Based on the idea of measuring micro deformation of objects with optical levers,a de-vice for measuring the curvature radius of a lens was constructed by combining the optical lever and the Michelson interferometer mobile platform.Using the geometric relationship between the tip posi-tion of the optical lever and the spherical surface where the convex lens was located,the measurement formula of the curvature radius was derived,and the curvature radius of the lens of different specifica-tions was measured.The measurement values of the curvature radius of the device were compared with those gotten using the Newton ring device,and the two methods were similar.
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