Prism Binoculars
date: label: patent date
content: 1897-06-22
label: production dates
content: ca 1900-1920
label: date made
content: 1900-1920
name: label: licensor
content: Zeiss, Carl
label: maker
content: Bausch & Lomb Optical Company
notes: label: Description
content: This is a brass instrument covered, in large part, with dark leather. The exposed parts have a black japan finish. The objective lenses are 9 mm diameter. The eye end of the left prism housing is marked “Zeiss Stereo Field Glass / PAT. JUNE 22, 97 / Power +8.” That on the right is marked “Bausch & Lomb Optical Co. / ROCHESTER, N.Y.” The top of the center post is marked “7530.” The eyepieces are separately adjustable, as is the inter-ocular distance and the focus overall.
label: Description
content: Bausch & Lomb was licensed by Carl Zeiss, Jena, to produce prism binoculars under Ernst Abbe’s several patents, using Schott glass made in Jena. The central focus, as found in this example, is a feature that Zeiss added after 1900.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Rochester
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Science & Mathematics
label: See more items in
content: Optics
creditLine: label: Credit Line
content: Nicholas Grossman
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1982.0001.02
label: accession number
content: 1982.0001
label: catalog number
content: 1982.0001.02
objectType: label: Object Name
content: binoculars
physicalDescription: label: Physical Description
content: aluminum (principal overall material)
label: Physical Description
content: brass (crossbars, posts, etc. material)
label: Physical Description
content: leather (scope covering material)
label: Physical Description
content: glass (lens material)
label: Physical Description
content: black (overall color)
label: Physical Description
content: painted (overall production method/technique)
label: Measurements
content: closed: 102 cm x 120 cm x 50 cm; 40 5/32 in x 47 1/4 in x 19 11/16 in
label: Measurements
content: overall: 110 mm x 135 mm; 4 5/16 in x 5 5/16 in
label: Measurements
content: overall: 2 1/2 in x 4 3/4 in x 4 1/8 in; 6.35 cm x 12.065 cm x 10.4775 cm