Fasciculus:CGKilogram.jpg

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Descriptio

A computer-generated image of the International Prototype kilogram (IPK), which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of 39.17 mm. The IPK is kept at the Bureau International des Poids et Mesures (International Bureau of Weights and Measures) in Sèvres on the outskirts of Paris.

The geometry of this computer model was based on the actual specifications being used for experiments in new manufacturing techniques to produce new kilogram mass standards.

Solid model and ray-traced image was created using Cobalt CAD software.

This image was provided by the contributor because of the dearth of uncopyrighted photographs of the actual IPK. This is expected to be a chronic limitation given that…

  1. the IPK is stored in a vault nearly all the time,
  2. there is no general public access to the BIPM (and certainly none to the vault),
  3. and working copies of the IPK are used at the BIPM for routine calibrations for years on-end.
Datum Uploaded August 10, 2007
Fons Originally uploaded to English Wikipedia as CGKilogram.jpg
Auctor en:User:Greg L
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  • 19:00, August 10, 2007 . Greg L . 1400×1024 (535,748 bytes)
  • 08:30, August 10, 2007 . Greg L . 1024×740 (128,856 bytes) (A computer-generated image of the international prototype of the kilogram, which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of [[1 E-2 m|39 )

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Historia fasciculi

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Dies/TempusMinutioDimensionesUsorSententia
recentissima21:49, 5 Iunii 2017Minutum speculum redactionis 21:49, 5 Iunii 2017 factae1 400 × 1 024 (590 chiliocteti)GnashOptimized file size.
16:53, 20 Octobris 2009Minutum speculum redactionis 16:53, 20 Octobris 2009 factae1 400 × 1 024 (608 chiliocteti)Greg A LPicture carefully tweaked in contrast, brightness, and color balance to better work with monitors that use PC gamma
23:31, 17 Octobris 2009Minutum speculum redactionis 23:31, 17 Octobris 2009 factae1 400 × 1 024 (557 chiliocteti)Greg A LChange from absolutely absurd, crap job of lightening by previous editor. To that editor: Create a NEW file and use that if you like. Do not change this one.
22:59, 17 Octobris 2009Minutum speculum redactionis 22:59, 17 Octobris 2009 factae800 × 585 (26 chiliocteti)Orion 8more light
14:32, 11 Augusti 2007Minutum speculum redactionis 14:32, 11 Augusti 2007 factae1 400 × 1 024 (523 chiliocteti)EPO{{Information |Description=A computer-generated image of the '''International Prototype''' '''kilogram''' (IPK), which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of 39.

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