An Abbe diagram plots the Abbe number against refractive index for a range of different glasses (red dots). Glasses are classified using a letter-number code to reflect their composition and position on the diagram. Data plotted from the Schott Glass catalogue.
<a href="//commons.wikimedia.org/wiki/User:%D0%94.%D0%98%D0%BB%D1%8C%D0%B8%D0%BD" title="User:Д.Ильин">Д.Ильин</a>: optimization, translation
<a href="//commons.wikimedia.org/wiki/File:Abbe-diagram_2.svg" title="File:Abbe-diagram 2.svg">File:Abbe-diagram 2.svg</a> by <a href="https://en.wikipedia.org/wiki/User:DrBob" class="extiw" title="en:User:DrBob">Bob Mellish</a>, <a href="//commons.wikimedia.org/wiki/User:Eric_Bajart" title="User:Eric Bajart">Eric Bajart</a>