polariscope
Date1850-1890
Inventory NumberDW0868
ClassificationPolariscope
Subject
Maker
French
?
Cultural Region
Dimensions49.5 x 29 x 29 cm (19 1/2 x 11 7/16 x 11 7/16 in.)
Material
DescriptionAt one end, there is a black mirror fixed at an angle of 45 degrees and used to polarize the light. At the other end is an eyepiece containing an ocular lens equipped with a (Nicol prism?) analyzer. Between them is a pivoting spring clip that could hold various lenses. The arm on which all these parts are attached can be tilted vertically. The arm itself is supported by a brass stand on a folding tripod.
Signedunsigned
FunctionThis instrument is used to look at the polarization of light. When light is polarized, only wavelengths of a determined orientation are passing through. By putting a crystal, liquid or any other transparent material in between the polarized light and the observer, the orientation of the light will be changed by a certain amount of degrees. The angular measurement of the rotated polarized light provides information about the structure of the material used in the experiment.
ProvenanceDavid Wheatland purchased from Alain Brieux, Paris, September 23, 1962 (lot 8a/29).
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
Jean Baptiste François Soleil
Date: 1840-1860
Accessories: carrying case; objective; double refraction ocular; substage polarizer; rotating stage plate; horizontal case; stage forceps; oculars (2)
Object number: 1215
Andrew Pritchard
Date: 1835-1840
Accessories: objectives (4); oculars (6); lieberkühns (4); stage forceps; bull's eye condenser on stand; spring stage; extra mechanical stage; polarizer; cup diaphragms and holders; substage fork mount; live box; glass troughs (2); concave glass; fish tube holder; case; 2 keys. See also slide micrometers (2) (1088b,c)
Object number: 1088a
Charles-Louis Chevalier
Date: circa 1840
Accessories: 2 convertible objectives: 1, 2, 3 and 0,00,000; 2 oculars; simple magnifiers: 3 and 5, with support bracket; extension pillar; bull's eye stage condenser on jointed arm; forceps; 3 prepared slides; box of cover glasses; 1/100 mm stage micrometer; camera lucida; tall bell jar; padlock on chain; case with key; table of magnifications
Object number: 1079
Jean Baptiste François Soleil
Date: circa 1840
Accessories: eyepiece; circular supports (2)
Object number: 2015
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