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Reflective dual field-of-view optical system based on the Alvarez principle.

Lucas Zettlitzer, Herbert Gross, Stefan Risse

    Applied Optics
    |December 1, 2023
    PubMed
    Summary

    A new dual-state reflective optical relay system offers two magnifications for remote sensing. Its compact design with freeform mirrors provides near diffraction-limited performance for infrared space applications.

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    Area of Science:

    • Optical Engineering
    • Remote Sensing Technology
    • Space Optics

    Background:

    • Traditional optical relay systems often lack flexibility in magnification for diverse remote sensing needs.
    • Existing systems may be bulky or lack the precision required for space-based infrared applications.

    Purpose of the Study:

    • To propose a novel dual-state reflective optical relay system based on the Alvarez system.
    • To demonstrate its capability for achieving two different magnifications while maintaining constant image and pupil positions.
    • To highlight its suitability for remote sensing applications, particularly in space.

    Main Methods:

    • Design and analysis of a dual-state reflective optical relay system utilizing freeform optical mirrors.
    • Integration with a telescope to achieve variable magnification.
    • Performance evaluation at an infrared wavelength of 8 µm.

    Main Results:

    • A compact optical relay system with only two moving parts was developed.
    • The system demonstrated a nearly diffraction-limited performance at 8 µm.
    • Achieved dual-magnification capability by maintaining constant image and pupil positions.

    Conclusions:

    • The proposed Alvarez-based dual-state reflective optical relay system is a compact and high-performance solution.
    • Its features make it an attractive subsystem for infrared remote sensing applications in space.
    • Design tradeoffs and layout properties were analyzed for practical implementation.