Method for determining a substitute distance between a location and a substitute impact point of a projectile
AssigneeSwarovski-Optik KG.
InventorAndreas Zimmermann
Life of this patent
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Abstract
A method for determining a substitute distance between a location and a substitute impact point of a projectile in a Horizontal Plane (3) common with the location, the method determining a Target Distance (6) between the location and a Target (2) arranged on a Sight Line (4), and the method determining an Elevation Angle (α, 5) formed by the Sight Line (4) with the Horizontal Plane (3), wherein an Equivalent Horizontal Distance (E, 17) is calculated as a substitute distance by correcting the Target Distance (6) with at least one Correction Coefficient (KK) dependent on the Elevation Angle (α, 5)
Claims15
A method for determining a substitute distance between a location and a substitute impact point of a projectile in a horizontal plane common with the location, the method including:
- determining a target distance between the location and a target arranged on a sight line, and
- determining an elevation angle formed by the sight line with the horizontal plane, wherein an equivalent horizontal distance is calculated as a substitute distance by correcting the target distance with at least one correction coefficient dependent on the elevation angle, wherein calculating the equivalent horizontal distance comprises the following steps:
- (i) calculating a substitute elevation angle from the determined elevation angle based on at least one elevation angle correction parameter and determining a correction coefficient corresponding to at least an approximation solution of a cosine of the substitute elevation angle;
- and/or
- (i′) calculating one value corresponding to at least an approximation solution of a cosine of the determined elevation angle or of the substitute elevation angle and determining the correction coefficient from the value corresponding at least to the approximation solution of the cosine of the determined elevation angle or of the substitute elevation angle and at least one correction value;
- and
- ii) using the correction coefficient determined in Step (i) and/or in Step (i!) to calculate the equivalent horizontal distance.
A device for determining a substitute distance between a location and a substitute impact point of a projectile in a horizontal plane common with the location and for aiming at a target, having a range finder for measuring a target distance and having an inclinometer for measuring an elevation angle between a sight line to the target and the horizontal plane, wherein the device comprises:
- a microprocessor arranged to calculate as a substitute distance an equivalent horizontal distance for an inclined shot with an elevation angle by correcting the target distance with a correction coefficient,
- wherein the microprocessor is arranged to use a correction coefficient corresponding to at least an approximation solution of a cosine of a substitute elevation angle, wherein the substitute elevation angle corresponds to an elevation angle corrected with an elevation angle correction parameter, and/or said microprocessor is arranged to use a correction coefficient corresponding to at least one approximation solution of a cosine of the elevation angle or the substitute elevation angle corrected with a correction value.
A long-range optical device comprising:
- having a device for determining a substitute distance to be taken into account in place of the target distance for aiming at the target with a firearm;
- and
- a display for rendering a value of the substitute distance for aiming to a shooter, characterized in that the device for determining an equivalent horizontal distance to be taken into account in place of the target distance is arranged as a device in accordance with claim.
Dependencies are inferred from the claim text.