Porte Lumiere

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Like a heliostat, a porte lumiere throws sunlight where it might be used for photography or scientific observations. But while a heliostat is moved by clockwork, a porte lumiere is moved by hand. This incomplete example consists of a rectangular mirror (6 inches wide; 11.25 inches long), and a circular mirror (8 inches diameter).
Ref: Maison Jules Duboscq, Historique & Catalogue de tous les Instruments d’Optique Supérieure Appliqués aux Sciences et à l’Industrie (Paris, 1885), p. 2.
J. W. Queen & Co., Priced and Illustrated Catalogue of Optical Lanterns and Projecting Apparatus (Philadelphia, 1889), p. 29.
Currently not on view
date made
late 19th century
overall: 18 in; 45.72 cm
overall: 17 7/16 in x 9 3/4 in x 8 1/8 in; 44.29125 cm x 24.765 cm x 20.6375 cm
ID Number
accession number
catalog number
Credit Line
Bowdoin College
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Science & Mathematics
Data Source
National Museum of American History