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Related Experiment Videos

The dotting lens.

J K Davis

    Journal of the American Optometric Association
    |May 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    A dotting lens improves focimeter accuracy by projecting a target dot onto the lens under test. This allows for simultaneous measurement of the sample, enhancing precision in optical testing.

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    Area of Science:

    • Optics
    • Optical Engineering
    • Metrology

    Background:

    • Focimeters are crucial for measuring lens parameters.
    • Accurate lens testing requires precise focusing and alignment.
    • Existing methods may have limitations in simultaneous measurement.

    Purpose of the Study:

    • To introduce and evaluate a novel dotting lens for focimeter applications.
    • To demonstrate the capability of simultaneous measurement using the dotting lens.
    • To enhance the precision and efficiency of lens testing procedures.

    Main Methods:

    • An auxiliary dotting lens was designed and integrated into a standard focimeter.
    • The dotting lens projects a reference dot onto the center of the lens under test.
    • A central aperture in the dotting lens allows for concurrent sample measurement.

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    Main Results:

    • The dotting lens successfully images a dot on the eyepiece scale, indicating the lens center.
    • Simultaneous measurement of the sample is achieved through the lens aperture.
    • The setup facilitates accurate and efficient lens parameter determination.

    Conclusions:

    • The dotting lens is an effective auxiliary tool for improving focimeter performance.
    • It enables precise alignment and simultaneous measurement, streamlining optical testing.
    • This innovation offers a practical solution for enhanced lens metrology.