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    This study presents a new all-reflective cross-grating spectrometer. This compact instrument achieves high spectral resolution across a wide wavelength range without moving parts, demonstrated by plant leaf spectra analysis.

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    Area of Science:

    • Spectroscopy
    • Optical Engineering
    • Instrument Development

    Background:

    • Echelle spectrometers offer high resolution but are complex.
    • Curved-grating instruments are compact but have limitations.
    • Cross-grating spectrometers aim to combine high resolution and wide spectral range in a compact design.

    Purpose of the Study:

    • To realize and detail an all-reflective cross-grating spectrometer.
    • To demonstrate its performance for spectral measurements.
    • To offer a compact spectrometer solution without moving parts.

    Main Methods:

    • Designed an all-reflective cross-grating spectrometer.
    • Utilized a modified Czerny-Turner configuration.
    • Incorporated a folded beam path and toric-convex mirror for aberration correction.

    Main Results:

    • Achieved a spectral resolution of 0.6 nm at 589 nm.
    • Covered an accessible wavelength range from 330 to 1100 nm.
    • Successfully recorded spectra of plant leaves.

    Conclusions:

    • The developed cross-grating spectrometer effectively bridges the gap between existing technologies.
    • It offers a compact, high-performance solution for spectral analysis.
    • Demonstrated applicability in biological sample analysis.