Positioning device for optical coating film detection and positioning method thereof

The positioning device comprises a base, two vertical plates, a fine adjustment detection assembly and two lifting positioning assemblies, the vertical plates are symmetrically locked and installed on the two sides of the upper surface of the base, the fine adjustment detection assembly is installed at the top between the two vertical plates, and the lifting positioning assemblies are assembled in the vertical plates. And the lifting positioning assembly and the fine adjustment detection assembly are correspondingly arranged. The clamping plates are pushed to get close to and get away from each other in the positioning seat, the two ends of a to-be-detected object are clamped and fixed in the positioning seat, the to-be-detected object is turned over through the turnover motor, synchronous detection work on all faces of the to-be-detected object is achieved on the equipment, and under the assistance of the fine adjustment detection assembly, the detection efficiency is greatly improved. The optical thickness