| 摘要 |
PCT No. PCT/DE93/00628 Sec. 371 Date Mar. 3, 1995 Sec. 102(e) Date Mar. 3, 1995 PCT Filed Jul. 14, 1993 PCT Pub. No. WO94/03775 PCT Pub. Date Feb. 17, 1994The description relates to a process for determining the location of a positioning body in relation to a reference body and a device for implementing it. The positioning body (10) bears a scale with evenly spaced markings and the reference body comprises a scanner (12) with a projection surface on which the mark (16) of the scale are projected and imaging optics. The coordinates of the center of projection of the imaging optics are calculated by evaluating the mark (16) arranged on the scale. Here, coded marks of two perpendicular surface scales of the scale or the positioning body are decoded and at least four centers of intersection regions of the marks of both surface scales confining an area are determined. The calculation is made via the protective relationship between the projection surface of the scanner and the plane of the scale bearing the marks.
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