Optical fabrication and testing: a historical review
Optical fabrication and testing techniques are more
than two thousand years old. It was discovered in
1927 that as far back as 1600 B.C., crystal magnifier lenses
were made in Crete. Spectacles were invented around the
year 1260. The next great advance came when the Dutch
microscopist Anthony von Leewenhoek in 1719 made his
own small magnifying lenses to examine microscopic objects.
He discovered microorganisms with his small lenses.
The manufacturing details until this time are not well
known, and probably no attempt was made to test the
quality of the surfaces.
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