Spherical sector

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Related to Spherical sector: Spherical segment
See under Sector.

See also: Spherical

References in periodicals archive ?
A spherical sector double focusing electrostatic spectrometer has been used in previous studies of ion-atom collisions (Shy 1987, Berry et al.
It does not appear that he ever built such a thing, although he identified the fundamental aspect of lens technology: Every lens is composed of spherical sectors.