Binocular reflecting telescope.

摘要

A binocular reflecting telescope having two Cassegrain or Schmidt-Cassegrain reflecting mirror units having the same aperture and the same focal length, each having a concave primary mirror and a convex secondary mirror provided opposite to each other along each of two parallel first optical axes, two erect real image forming means each comprising a combination of plane mirrors for guiding a ray of light out of the first optical axis from a point between the primary mirror and the secondary mirror, and two eyepiece units rotatable about the optical axes of the light rays guided out of the two erect real image forming means.