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Large-aperture space optical system testing based on the scanning Hartmann.

Haisong Wei, Feng Yan, Xindong Chen

    Applied Optics
    |April 5, 2017
    PubMed
    Summary
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    A new scanning Hartmann testing technology offers a cost-effective method for evaluating large-aperture space optical systems. This wavefront measurement technique simplifies testing and accurately assesses imaging quality, overcoming limitations of traditional methods.

    Area of Science:

    • Optical Engineering
    • Astronomy and Astrophysics

    Background:

    • Traditional testing of large-aperture space optical systems often relies on complex and costly collimator setups.
    • Existing methods may face challenges in efficiently performing wavefront measurements for large optical systems.

    Purpose of the Study:

    • To introduce and validate a novel scanning Hartmann testing technology for large-aperture space optical systems.
    • To demonstrate the advantages of this new technology over conventional testing approaches.

    Main Methods:

    • The study is based on the Hartmann testing principle, adapted for scanning applications.
    • It involves presenting the basic testing principle, data processing, and simulation procedures.
    • A measuring system was developed for experimental validation.

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    Main Results:

    • Simulation results verified the feasibility of the scanning Hartmann testing technology.
    • Experimental measurements on a 200 mm aperture system showed a small deviation (6.3% RMS) compared to interferometric results.
    • The system accurately measured low-order aberrations.

    Conclusions:

    • The scanning Hartmann testing technology is a feasible and advantageous method for testing the imaging quality of large-aperture space optical systems.
    • Its simple structure and low cost make it a practical alternative to traditional methods.
    • The technology demonstrates the ability to perform accurate wavefront measurements.