Lensometer Jr.
name: label: maker
content: American Optical Company
label: maker
content: Spencer Lens Company
notes: label: Description
content: A lensometer (or lensmeter) is used to determine whether a lens has the refraction and power prescribed. Edgar Derry Tillyer, Director of Physics of the Wellsworth Scientific and Research Laboratories at Southbridge, Mass., introduced the basic form in 1922. An inscription on this example reads “Lensometer Jr. / Manufactured by / Spencer Lens Company / Scientific Instrument Division / American Optical Company / Model M603 / K5079 / Made in U.S.A.”
label: Description
content: Ref: “Tillyer, ’02, A Leader in his Field,” Rutgers Alumni Monthly (May 1922): 220.
label: Description
content: Charles Sheard and E. T. Tillyer, “The Lensmeter. An Instrument for the Measurement of the Effective or Vertex Power of Ophthalmic Lenses,” Journal of the Optical Society of America (Dec. 1922): 1030-1039.
label: Description
content: “Dr. Edgar D. Tillyer, 89; Eyeglass Lens Developer,” New York Times (Dec. 26, 1970): 20.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Medicine
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ZZ.RSN83566U36
objectType: label: Object Name
content: Lensometer
label: Other Terms
content: Lensometer; Apparatus, Testing, Eye; Medicine
physicalDescription: label: Measurements
content: overall: 27.6 cm x 19 cm x 48 cm; 10 7/8 in x 7 1/2 in x 18 7/8 in