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Related Experiment Videos

A telemeter without refractive optics

F A Abraham

    American Journal of Ophthalmology
    |January 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    The earliest telemeter, a conic tube device, was used in the first century A.D. This historical instrument allowed for distance measurement through adjustable diameters and binocular vision.

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    Area of Science:

    • Optics
    • Ancient Technologies

    Background:

    • The development of measurement tools has a long history.
    • Understanding early methods of distance estimation is crucial for technological history.

    Observation:

    • A conic tube device, adjustable by distal diameter, was utilized for measuring distances.
    • Binocular vision was employed in conjunction with this device.

    Findings:

    • This conic tube device represents the earliest known telemeter.
    • Its use is documented in the Talmud, dating back to the first century A.D.

    Implications:

    • This finding pushes back the timeline for sophisticated optical measurement devices.
    • It highlights the advanced understanding of optics and engineering in ancient societies.