Talk:Crown glass (optics)

From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Glass (Rated Start-class, High-importance)
WikiProject icon This article is within the scope of WikiProject Glass, a collaborative effort to improve the coverage of glass on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Start-Class article Start  This article has been rated as Start-Class on the quality scale.
 High  This article has been rated as High-importance on the importance scale.
 
WikiProject Physics (Rated Start-class, Low-importance)
WikiProject icon This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Start-Class article Start  This article has been rated as Start-Class on the project's quality scale.
 Low  This article has been rated as Low-importance on the project's importance scale.
 

Fluorite[edit]

Fluorite (calcium fluoride) is otherwise used to make glass turbid, which is normally undesirable i optical glass. Is it used for other purposes too? The article on Abbe numbers indicates that it would lower the dispersion of crown-glass, but this needs confirmation. —Preceding unsigned comment added by 150.227.15.253 (talk) 13:15, 22 March 2010 (UTC)

It is used for some of the elements in expensive apochromatic lenses, which provide better correction of aberrations than the more common achromat lenses. I have used fluorite microscope objective lenses. See Fluoride glass for other applications. --Srleffler (talk) 04:19, 23 March 2010 (UTC)