×

Device for photogrammetric evaluation of stereo-couples of photographs

  • US 4,127,779 A
  • Filed: 06/17/1977
  • Issued: 11/28/1978
  • Est. Priority Date: 07/23/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. A device for photogrammetric evaluation of stereo-couples of serial photographs, comprisinga stereo-couple of two photographs,displacement means for displacing at least one of said two photographs,a first and a second cathode ray tube,a first and a second photo-detectorsaid first cathode ray tube emitting a first light beam, said first photodetecting being for detecting said first light beam,one of said photographs being arranged in said first light beam,said second cathode ray tube being for emitting and said second photodetector being for detecting a second light beam,the other of said photographs being arrranged in said second light beam,a first group of four correlator signal channels,a second group of four correlator signal channels,said first group being electrically connected to the output of said first photodetector,said second group being connected to the output of said second photodetector,the individual correlator signal channels in said first and said second group having different frequency ranges and different delay times,the individual signal channels from said first group and the individual channels from said second group are connected in pairs,said pairs having identical frequency ranges and delay times,eight gate circuits,said gate circuits having first inputs,second inputs and an output each,said first inputs being connected to said individual signal channels,said second inputs connecting those gate circuits being in turn connected via said first inputs to said pairs of signal channels, thus forming pairs of gate circuits,a pulse switch having one input and four outputs,a clock-pulse generator being connected to said one input,said four outputs being respectively connected to said four pairs of gate circuits,a discriminator having two inputs and one output,the two discriminator inputs being connected via said four pairs of gate circuits and via said first group and said second group of signal channels to said first and second photodetector, respectively,a displacement meansthe discriminator output being connected to said displacement means,said displacement means being provided with means for displacing at least one of said two photographs.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×