Method and device for detecting and adjusting common sphere center of spherical reflector

The invention relates to a method and device for detecting and adjusting the common spherical center of a spherical reflector. A point light source becomes parallel light through a collimating lens, and a polarization splitting prism divides the parallel light into reflected light S and transmission light P of which the vibration directions are perpendicular; the transmission light is reflected bythe rear surface of a 45-degree optical rotation wafer, passes through the optical rotation wafer again, and is completely reflected by the polarization splitting prism to enter a detector to serve as reference light; the transmission light of the 45-degree optical rotation wafer is focused into a point light source through a focusing lens, emitted spherical wave is reflected by a spherical reflector, returns along an original optical path, passes through the optical rotation wafer again, is completely reflected by the polarization splitting prism to enter a receiver as test light to interfere with the reference ligh