Optical component mounting structure

The invention belongs to the technical field of precise alignment measurement, and particularly discloses an optical assembly mounting structure which comprises a focus detection illumination lens barrel, a first main lens barrel, a second main lens barrel, an alignment imaging lens barrel, a first prism fixing barrel and a second prism fixing barrel. The focus detection illumination lens barrel, the second main lens barrel, the alignment imaging lens barrel and the second prism fixing barrel are all connected with the first main lens barrel in a light-permeable manner, and the first prism fixing barrel is connected with the second main lens barrel in a light-permeable manner; the focus detection illumination lens cone, the first main lens cone, the second main lens cone, the first prism fixing barrel and the lens installed in the first prism fixing barrel form a focus detection illumination lens; the first prism fixing barrel, the second main lens barrel, the first main lens barrel, the alignment imaging len