polarizer
Date1870-1920
Inventory Number1998-1-0264
ClassificationPolarizer
Subject
Maker
American
?
Cultural Region
Dimensions20 × 32 × 6.3 cm (7 7/8 × 12 5/8 × 2 1/2 in.)
Material
DescriptionThe moving part of this instrument is encased within a sturdy brass frame. The moving part consists of a circular window in which is found a polarizer lens. This lens can be positioned sideways by sliding horizontally using the hand crank. A wingnut screw secures the moving plate in place. A scale divided in single millimeters shows the displacement. The lens can also rotate by a rack and pinion mechanism, the handle is missing. A scale 0-180°-0, divided in increments of five degrees, determines the rotation.
Signedunsigned
ProvenanceTransferred to CHSI from the Department of Engineering, Pierce Hall, Harvard University, May 25, 1957.
Heinrich Daniel Ruhmkorff
Date: 1860-1880
Accessories: instrument parts of various shapes and sizes (b)
Object number: 1997-1-0255a
E. Hartnack & A. Prazmowski
Date: circa 1880
Accessories: objectives in green leather box (5): 2, 4, 6, 7, and unmarked; objectives in brown box (2): 2, 3; oculars (5); 1, 2, 3, 4, 5; polarizing eyepiece and substage apparatus; substage condenser; substage cup diaphragms (4); slider with sleeve to hold substage accessories; large bull's eye condenser with stand; aperture-stop rotating wheel; blue filters (3); flat case; case keys (2).
Object number: 1145a
William Cary
Date: 1789-1825
Accessories: small eyepiece (box)
Object number: 5230a
Ernst Leitz (company)
Date: 1950-1960
Accessories: carrying case; power cord
Object number: 1997-1-1084
Ernst Leitz (company)
Date: circa 1919
Accessories: oculars (2): 3, 8x; accessory box; Leitz objectives (5); wrenches (2); ground glass; N.A. 1.45 condensor cap; Abbe condensor; rotary stage; case
Object number: 1345
W. & L. E. Gurley
Date: ca. 1884
Accessories: solar attachment; case; level; green filter; sun shade; tripod (5163b)
Object number: 5163a
Ernst Leitz (company)
Date: circa 1937
Accessories: standard eyepieces (3): 8X P, Periplan. OK 10X, and Periplan. Ok. 25X; wide eyepieces (3): 1, 1, 8X, 10X; objectives (4) in fitted case: 1b 4.3X, 3 10X, P7 62X, P 1/12 oel; waveplates (2); condenser with polarizer; mechanical stage; loupe 6x; box of cover glasses; standing case; key; objective adaptors (4); and watch keys (2)
Object number: 1999-1-0020a
Bausch & Lomb Optical Company
Date: 1908-1910
Accessories: ocular; objective; standing case
Object number: 1209
