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Telescopes of galileo.

V Greco, G Molesini, F Quercioli

|September 22, 2010

Summary

Galileo

Area of Science:

Optical Engineering
History of Science
Astronomy

Background:

The Istituto e Museo di Storia della Scienza in Florence holds historical astronomical instruments.
Two complete telescopes and one objective lens attributed to Galileo Galilei are part of this collection.
These valuable historical optics offer insights into early telescopic technology.

Purpose of the Study:

To perform optical testing on Galileo's telescopes and objective lens.
To measure key optical parameters like focal length and radii of curvature.
To evaluate the optical quality and performance of these historical instruments using modern techniques.

Main Methods:

Non-destructive optical testing of individual lenses and complete telescopes.
Measurement of focal length and radii of curvature.

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Interferometric evaluation of surface quality and overall performance at 633 nm (He-Ne laser).

Main Results:

Individual optical parameters of the lenses were determined.
The optical layout of the telescopes was reconstructed.
The telescopes demonstrated optical performance approaching diffraction-limited operation.

Conclusions:

Galileo's telescope optics were of remarkably high quality for their time.
Modern optical testing validates the sophisticated design and manufacturing of these early astronomical instruments.
The findings contribute to understanding the technological capabilities of the scientific revolution.