US 2021/0164758 A1Published application

Riflescope with Optical Aiming Corrector

AssigneeAimpoint AB

InventorOmid S Jahromi

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Abstract

This invention discloses a riflescope wherein the point of aim is adjusted by a pair of partially-rotating wedge prisms. The prisms are positioned in front of the objective lens of the riflescope. The deviation axes of the prisms are oriented perpendicular to each other such that one deviates the light beam in the horizontal direction and the other in the vertical direction. It is shown, using the geometric properties of a tangent to a circle, that rotating each prism by a small amount can produce an approximately linear shift in the point of aim of the riflescope. The riflescope introduced in this invention has no laterally-moving parts, no turrets and no off-axis optical components. Therefore, it provides a very robust and reliable point of aim. Additionally, the riflescope has a streamlined body which is aesthetically pleasing and easier to mount on the long receiver of magnum hunting rifles.

Claims16

Dependent claims

A riflescope, comprising:

a. a housing, said housing having a front end, a rear end and a middle section,
b. an objective lens that forms a first image of a target, said objective lens being mounted inside said housing at a front end of said housing, said objective lens having an optical axis and a focal plane;
c. an erector prism that converts said first image of the target into an upright second image of the target, said erector prism being mounted inside said. housing after said objective lens;
d. an eyepiece lens that converts said second image of the target into a virtual image of the target viewable by a shooter, said eyepiece lens being mounted after said erector prism, said eyepiece lens being mounted inside said housing at a rear end of said housing, said eyepiece lens having a focal plane;
e. a reticle that designates a point of , said reticle being positioned after said objective lens and before said eyepiece lens, an image being superimposed on the virtual image of the target;
f. a first wedge prism that deviates the direction of light entering said objective lens, said first wedge prism being rotatably mounted inside said housing at a front end of said housing, said first wedge prism being positioned before said objective lens, said first wedge prism having a deviation power α1, said first wedge prism having a deviation axis that forms a variable angle θ1 with respect to the horizontal axis, said variable angle θ1 being
f1. adjustable by a user,
f2. limited to a first predetermined maximum value less than 45 degrees;
g. a second wedge prism that deviates the direction of light entering said objective lens, said second wedge prism being rotatably mounted inside said housing at a front end of said housing, said second wedge prism being positioned before said objective lens, said second wedge prism having a deviation power α2, said second wedge prism having a deviation axis that forms a variable angle θ2 with respect to the vertical axis, said variable angle θ2 being
g1. adjustable by a user,
g2. limited to a second predetermined maximum value less than 45 degrees;
whereby the point of aim can be corrected to correspond to a point of impact of a rifle associated with the riflescope.

9 more elements

A riflescope, comprising:

a. a housing, said housing having a front end, a rear end and a middle section,
b. an objective lens that forms a first image of a target, said objective lens being mounted inside said housing at a front end of said housing, said objective lens having an optical axis and a focal plane;
c. an erector lens group that converts said first image of the target into an upright second image of the target, said erector lens group being mounted inside said housing after said objective lens;
d. an eyepiece lens that converts said second image of the target into a virtual image of the target viewable by a shooter, said eyepiece lens being mounted after said erector prism, said eyepiece lens being mounted inside said housing at a rear end of said housing, said eyepiece lens having a focal plane;
e. a reticle that designates a point of aim, said reticle being positioned coplanar with said first image of the target or said second image of the target, an image being superimposed on the virtual image of the target;
f. a first wedge prism that deviates the direction of light entering said objective lens, said first wedge prism being rotatably mounted inside said housing at a front end of said housing, said first wedge prism being positioned before said objective lens, said first wedge prism having a deviation power α1, said first wedge prism having a deviation axis that forms a variable angle θ1 with respect to the horizontal axis, said variable angle θ1 being
f1. adjustable by a user,
f2. limited to a first predetermined maximum value less than 45 degrees;
g. a second wedge prism that deviates the direction of light entering said objective lens, said second wedge prism being rotatably mounted inside said housing at a front end of said housing, said second wedge prism being positioned before said objective lens, said second wedge prism having a deviation power α2, said second wedge prism having a deviation axis that forms a variable angle θ2 with respect to the vertical axis, said variable angle θ2 being
g1. adjustable by a user,
g2. limited to a second predetermined maximum value less than 45 degrees;
whereby the point of aim can be corrected to correspond to a point of impact of a rifle associated with the riflescope.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/699,673Filed 1 Dec 2019
Published: 3 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F41G 1/033
Foresights: adjustable
F41G 1/38
Sighting devices: telescopic sights specially adapted for smallarms or ordnance ; Supports or mountings therefor
F41G 1/473
For particular applications: for lead-indicating or range-finding, e.g. for use with rifles or shotguns
G02B 5/04
Optical elements other than lenses: prisms

Family

US 11,692,792 B2Related patent
US 2021/0164758 A1This patent

From the US filing history. Foreign family members aren’t listed.

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