanced spectrometers and interferometers.