| 摘要 |
A method and apparatus measuring the orientation of the body in space with respect to first, second and third orthogonal axes, by projecting a collimated beam of light onto a non-axially-symmetrical mirror carried by the body in space; directing the light beam reflected from the mirror through an instrument measuring beam deflections or curvatures; and measuring the beam deflections or curvatures about the three axes to determine the orientation of the body in space.
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