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Plaetje: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.
Datum Uploaded August 10, 2007
Brón Originally uploaded to English Wikipedia as CGKilogram.jpg
Sjriever 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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Datum/TiedMiniatuurplaetjeAafmaetingeGebroekerKómmentaar
hujig5 jun 2017 23:49Miniatuurplaetje veur versie per 5 jun 2017 23:491.400 × 1.024 (590 kB)GnashOptimized file size.
20 okt 2009 18:53Miniatuurplaetje veur versie per 20 okt 2009 18:531.400 × 1.024 (608 kB)Greg A LPicture carefully tweaked in contrast, brightness, and color balance to better work with monitors that use PC gamma
18 okt 2009 01:31Miniatuurplaetje veur versie per 18 okt 2009 01:311.400 × 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.
18 okt 2009 00:59Miniatuurplaetje veur versie per 18 okt 2009 00:59800 × 585 (26 kB)Orion 8more light
11 aug 2007 16:32Miniatuurplaetje veur versie per 11 aug 2007 16:321.400 × 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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