| 摘要 |
PURPOSE:To obtain data for forming a stereoscopic image simply, by providing a diffraction spot, whose luminance is large, in a diffraction spot, which is projected on an object body, and obtaining the coordinate position of each diffraction spot with the spot as a reference. CONSTITUTION:When light is projected on a diffraction spot projecting part 5 from a laser light source 6, a light beam Lbs are projected. Due to the irregularity and the position relationship on an object body 7, the intervals among the positions of lattice shaped diffraction spots on the body are changed. The changes are grasped by a TV camera 8, undergo A/D conversion, and stored in a frame memory 10. The frame memory 10 is accessed by a CPU11, and the position data and the luminance data are obtained. Based on various conditions such as the geometrical position conditions of a light projecting part and a light receiving part and the aberrations of two optical systems, the distances between the body and the light source 6 and the camera 8 are changed variously by using the object body, which is to become a reference. Thus the position relationship for every diffraction spot is obtained. |
