Optical Flat for a Spherometer

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Description
An optical flat is a disc of heavy glass made perfectly flat that is used to zero out a spherometer before use in order to assure the device produces an accurate reading. A spherometer is a small device used primarily for measuring the curvature of objects such as lenses and curved mirrors. For further information about spherometers, see object MA.315739. This flat accompanies spherometer 2001.0217.07.
Location
Currently not on view
date made
ca 1800s
Physical Description
glass (overall material)
Measurements
overall: 1.3 cm x 10.8 cm x 10.8 cm; 1/2 in x 4 1/4 in x 4 1/4 in
overall: 1/2 in x 4 1/4 in; 1.27 cm x 10.795 cm
ID Number
2001.0217.08
catalog number
2001.0217.08
accession number
2001.0217
Credit Line
Gift of Department of Physics and Astronomy, Bowdoin College
subject
Mathematics
See more items in
Medicine and Science: Physical Sciences
Science & Mathematics
Spherometers
Data Source
National Museum of American History, Kenneth E. Behring Center

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