Imaging Bypass System with Correction for Primary Mirror Distortions

Just after the very holography invention it was 2 to apply the holographic methods for the non-distorted imaging through the media with the phase distortions (the so called one way image correction technique). Later on the base of these first ideas there was elaborated the proposal to apply the holographic correction technique to the distortions, imposed the primary mirror (PM) of the telescope, imaging the remote objects34. In these works the successful holographic correction was realized on the base of the static hologram of the PM distortions, recorded from this PM center of curvature in the Twyman-Greene interferometer. The hologram was processed and then mounted in the focal unit of the telescope. imaging the remote object. Later similar experiments were carried out in the USA57. This method, obviously. can be applied only to the static distortions. At the same time the difficulties due to the necessity to take the hologram out for the processing and then to mount it in the proper position with the high accuracy prevented the wide application of the method.