Photogrammetric plotting apparatus
AssigneeEngins Matra
InventorNoel Malinge
Life of this patent
Estimating the term…
Abstract
A photogrammetric plotting apparatus comprises means to move two stereographic plates in their plane with respect to two respective optical systems which are arranged to project onto a single screen images of reference marks indicating the trace of the line of sight of each optical system on the respective plate. Different polarizers are disposed on the lines of sight of the optical systems so that an operator looking at the said screen through two analyzers corresponding to the polarizers sees the images of the region of one plate and its respective reference mark with one eye and the image of the corresponding region of the other plate and its respective reference mark with the other eye.
Claims14
A photogrammetric plotting apparatus comprising:
- two stereographic plates;
- two optical systems having respective optical axes and each for forming an image of a region of a respective one of the two stereographic plates;
- means for moving the stereographic plates in their plane with respect to said optical systems to bring corresponding regions of said plates onto the optical axes of said optical systems,
- means providing a reference mark indicating the trace of the optical axis of each said optical system on the respective plate, each said reference mark being imaged by the respective optical system;
- and
- observation means for observing the images formed by said optical systems;
- in which apparatus the improvement comprises:
- two different polarisers, each disposed on the optical axis of a respective one of said optical systems so that the images of the region of the respective plate and the respective reference mark are formed by the same polarised light;
- said observation means including a single screen, and said optical system being arranged to project the images of the corresponding regions of the plates and the images of the associated reference marks on said screen, whereby an operator looking at said screen through two analyzers corresponding to said polarisers sees the images of the region of one plate and its respective reference mark with one eye only and sees the images of the corresponding region of the other plate and its respective reference mark with the other eye only.
Dependencies are inferred from the claim text.