The paper considers afocal compensators correcting various aberrations of optical systems such as spherical aberration, coma, astigmatism, surface curvature, chromatic aberrations. For illustration, the considered optical compensator schemes are reproduced.
The possibility of constructing the optical system with an aplanatic correction of aberrations representing generally combination of the thin lens with an aplanatic meniscus and plane-parallel plate of small thickness is shown.
The possibility of a stigmatic and aplanatic correction of third-order aberrations in the image, which is formed by the positive lens system is showed and the conditions for such a correction are determine. The relations defining the position of the entrance pupil of a thin lens, in which the image formed in the absence of primary coma and astigmatism, was obtained.