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Description: | none DES KERR,John,Reverend circa 1878 Glasgow Scotland MANU Unsigned. circa 1878 Glasgow Scotland This is a large liquid cell shaped rather like a table tennis bat with square corners. The centre of the 'bat' has been removed leaving a roughly square cell. There are three holes for electrodes one passes down the centre of the 'handle' into the cell two others from the top corners of the 'bat' diagonally into the cell.
Kerr filled the cell with dielectric liquids such as nitrobenzene, dichloromethane and carbon disulphide. To demonstrate 'the Kerr electro-optic effect' the cell was connected to a high voltage source, about 4 Kv, in the form of a Rumkorff induction coil or a Holtz influence machine. Kerr found that the plane of polarisation of light passing through the cell was rotated. Because of the speed of the effect Kerr cells were used in early television cameras to modulate light, they have also been used as shutters in ultra high speed cameras.
This example is one of those listed by Green and Lloyd,1970, Kelvin's instruments and the Kelvin Museum, p. 63 as an unspecified number of cells.On loan to the Physics and Astronomy Department EXIT NUMBER 2092 it is object 18 in display case D Kelvin & 'the New Professors ', in room 470, The Kelvin Building, Department of Physics and Astronomy Glasgow University. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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