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Transmitter and receiver units for spatial position measurement system

  • US 5,579,102 A
  • Filed: 10/05/1995
  • Issued: 11/26/1996
  • Est. Priority Date: 06/17/1991
  • Status: Expired due to Term
First Claim
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1. A laser transmitter unit for a spatial measurement system comprising:

  • a laser emitter;

    a bearing/motor assembly coupled to the laser emitter, the bearing/motor assembly including a rotatable hollow spindle shaft through which a laser beam generated by the laser emitter passes and a motor for driving the spindle shaft;

    a prism assembly coupled to the spindle shaft, wherein the prism assembly divides the laser beam generated by the laser emitter into a pair of fanned laser beams; and

    reflecting means for reflecting the fanned laser beams generated by the prism assembly as counter-rotating fanned laser beams.

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