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Crossed dot bar graph display for indication of position of a light beam, and an improved laser system with active laser cavity alignment using same

  • US 5,047,609 A
  • Filed: 01/05/1990
  • Issued: 09/10/1991
  • Est. Priority Date: 01/05/1990
  • Status: Expired due to Fees
First Claim
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1. An apparatus for displaying information concerning position of a light beam;

  • comprising;

    detector means, having a face with a reference point, for generating a first signal indicating position of a light beam incident on the face in a first dimension relative to the reference point, and a second signal indicating position of the light beam incident on the face in a second dimension relative to the reference point;

    display means, connected to the detector means, for displaying information concerning position of the beam in response to the first and second signals, includinga first set of indicating means, mounted in a linear array, each of the indicating means in the first set for indicating a respective position in the first dimension of the beam relative to the reference point, anda second set of indicating means, mounted in a linear array, each of the indicating means in the second set for indicating a respective position in the second dimension of the beam relative to the reference point, whereinthe first and second sets intersect in one member and the respective position indicated by the one member is the reference point in the first dimension or the second dimension.

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