| 摘要 |
FIELD: X-ray equipment. SUBSTANCE: laser centralizer of X-ray radiator has case housing TV camera which optical axis is parallel to longitudinal axis of X-ray radiator, mirror made of acrylic plastic directing laser beams collinear with X-ray beam on object, scale, two microlasers placed in symmetry and in parallel to optical axis of TV camera which form images of laser spots with constant distance between them independent of distance to object with the help of first mirror. Lens of TV camera is zoom lens that forms in plane of CCD matrix of TV camera images of laser spots on object which are observed on screen of videomonitor simultaneously with images of reference marks formed on CCD matrix of TV camera with the use of second mirror that is semitransparent. Centralizer also has microlens and diaphragm with holes illuminated by additional light source. Lens of TV camera incorporates mechanism that changes focal distance, has scale graduated directly in distance values between X-ray radiator and lens which is employed to make distances between images of laser spots and reference marks exactly equal. Present value of distance between X-ray radiator and object is read from scale of lens at this moment. EFFECT: widened application field, reduced power of employed laser and dimensions of centralizer, enhanced precision and simplified technique of use of centralizer. 1 dwg |
