Three-view-field compact infrared optical telescopic system

The invention discloses a three-view-field compact infrared optical telescopic system, and belongs to the technical field of aviation infrared detection and investigation. The secondary mirror, the primary mirror, the first eyepiece, the second eyepiece and the third eyepiece form a small-view-field optical mode, and the middle-view-field first objective lens, the middle-view-field second objective lens, the primary mirror, the first eyepiece, the second eyepiece and the third eyepiece form a middle-view-field optical mode. A large-field-of-view first objective lens, a large-field-of-view second objective lens, a primary mirror, a first eyepiece, a second eyepiece and a third eyepiece form a large-field-of-view optical mode. The primary mirror, the first eyepiece, the second eyepiece and the third eyepiece are optical fixed groups, the secondary mirror, the first objective lens of the middle view field, the second objective lens of the middle view field, the first objective lens of the large view field and th