Optical: systems and elements – Compound lens system – Telescope
Reexamination Certificate
1999-11-18
2001-06-26
Spyrou, Cassandra (Department: 2872)
Optical: systems and elements
Compound lens system
Telescope
C359S429000, C033S277000, C042S107000
Reexamination Certificate
active
06252706
ABSTRACT:
FIELD OF INVENTION
The present invention relates to a telescope sight for an individual weapon enabling very high-precision firing for hunting, target shooting and anti-personnel fire
BACKGROUND OF INVENTION
Modern shooting techniques enable elite marksmen equipped with modern 12.7 m/m calibre weapons, for example, to shoot from very long distances.
Conventional sights have become limited for this type of shooting because at distances of from 1,000 to 1,500 meters, the evaluation error of the distance and interpretation of the drop of the bullet causes aiming errors. It has become indispensable to use an electronic and computer-assisted system.
For several years, sights have been available which use the displacement of lines forming the sight reticle or the displacement of pixels forming the reticle on a colour or black and white liquid crystal screen (LCD).
However, the fact of displacing the point of aim relative to the central axis of sight of the rifle sight causes aiming errors due to distortion of the view through the sight since, outside the central zone of the lens, the rest of the lens is subjected to vignetting, namely blurring and visual distortion. In the optical field, this phenomenon is known to increase the greater the distance between marksman and target.
Furthermore, any marksman using a rifle with a sight is aware that the fact of moving his eye relative to the central axis of sight of the rifle sight will cause a black halo to appear, blocking the line of vision. This is all the more visible, the smaller the diameter of the individual lenses forming the objective.
For a target such as a tank or light vehicle, this does not have a decisive effect since, because of the large size of the target, an error of 20 or 30 centimeters on impact will not prevent the target from being hit, but when it comes to anti-personnel fire, hunting or target shooting, it is vital, because of the small size of the target, to have a perfect, non-distorted view, i.e. irrespective of the distance of the target and the correction applied to the aim, the line of sight must be centred relative to the axis of the rifle sight, if errors due to vignetting of the lens are to be avoided.
SUMMARY OF THE INVENTION
The objective of the invention is to remedy the disadvantages outlined above and to do so by simple, effective and inexpensive means.
To this end, the invention proposes a telescope rifle sight for an individual weapon, essentially characterised in that it is fitted with at least one step micro-motor designed to vary the angle of the sight relative to the axis of the weapon and the initial point of aim, thereby adequately varying the whole sight assembly and thus varying the original position of the sight reticle from the original point of aim to the required point of aim.
Accordingly, it is not the lines forming the sight reticle which move but the sight assembly, relative to its original axis, in a given manner, assisted by one or two step micro-motors so as to bring the point of aim of the reticle to the required aiming mark depending on the distance and the drop of the bullet at this distance. The marksman will barely notice the displacement of the sight, having a perfect view of the target. He will therefore keep the reticle constantly sighted on the target. Furthermore, a marksman who is used to conventional rifle sights will not be disoriented by the position of the reticle.
The telescope rifle sight proposed by the present invention may optionally also incorporate one or more of the following features:
a laser beam rangefinder which transmits the distance marksman/target to a computer which holds in memory the drop of the bullet at this distance;
a first step micro-motor is positioned so as to allow the sight to be pivoted about a horizontal axis in order to correct the aim up or down relative to the point zero, depending on the distance and the drop of the bullet;
a second step micro-motor is positioned so as to allow the sight to be pivoted about a vertical axis in order to correct the aim in terms of bearing to the right and left relative to the point zero depending on the direction of the wind and/or the displacement of the target;
the sight incorporates batteries which may or may not be rechargeable and solar cells designed to recharge them; and
the sight incorporates a zoom camera, a LCD screen which can be pivoted about its attachment, the screen displaying the sight reticle and various pieces of information about firing, a computer, an invisible laser beam rangefinder, a visible laser beam pointer, an audio-video recording system, an audio-video transmitter-receiver, solar cells, power batteries which may or may not be electrically rechargeable, three external sockets, a frame enabling all the components of the sight to be mounted, the unit as a whole being attached to the weapon, and a protective cap for the unit.
REFERENCES:
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patent: 4317304 (1982-03-01), Bass
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patent: 5026158 (1991-06-01), Golubic
patent: 5375072 (1994-12-01), Cohen
patent: 5740037 (1998-04-01), McCann et al.
patent: 2907373 (1980-08-01), None
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patent: 4218118 (1993-12-01), None
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patent: 2474679 (1981-07-01), None
Guary Gabriel
Piper Marbury Rudnick & Wolfe
Robinson Mark A.
Spyrou Cassandra
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