CIE Chromaticity Diagram

[Xe54]

Hi:

Here is the one in use by American Opto Plus:

Click link at bottom of this page:
http://www.aopinc.net/cgi-bin/v04/dbv04/display.cgi

Whereas this one is very different:

http://hyperphysics.phy-astr.gsu.edu/hbase/vision/cie1976.html

Which is currently the correct diagram?

 

[simbad]

I found this diagram