For example, the borosilicate glass Schott "'BK7 "'is an extremely common crown glass, used in precision lenses.
22.
For example, the higher dispersion flint glasses have " V " < 55 whereas the lower dispersion crown glasses have larger Abbe numbers.
23.
These lenses are used for UV photography, as the quartz glass has a lower extinction rate than lens made with more common crown glass formulas.
24.
:Flint glass and crown glass can be replaced by any two materials with different Keenan Pepper 13 : 35, 6 January 2006 ( UTC)
25.
These tend to be based on the material composition, for example " BK7 " is the Schott Glass classification of a common crown glass.
26.
As well as the specific material named " crown glass ", there are other optical glasses with similar properties that are also called crown glasses.
27.
As well as the specific material named " crown glass ", there are other optical glasses with similar properties that are also called crown glasses.
28.
Glass with weaker dispersive power ( greater v ) is named " crown glass "; that with greater dispersive power, " flint glass ".
29.
The town had early forges and saw mills, grist mills and tanneries, and in 1812, the Cheshire Crown Glass Company opened, as did a triphammer operation.
30.
In collaboration ( 1827-1832 ) with optician George Dollond, Barlow built an achromatic lens that utilized liquid carbon disulfide . ( Achromatic lenses were important crown glass.
