The invention discloses a compact type coaxial
refraction and reflection type
telescope objective. The surfaces of all components of the
telescope objective are spherical surfaces. The
telescope objective comprises a front-group concave lens, a front-group positive lens, a main reflecting mirror, a
Mangin mirror, a rear-group concave lens and three rear-group positive lenses, wherein the telescopeobjective is in
rotational symmetry relative to a main
optical axis, and an aperture diaphragm is positioned on a main reflecting mirror; the middle of the front-group concave lens, the middle of thefront-group positive lens and the middle of the main reflecting mirror are independently provided with a hole; after an incident
ray from ground scenery is refracted through the front-group lenses, the incident
ray reaches the main reflecting mirror; after the incident
ray is focused, the incident ray passes through the front surface, the rear surface and the front surface of the
Mangin mirror insequence without hindering in sequence; and after the incident ray is refracted by the rear-group concave lens and three rear-group positive lenses in sequence, the incident ray passes through the center hole of the main reflecting mirror without hindering to finally reach an image surface. The telescope objective has the advantages of long
focal length, low cost, small volume, light weight, compact structure, good
imaging quality, easiness in
processing and adjustment and the like.