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Bouncing oscillating scanning device for laser scanning apparatus

  • US 4,958,894 A
  • Filed: 01/23/1989
  • Issued: 09/25/1990
  • Est. Priority Date: 01/23/1989
  • Status: Expired due to Term
First Claim
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1. A beam sweeping apparatus for use in a scanning device, said apparatus comprising a movable member arranged to be oscillated about an axis in an arc for sweeping a beam of light in a predetermined path, said arc having a pair of end points, a pair of stop members located adjacent said movable member to establish the limits of the excursion of said movable member and thereby define said end points of said arc, and reversible moving means comprising energizable means operative to be periodically energized by discrete pulses of electrical energy, one of said discrete pulses causing said movable member to move in one rotational direction until a portion of said movable member engages one of said stop members, whereupon said one stop member prevents further excursion of said movable member in said one rotational direction, said movable member then moving in the opposite rotational direction until a portion of said movable member engages the other of said stop members, whereupon said other of said stop members prevents further excursion of said movable member in said other rotational direction, said moving means then being energized by another of said discrete pulses of electrical energy to again move said movable member in said one rotational direction.

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