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Automatic vertometer for spherical ophthalmic lenses.

T Tsuruta, M Kishi, T Gonda

    Applied Optics
    |February 2, 2010
    PubMed
    Summary
    This summary is machine-generated.

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    A new automated vertometer precisely centers and marks ophthalmic lenses. This advanced optical instrument significantly improves accuracy over manual methods for lens testing.

    Area of Science:

    • Ophthalmic optics
    • Optical instrumentation
    • Metrology

    Background:

    • Accurate measurement of ophthalmic lens parameters is crucial for visual correction.
    • Manual lens centering and marking can be time-consuming and prone to inaccuracies.
    • Existing vertometers may lack full automation in target focusing, lens centering, and marking.

    Purpose of the Study:

    • To design and develop an automated vertometer for spherical ophthalmic lenses.
    • To achieve precise and automated focusing, centering, and marking of lens centers.
    • To enhance measurement accuracy and efficiency compared to traditional methods.

    Main Methods:

    • Development of a vertometer incorporating automated target focusing and lens centering mechanisms.
    • Utilisation of a scanning unit to detect target image deviation in three dimensions.

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  • Generation of control signals to simultaneously adjust target and lens positions for optimal alignment.

    • Main Results:

    • The automated vertometer successfully focuses, centers, and marks lens centers within specified tolerances.
    • Achieved measurement accuracy approximately five times greater than visual examination.
    • Demonstrated reliable performance through detailed experimental validation.

    Conclusions:

    • The designed automated vertometer offers a significant advancement in ophthalmic lens testing.
    • The system provides high accuracy and efficiency for centering and marking spherical lenses.
    • This technology has the potential to improve quality control in ophthalmic lens manufacturing.