- This AO-Baker Interference microscope is a compound binocular with coarse and fine focus, circular mechanical stage, sub-stage mirror, and U-shaped base. The inscription on the front reads “AO / Spencer.” That underneath the base reads “B-35-83 Instrument Division / American Optical Co. / Buffalo 15, N.Y. MADE IN USA / U.S. Pat. / 2,474,644 / DES 148,123 / OR 148,124.” The 373366 serial number on the back of the base indicates a date of around 1955.
- The American Optical Company introduced the AO-Baker interference microscope in 1955, noting that it was “so accurate that it can resolve 35,000 units of measurement in the thickness of this page.”
- Ref: T. G. Aitcheson, et. al., “Pivotal Mounting Means for Microscope Arms and the Like,” U.S. Patent 2,474,644 (June 28, 1949).
- American Optical Co. ad in Transactions of the American Microscopical Society 74 (Oct. 1955).
- Currently not on view
- Object Name
- microscope attatchments
- date made
- ca 1995
- American Optical Company
- place made
- United States: New York, Buffalo
- case of attachments: 2 3/4 in x 5 3/4 in x 4 1/4 in; 6.985 cm x 14.605 cm x 10.795 cm
- ID Number
- 1980.0468.01 [dup1]
- accession number
- catalog number
- Credit Line
- Mr. Oscar W. Richards
- Science & Scientific Instruments
- Data Source
- National Museum of American History
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