In telecommunications and fiber optics, ovality or noncircularity is the degree of deviation from perfect circularity of the cross section of the core or cladding of the fiber. The cross-sections of the core and cladding are assumed to a first approximation to be elliptical, and ovality is defined to be twice the third flattening of the ellipse, 2 a − b a + b {\displaystyle 2{\frac {a-b}{a+b}}} , where a is the length of the major axis and b is the length of the minor axis.
In telecommunications and fiber optics, ovality or noncircularity is the degree of deviation from perfect circularity of the cross section of the core or cladding of the fiber. The cross-sections of the core and cladding are assumed to a first approximation to be elliptical, and ovality is defined to be twice the third flattening of the ellipse, 2 a − b a + b {\displaystyle 2{\frac {a-b}{a+b}}} , where a is the length of the major axis and b is the length of the minor axis.
Source: Wikipedia "Ovality" · CC BY-SA 4.0
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