Fichye:CGKilogram.jpg

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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.
Dat Uploaded August 10, 2007
Sous Originally uploaded to English Wikipedia as CGKilogram.jpg
Kreyatè 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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Dat ak lèMinyatiGrandè yoItilizatèKomantè
Kounye a5 jen 2017 à 21:49Minyati pou vèsyon 5 jen 2017 à 21:491 400 × 1 024 (590 kio)GnashOptimized file size.
20 oktòb 2009 à 16:53Minyati pou vèsyon 20 oktòb 2009 à 16:531 400 × 1 024 (608 kio)Greg A LPicture carefully tweaked in contrast, brightness, and color balance to better work with monitors that use PC gamma
17 oktòb 2009 à 23:31Minyati pou vèsyon 17 oktòb 2009 à 23:311 400 × 1 024 (557 kio)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.
17 oktòb 2009 à 22:59Minyati pou vèsyon 17 oktòb 2009 à 22:59800 × 585 (26 kio)Orion 8more light
11 out 2007 à 14:32Minyati pou vèsyon 11 out 2007 à 14:321 400 × 1 024 (523 kio)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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