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Double diaphragm
The rectangular plate, with two holes, carries two rotating diaphragms: one is circular, and has 8 round, 2 oval, 3 triangular, and 2 rectangular apertures; the other is semicircular, with 4 pairs of holes and 3 round apertures of different diameters.
Creator
- Europeana
Publisher
- Museo Galileo - Istituto e Museo di Storia della Scienza
Subject
- Optics
- optics
Type of item
- Diaphragm
- scientific instruments
Medium
- brass
- Brass
- brass (alloy)
Providing institution
Rights statement for the media in this item (unless otherwise specified)
- http://rightsstatements.org/vocab/InC/1.0/
- http://rightsstatements.org/vocab/InC/1.0/
Rights
- © Museo Galileo - Istituto e Museo di Storia della Scienza
Creation date
- second half 18th cent.
- 1800
- 1751
Identifier
- urn:imss:instrument:406032
Extent
- 140x204 mm
Language
- eng
- ita
Is part of
- Lorraine collection
References
- http://catalogue.museogalileo.it/indepth/Diaphragm.html
Year
- 1751
- 1800
Providing country
- Italy