File:CGKilogram.jpg

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Descrision

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.
Data Uploaded August 10, 2007
Provenjiensa Originally uploaded to English Wikipedia as CGKilogram.jpg
Autore 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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Data/OraMiniaduraDimensionUtenteComento
In ultima23:49, 5 xug 2017Miniadura de la version de le 23:49, 5 xug 20171 400 × 1 024 (590 KB)GnashOptimized file size.
18:53, 20 oto 2009Miniadura de la version de le 18:53, 20 oto 20091 400 × 1 024 (608 KB)Greg A LPicture carefully tweaked in contrast, brightness, and color balance to better work with monitors that use PC gamma
01:31, 18 oto 2009Miniadura de la version de le 01:31, 18 oto 20091 400 × 1 024 (557 KB)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.
00:59, 18 oto 2009Miniadura de la version de le 00:59, 18 oto 2009800 × 585 (26 KB)Orion 8more light
16:32, 11 ago 2007Miniadura de la version de le 16:32, 11 ago 20071 400 × 1 024 (523 KB)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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