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Distance measuring device

  • US 5,493,388 A
  • Filed: 08/11/1994
  • Issued: 02/20/1996
  • Est. Priority Date: 09/02/1993
  • Status: Expired due to Term
First Claim
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1. A distance measuring device of laser beam using type, comprising:

  • first means for producing laser beams;

    second means for projecting said laser beams against an object, said second means including a polygon mirror to and by which said laser beams are directed and reflected;

    third means for receiving the laser beams reflected by said object; and

    fourth means for measuring the period required for said laser beams to make the trip around the object,wherein said polygon mirror is so arranged as to be rotated about a first axis thereof and swung about a second axis thereof.

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