Abstract: The concentric glass spherical shell with the uniform thickness has been dominantly chosen as the transparent window

in front of the optical lens of airborne opto-electronic platforms. When the centers of spheres on the inside and outside surface have been misaligned during the producing

there exists the additional pointing error. In this paper

the theoretical expression concerning the optical path has been derived. The experimental result indicates that the measurement agrees well with the theoretical result. When the concentric misalignment of the spherical centers is 0.26 mm

the axial pointing error at 45 degree field of view reaches 0.075 degree

much bigger than the limitation which is set as 0.029 degree (0.5 mrad). In order to reduce the pointing error to 0.017 degree (0.3 mrad)

the concentric misalignment has been expected under 0.10 mm.