Abstract: In order to obtain a 1-D or 2-D moire pattern, a holographic film is adhered to the surface of the specimen and a densely covered grating is prepared in the film by holographic interference directly. A warping wavefront generated by a load is recorded, then the film is removed from the specimen for treatment; This method has many advantages and has broad prospects of applications, because it combines and simplifies the preparation of grating and measuring process.This paper expounds principles of the prepar...