Optical system of large-view-field continuous zooming collimator

The invention discloses an optical system of a large-view-field continuous zoom collimator. The optical system comprises a first objective lens assembly, a second objective lens assembly, a third objective lens assembly, a fourth objective lens assembly and a fifth objective lens assembly. The first objective lens assembly is a front fixed group, the second objective lens assembly is a zoom group, the third objective lens assembly is a middle fixed group, the fourth objective lens assembly is a compensation group, and the fifth objective lens assembly is a rear fixed group. According to the system, continuous zooming of the optical system is realized by changing the positions of the second objective lens group and the fourth objective lens group, so that an infinite target is generated, and an efficient, high-precision and convenient detection means is provided for debugging and detection of the imaging optical system. According to the optical system of the zoom collimator, on the basis of meeting the zoom ra