MULTI-AXIAL OPTICAL OBJECTIVE FOR AN OPTICAL READ HEAD IN A FACSIMILE SYSTEM

摘要

10.11.78 1 PHF 77.586 Mult-axial optical objective for an optical read head in a facsimile system A multi-axial objective, comprising a number of adjacently arranged elementary systems which are formed by three spheres, the centres of which are situated on the same line, said systems being symmetrically arranged with respect to the centre of the central sphere. The refractive index of the central sphere is larger than the refractive index of the outer spheres. The entrance and the exit of each system are adjoined by windows which form an entrance pupil and an exit pupil, the former being arranged in the centre of the entrance sphere, whilst the latter is arranged in the centre of the exit sphere, The windows are proportioned with respect to the diameter of the spheres so that the field of each system overlaps the field of the directly adjoining systems, the field image of the multi-axial objective being uniformly illuminated.