| 摘要 |
PURPOSE:To shorten the measuring time, by projecting each light pattern, which is formed by a plurality of codes, on a body to be measured, picking up the images at the different positions, binary-coding the picture, and computing the position of the body to be measured based on trigonometry. CONSTITUTION:Light 7 from a projector 6 including a light source 12 and a mask 13 is projected on a body to be detected 1. The image, which is picked up by a TV camera 8, is processed by a processing circuit with a memory, which controls the projector 6. In this case, the mask 13 having light shielding property is constituted of masks 13a-13c having slit holes 14a-14c. The measurable region of the body 1 is divided into 8 regions. A picture 15 when the light 7 is not projected is stored in the memory. The level of the picture 15 is subtracted for each picture element of a picture 16 when the mask 13a is used. The difference is discriminated by a specified value. A binary-coded picture pattern is operated and stored in another memory. The masks 13b and 13c are sequentially used, and a position Q is computed by trigonometry from theoretical values Qa, Qb and Qc. |
