Since liquid crystal display (LCD) screen locates outside of the camera′s field of view in fringe reflection photogrammetry, fringe is obtained through specular reflection by a fixed camera. Thus, the pose calibration between camera and LCD screen is the main challenge in fringe reflection photogrammetry. A markerless planar mirror is used to reflect the LCD screen 3 times, and the fringe is mapped into camera. The geometrical calibration can be accomplished by estimating the pose between the camera and virtual image of fringe. With the help of the relation beween their pose, incidence and reflection ray can be unified in the camera frame, triangulation can be operated in the camera frame to measure 3D shape of specular. Results of simulations and experiments demonstrate that the approach is simple, feasible and has high accuracy.