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OPTICAL LENS DOCKING SYSTEM

  • US 3,729,262 A
  • Filed: 07/20/1971
  • Issued: 04/24/1973
  • Est. Priority Date: 07/20/1971
  • Status: Expired due to Term
First Claim
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1. An optical device for providing visual alignment and guidance to enable an observer to pursue a prescribed path of travel and to stop at a predetermined point along said path comprising, a center line module having at least first and second light sources and a first lens system positioned with respect to said light sources to form respective images thereof, means within said center line module for separating the images of said light sources as seen by said observer, said first light source being positioned a first distance from said first lens system whereby the image formed thereof as viewed by said observer appears to remain stationary and serves as a datum bar, said second light source being positioned at a second distance from said first lens system whereby the image formed thereof serves as a center line bar which when viewed by said observer appears to be displaced with respect to said datum bar in proportion to the azimuthal deviation of said observer from said path of travel, the alignment of said center line bar with said datum bar by said observer being indicative of travel along said prescribed path, a stop bar module having at least a single light source and a second lens system positioned with respect thereto such that the image formed by said second lens system as seen by said observer serves as a stop bar, a stop cue positioned in predetermined relationship to said stop bar module, said stop bar appearing to said observer to be displaced from alignment with said stop cue in proportion to the observer'"'"''"'"'s distance from said predetermined stop point, the concurrent alignments by said observer of said center line bar with said datum bar in said center line module and said stop cue with said stop bar in said stop bar module being indicative of the attainment by said observer of said predetermined stop point along said prescribed path of travel.

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