optical bench
Date1880-1910
Inventory Number2020a
ClassificationOptical Bench
Subject
Maker
Ferdinand Ernecke
?
fl. 1859 - 1915
User
University of Cambridge, Department of Physics
founded 1874
Cultural Region
Place of Origin
Dimensions39.4 × 99.7 × 14 cm (15 1/2 × 39 1/4 × 5 1/2 in.)
Material
Accessoriessee 2020b
Bibliography
DescriptionThe bench consists of a heavy rail supported by two crosspieces at each end acting as feet. On the rail are six sliding carriers on top of which are height-adjustable brass columns (using the big thumb screw). Each has a different optical accessory for polarization, spectral analysis or microscopy.
From right to left: 1) round platform on top of which is a prism; 2) Nicol prism in cylinder, removable from its supporting brackets; 3) lens encased in black diaphragm; 4) specimen holder in-between two condenser lenses, one of which adjustable horizontally; 5) double lens, one encased in black diaphragm; 6) glass plates analyzer. Other accessories also fit on this bench (see 2020b).
From right to left: 1) round platform on top of which is a prism; 2) Nicol prism in cylinder, removable from its supporting brackets; 3) lens encased in black diaphragm; 4) specimen holder in-between two condenser lenses, one of which adjustable horizontally; 5) double lens, one encased in black diaphragm; 6) glass plates analyzer. Other accessories also fit on this bench (see 2020b).
Signedunsigned
Curatorial RemarksThough unmarked, this optical bench is very similar in design to the one advertised by Ernecke in the catalogue mentioned in the primary sources. In the catalogue it is described as "Grosse optische Bank nach Paalzow, zur objektiven Darstellung der Polarisations-Erscheinungen, Spektral-Analyse und Mikroskopie."
ProvenanceFrom the Department of Physics, Jefferson Laboratory, Harvard University.
Ferdinand Ernecke
Date: 1880-1910
Accessories: wooden base
Object number: 2020b
Heinrich Daniel Ruhmkorff
Date: 1860-1875
Object number: 2006-1-0013
Carl Zeiss Jena
Date: 1914
Object number: 1996-1-0652a
Heinrich Daniel Ruhmkorff
Date: 1860-1875
Object number: 1996-1-0531
Jean Baptiste François Soleil
Date: 1825-1850
Accessories: drawer with optical parts
Object number: 1997-1-0088
Central Scientific Company
Date: 1935-1950
Object number: 1997-1-0356
Carl Friedrich Zeiss
Date: 1885
Accessories: oculars (2): 5, 5 x 1.5; objectives (2): aa and E with canisters; Abbe condensor with swing-out mount for disk diaphragms; disk diaphragms (6); 2 cup diaphragm / cylinder stop holders; cup diaphragms (3); nicol prism polarizer in half canister; instrument case; stereoscopic eyepiece (1126c); camera lucida (1126b); blood corpuscle counting apparatus (1126d).
Object number: 1126a
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
See also/See also
