Sight-tracking viewing device
AssigneeAerospatiale Societe Nationale Industrielle
InventorsJean-Pierre Merle, Martine Lassalle, Franck Bernoux, Maurice Adda
Life of this patent
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Abstract
A device intended to be associated, on the one hand, with a viewfinder, on the eyepiece side thereof, and, on the other hand, with a calculating mechanism, to form a system making it possible to determine at every instant that portion of a field sighted by the eye of an observer through the viewfinder. The device is arranged on the image side of the eyepiece of the viewfinder and includes a splitter element associated with a thick optical plate whose parallel faces are orthogonal to the optical axis of the finder.
Claims8
A device for use with a viewfinder, on the eyepiece side thereof, and, with a calculating means, to form a system to determine at every instant that portion of a field sighted by the eye of an observer through said viewfinder, said device comprising:
- an optical splitter element arranged on the optical axis of said viewfinder;
- a light source sending a light beam to said eye, by way of said optical splitter element, in order to form a reflection;
- first picture-taking means observing said reflection by way of said optical splitter element and generating first electrical signals representative of the orientation of the optical axis of said eye, said first signals being required to be sent to said calculating means;
- and
- second picture-taking means observing said field by way of said optical splitter element and generating second electrical signals representative of said field, said second signals likewise being required to be sent to said calculating means,
- wherein said device is arranged on the image side of the eyepiece of said viewfinder and includes a thick optical plate whose parallel faces are orthogonal to said optical axis of said finder, said thick optical plate having a shape at least approximately of a cube.
Dependencies are inferred from the claim text.