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Throughput of tilted interferometers.

J Genest, P Tremblay, A Villemaire

    Applied Optics
    |February 21, 2008
    PubMed
    Summary
    This summary is machine-generated.

    The maximum acceptable off-axis angle in tilted Fourier-transform spectrometers (FTS) decreases with detector distance and tilt angle. This limits throughput, impacting both scanning and stationary FTS designs.

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    Area of Science:

    • Spectroscopy
    • Optical Engineering
    • Interferometry

    Background:

    • Fourier-transform spectrometers (FTS) are crucial for spectral analysis.
    • Tilted configurations offer spatial dispersion without moving parts.
    • Understanding throughput limitations is vital for instrument design.

    Purpose of the Study:

    • To calculate the throughput of a tilted Fourier-transform spectrometer (FTS) with collimation.
    • To determine the factors limiting the maximum acceptable off-axis angle.
    • To analyze the impact of tilt angle on FTS performance.

    Main Methods:

    • Theoretical calculation of throughput for a tilted FTS.
    • Analysis of the relationship between off-axis angle, detector distance, and tilt angle.

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  • Experimental verification of the derived throughput conditions.

    • Main Results:

    • Maximum acceptable off-axis angle is inversely proportional to detector-tilt distance and tilt angle.
    • Tilt sensitivity is introduced in scanning FTS.
    • Throughput advantage is lost in stationary tilted FTS designs.

    Conclusions:

    • The tilt angle significantly impacts the throughput of tilted FTS.
    • Instrument design must account for these limitations to maintain performance.
    • Experimental results validate the theoretical throughput calculations.