Small aperture telescope optical system

Many optical telescopes have been used to observe cosmic rays, with small-aperture telescopes for gamma photons in the high-energy band and large-aperture telescopes for gamma photons in the low-energy band. Here, we will choose a telescope with an aperture of 6 m to observe gamma rays in the ultra-high energy range. The reflector of the telescope is designed by Davies-cotton. The radius of curvature of the telescope is 16 m, the focal plane is located at 8 m, and the half width of the spot expansion is 10 mm.