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Laser line identifier

  • US 4,980,554 A
  • Filed: 03/31/1989
  • Issued: 12/25/1990
  • Est. Priority Date: 03/31/1989
  • Status: Expired due to Fees
First Claim
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1. A laser line identifier comprising:

  • a housing defining an aperture to admit laser radiation;

    focussing means mounted near said aperture to focus said laser radiation into a main beam of tightly collimated radiation;

    a plurality of extremely narrow pass band reflection type optical filters, each tuned to a different frequency component of said main beam and positioned to serially reflect said main beam to a terminal absorber;

    a detector located behind each of said filters in the path of radiation passed by said filter; and

    a primary alarm means coupled to each one of said detectors for generating a humanly perceptible signal, when said component strikes said one detector, and thereby identify the laser responsible for said component.

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