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Improved “moving red dot” sighting device, including a fixed light source (4) and a reflecting element (17), wherein the light source (4) produces a collimated light beam (5) which is projected onto the reflecting element (17) so as to obtain a red dot or reticle which is visible to the shooter than

Improved “moving red dot” sighting device, including a fixed light source (4) and a reflecting element (17), wherein the light source (4) produces a collimated light beam (5) which is projected onto the reflecting element (17) so as to obtain a red dot or reticle which is visible to the shooter thanks to the reflection on the reflecting element (17), and whereby the beam (5) is projected onto the reflecting element (17) by means of a rotating mirror (9) whose inclination angle (B) in relation to the light beam (5) can be adjusted.

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1. A “moving red dot” firearm sighting device, comprising a single, fixed, quasi punctual light source, a collimator comprising a convergent lens having a focal point, the light source located at the focal point, a semi-transparent beamsplitter, and a mirror located between the collimator and the be

1. A “moving red dot” firearm sighting device, comprising a single, fixed, quasi punctual light source, a collimator comprising a convergent lens having a focal point, the light source located at the focal point, a semi-transparent beamsplitter, and a mirror located between the collimator and the beamsplitter, said mirror being rotatable about an inclination adjusting axis, wherein the light source and collimator project a collimated light beam along an optical axis which is projected onto the beamsplitter via the rotatable mirror so as to produce a red dot or reticle which is visible to a shooter due to the reflection of the collimated light beam on the beamsplitter, and wherein an inclination angle of the optical axis of the light beam projected onto the beamsplitter is adjustable by rotation of the mirror about the inclination adjusting axis. 2. The sighting device according to claim 1, wherein the sighting device is intended for use with a firearm shooting a given type of ammunition along a ballistic trajectory, comprising an adjusting device arranged to enable adjustment of the inclination angle of the mirror as a function of the distance of a target and of the given type of ammunition. 3. The sighting device according to claim 2, wherein the adjusting device includes a scale representing the distance of the target. 4. The sighting device according to claim 3, wherein the adjusting device includes several scales for different given types of ammunition. 5. The sighting device according to claim 2, wherein the adjusting device comprises a motor arranged to adjust the inclination angle of the mirror and a ballistic calculator controlling said motor enabling calculating and setting a required inclination angle of the mirror as a function of the distance of the target and/or of the given type of ammunition used. 6. The sighting device according to claim 5, wherein the ballistic calculator includes a range finder which is arranged to automatically communicate a distance of the target to the range finder when a calculation of the inclination angle is requested by a shooter. 7. The sighting device according to claim 1, wherein the diameter of the collimated light beam is about 15 mm or less. 8. The sighting device according to claim 1, said light source comprising an LED disposed behind a mask located at the focal point of the collimator lens, said mask having a hole located along the optical axis through which light from the LED projects to the collimator lens. 9. The sighting device according to claim 1, comprising a fore-sight placed at a point of convergence of axes of beams reflected on the beamsplitter. 10. The sighting device according to claim 1, comprising a lateral diffusion strip at one or both sides of the reflecting element onto which a luminous reference is projected parallel to the optical axis of the collimated beam. 11. The sighting device according to claim 10, wherein the luminous reference is formed by the collimated beam itself. 12. The sighting device according to claim 10, wherein the luminous reference comprises an optical condensation of the exterior parts of the collimated beam. 13. The sighting device according to claim 10, wherein the luminous reference is formed by a beam of a laser pointer having an axis extending mainly parallel to the optical axis of the collimated beam. 14. The sighting device according to claim 13, wherein the beam of the laser pointer is laterally expanded by an appropriate optical device so as to form a line which defines the luminous reference. 15. The sighting device according to claim 2, wherein the reticle comprises several marks which correspond, each for a determined distance of the target, to the required sighting correction so as to take into account the deviation of the trajectory of the given type of ammunition due to Magnus effect. 16. The sighting device according to claim 2, wherein the position of the reticle is automatically movable in a lateral direction by a device controllable by a ballistic calculator as a function of the given type of ammunition used and the distance of the target, so as to correct the deviation of the trajectory of the ammunition due to Magnus effect. 17. The sighting device according to claim 5, wherein the reticle comprises at least a horizontal reference and the ballistic calculator includes an inclinometer arranged to measure a vertical deflection of the firearm, wherein the calculator is arranged to adjust the inclination of the reference or of the reticle relative to the optical axis in proportion to the vertical deflection of the firearm, such that the reference or reticle will be better perceived by a shooter of the firearm while aiming. 18. The sighting device according to claim 1, wherein the sighting device includes a case supporting the light source, collimator, mirror and beamsplitter, the reflecting element extending upwardly relative to the case during use, and wherein the reflecting element is collapsible downwardly relative to the case to reduce of the height of the sighting device. 19. A “moving red dot” firearm sighting device, comprising a single, fixed, quasi punctual light source, a collimator comprising a convergent lens having a focal point, the light source located at the focal point, a reflecting element comprising the hypotenuse of a right angle prism, and a mirror located between the collimator and the hypotenuse of the right angle prism, said mirror being rotatable about an inclination adjusting axis, wherein the light source and collimator project a collimated light beam along an optical axis which is projected onto the hypotenuse of the right angle prism via the rotatable mirror so as to produce a red dot reticle which is visible to a shooter due to the reflection of the collimated light beam on the hypotenuse of the right angle prism, and wherein an inclination angle of the optical axis of the light beam projected onto the hypotenuse of the right angle prism is adjustable by rotation of the mirror about the inclination adjusting axis. 20. The sighting system according to claim 19, wherein the prism is a beamsplitter cube comprising two right angle prisms joined together along their respective hypotenuses.