New aperture lens as apochromats for astronomical research

The domestic glass melting industry has made significant progress in the development of new optical materials, in particular the special low-dispersion glass. Thanks to these materials, we can observe the increased interest to the optical lens system with significantly reduced secondary spectrum, the so-called apochromats. Using a special optimization program of ray-tracing, the authors investigated a numerically significant number of lens options -apochromats that can be used in astronomical research. The authors calculated several promising new lenses -apochromats with the corrected secondary spectrum of special glasses that allowed to increase the aperture ratio and the quality of correction of aberrations.