| 摘要 |
A method of obtaining by use of a laser measuring apparatus position measurement error information of a body to be moved under computer control i n a volumetric space along paths having designated measuring points for positi on error evaluation or correction. The method in a preferred form includes the steps of directing a laser beam in a given direction in said space and placi ng a laser beam reflector on the body to be moved in directions non-parallel to said direction, the reflector being sufficiently large that it will receive and reflect said directed laser beam back to said apparatus for actual reflector distance measurement along the beam path as said body is so moved. Then, with the computer of said system moving said body along said non- parallel paths measuring and recording with said apparatus the actual positions of said reflector along said beam path as the body reaches said various measuring points. The actual reflector position measurements are compared with the ideal reflector measurements and from the reflector positi on error so determined the body position error components at said measuring points are computed.
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