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TARGET MEASUREMENT SYSTEM FOR PRECISE PROJECTILE LOCATION

  • US 3,727,069 A
  • Filed: 07/21/1971
  • Issued: 04/10/1973
  • Est. Priority Date: 07/21/1971
  • Status: Expired due to Term
First Claim
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1. A target system for locating the position of a projectile with respect to predetermined points in a measuring direction said target system comprising:

  • a plurality of light sources of parallel beams of light, each said light beam having a predetermined width in a measuring direction, the measuring direction being generally perpendicular to the projectile path;

    a plurality of light receiving means positioned in the direction of said measuring axis and spaced apart from said plurality of light sources for defining a target area, each light receiving means in said plurality of light receiving means including a plurality of light receptors for receiving light from a corresponding one of said plurality of light sources, each said light receptor having a predetermined position along the measuring direction of said parallel light rays, each said light receptor producing a signal having a first state in response to impinging light from a corresponding light source and a second state in response to the interruption of light from a corresponding light source, each said light receptor receiving only a predetermined portion of the width of the light rays from a corresponding light source for producing a discrete output signal in response to the interruption of its predetermined portion of the light rays from a corresponding light source by a projectile; and

    a plurality of circuit means for expressing the location and diameter of a projectile interrupting light rays to said plurality of light receiving means in a predetermined number system, said plurality of circuit means less in number than the total number of said plurality of light receptors, each said circuit means corresponding to a character in the predetermined number system for producing unambiguous output signals, each said circuit means responsive to signals from predetermined light receptors according to a predetermined coding pattern.

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