| 摘要 |
<p>The invention relates to an arrangement for compensating errors in measurement due to curved beam paths when determining heights with the aid of light emitted from a stationary height-determining instrument (H) onto a height-detecting arrangement (ST). The light transmitter unit of the height-determining instrument (H) emits at least two light beams, each having a different, narrow wavelength region. The height-detecting arrangement (ST) includes a light receiver unit which indicates vertical hits of light emitted from the height-determining instrument (1) in said wavelength regions. A calculating unit calculates a correction factor on the basis of the difference between the indicated hit-points and also calculates the height that the emitted light would have had without being bent, on the basis of the height of the indicated hit and on the basis of the correction factor and presents the calculated height on an indicating unit (IND).</p> |
