Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Petoscope> ?p ?o }
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- Petoscope abstract "A Petoscope is an optoelectronic device for detecting small, distant objects such as flying aircraft. The design, as described in 1936, consisted of an instrument with two parallel light paths. In each path was a collimating objective lens, a screen marked with many small, alternating opaque and transparent squares in a chequerboard pattern, and a second concentrating lens focused on a photocell. The two screens were inverted with respect to each other. This caused a small object in the instrument's field of view to produce differing signals in the two photocells, while a large object affected both light paths equally. The difference between the two signals was amplified and used to raise an alarm. At the beginning of World War II, the device was adapted for use in proximity fuses for bombs.The inventor was Alan S. Fitzgerald of Wynnewood, Pennsylvania, U.S.A., a Research Associate in Electrical Engineering at Swarthmore College.".
- Petoscope wikiPageID "23851721".
- Petoscope wikiPageLength "1764".
- Petoscope wikiPageOutDegree "8".
- Petoscope wikiPageRevisionID "702003462".
- Petoscope wikiPageWikiLink Category:Optoelectronics.
- Petoscope wikiPageWikiLink Concentrating_lens.
- Petoscope wikiPageWikiLink Objective_(optics).
- Petoscope wikiPageWikiLink Optoelectronics.
- Petoscope wikiPageWikiLink Photodetector.
- Petoscope wikiPageWikiLink Proximity_fuze.
- Petoscope wikiPageWikiLink Swarthmore_College.
- Petoscope wikiPageWikiLink World_War_II.
- Petoscope wikiPageWikiLinkText "petoscope".
- Petoscope wikiPageUsesTemplate Template:Reflist.
- Petoscope wikiPageUsesTemplate Template:Use_dmy_dates.
- Petoscope subject Category:Optoelectronics.
- Petoscope hypernym Device.
- Petoscope type Device.
- Petoscope comment "A Petoscope is an optoelectronic device for detecting small, distant objects such as flying aircraft. The design, as described in 1936, consisted of an instrument with two parallel light paths. In each path was a collimating objective lens, a screen marked with many small, alternating opaque and transparent squares in a chequerboard pattern, and a second concentrating lens focused on a photocell. The two screens were inverted with respect to each other.".
- Petoscope label "Petoscope".
- Petoscope sameAs Q7178487.
- Petoscope sameAs m.06_vh5v.
- Petoscope sameAs Q7178487.
- Petoscope wasDerivedFrom Petoscope?oldid=702003462.
- Petoscope isPrimaryTopicOf Petoscope.