Optical Flat for a Spherometer

Optical Flat for a Spherometer

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Usage conditions apply
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.
Currently not on view
Object Name
optical flat
date made
ca 1800s
Physical Description
glass (overall material)
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
catalog number
accession number
Credit Line
Gift of Department of Physics and Astronomy, Bowdoin College
See more items in
Medicine and Science: Physical Sciences
Science & Mathematics
Data Source
National Museum of American History
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