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Temporally-stable active precision mount for large optics.

Claudia Reinlein, Christoph Damm, Nicolas Lange

    Optics Express
    |July 14, 2016
    PubMed
    Summary

    This study introduces a stable active mount that corrects manufacturing errors in optical mirrors. The mount effectively compensates for deformations, ensuring high-quality optical performance for large reflective components.

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    Area of Science:

    • Optical Engineering
    • Materials Science

    Background:

    • Manufacturing processes can induce deformations in reflective optical components, impacting system performance.
    • Active compensation methods are crucial for maintaining optical precision in demanding applications.

    Purpose of the Study:

    • To design and evaluate a temporally-stable active mount for compensating manufacturing-induced deformations in reflective optics.
    • To assess the mount's effectiveness on different mirror sizes and its long-term stability.

    Main Methods:

    • Development of an active mount with integrated actuators.
    • Testing the mount with a quarter mirror (115 × 105 × 9 mm³) and a full mirror (228 × 210 × 9 mm³).
    • Long-term measurements (14 weeks and 46 days) to evaluate temporal stability and positional independence.

    Main Results:

    • A quarter mirror with 20 actuators achieved a best wavefront error root mean square (rms) of 10 nm.
    • Deformations were found to be independent of installation orientation over 14 weeks.
    • A full mirror with 80 actuators demonstrated a wavefront error rms of (27±2) nm over 46 days.

    Conclusions:

    • The developed active mount effectively compensates for manufacturing-induced deformations in large reflective optics.
    • The mount exhibits temporal stability and is suitable for integration into overall system alignment procedures.