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Range00:59

Range

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The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
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The perpendicular-axis theorem states that the moment of inertia of a planar object about an axis perpendicular to its plane is equal to the sum of the moments of inertia about two mutually perpendicular concurrent axes lying in the plane of the body.
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The parallel-axis theorem provides a convenient and quick method of finding the moment of inertia of an object about an axis parallel to the axis passing through its center of mass. Consider a thin rod as an example. There is a striking similarity between the process of finding the moment of inertia of a thin rod about an axis through its middle, where the center of mass lies, and about an axis through its end using the conventional method. In the conventional method, the concept of linear mass...
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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On-axis intensity modulation-free, segmented, zero-order Bessel beams with tunable ranges.

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    Researchers created a new method for generating tunable Bessel beams using hollow Gaussian beams (HGBs). This technique enhances on-axis peak intensity and beam range, offering versatile applications in optics.

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    Area of Science:

    • Optics and Photonics
    • Beam Shaping Technology

    Background:

    • Bessel beams are non-diffracting beams with unique propagation characteristics.
    • Generating high-quality Bessel beams with controlled properties remains a challenge.

    Purpose of the Study:

    • To propose and demonstrate a novel experimental scheme for generating zero-order quasi-Bessel beams.
    • To achieve tunable ranges and high on-axis peak intensity.
    • To explore Bessel beam generation using hollow Gaussian beams (HGBs).

    Main Methods:

    • Illuminating an axicon with hollow Gaussian beams (HGBs) of varying orders.
    • Utilizing the dark core of HGBs to mitigate axicon imperfections.
    • Employing single-pass second-harmonic generation in nonlinear crystals to verify results.

    Main Results:

    • Generated segmented, smooth, zero-order quasi-Bessel beams with tunable ranges.
    • Observed decreased range and increased on-axis peak intensity with higher-order HGBs.
    • Demonstrated increased Bessel beam range by superposing HGBs of different orders.

    Conclusions:

    • The proposed method effectively generates high-quality Bessel beams with controllable properties.
    • Hollow Gaussian beams offer advantages for Bessel beam generation, improving intensity and range.
    • The technique allows for Bessel beams with diverse intensity profiles, including single-peak and multiple-peak distributions.