meridional plane

meridional plane

[mə′rid·ē·ən·əl ′plān]
(optics)
A plane containing the axis of an optical system. Also known as tangential plane.
References in periodicals archive ?
Note that the orbit of particle is confined to the plane defined by the effective potential, this plane is known as meridional plane.
i] are selected along the circle for the radius of r, with the same angular interval ps in the range of 0[degrees] [less than or equal to] [theta] [less than or equal to] 90[degrees], both on the azimuth plane ([psi] = 0[degrees]) and the meridional plane ([psi] = 90[degrees]).
ms90] are the subtended angle of the reflector in the azimuth plane and meridional plane, respectively.
The more consistent the feed radiation patterns in the azimuth plane and meridional plane are, the better far-field response of the reflector IRA is [27].
5), an asymmetric power pattern in the meridional plane with an up-shift of 15[degrees] (Fig.
where x = {A, B, C, D, E, F, w, w1, a3, a4, h7, t2}, mld(x) is the main lobe direction of the power pattern in the meridional plane for x.
6, the VSWR is improved dramatically in the bandwidth ranging from 100 MHz to 1200 MHz, while the main lobe direction of the power pattern in the meridional plane is 0[degrees] compared with 15[degrees] given in [31].