TELESCOPIC GUN SIGHT WITH TILTING OPTICAL ADJUSTMENT MECHANISM

• US 20160018188A1
• Filed: 07/17/2014
• Published: 01/21/2016
• Est. Priority Date: 07/07/2014
• Status: Active Grant

• Current Assignee: Lucida Research LLC
• Original Assignee: Lucida Research LLC
• Inventors: Jahromi, Omid S.
• Granted Patent: US 9,644,920 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F41G 1/38 Telescopic sights specially adapted for smallarms or ordnance telescopic sights in general G02B; Supports or mountings therefor
• CPC Class Codes: F41G 1/44 Spirit-level adjusting means, e.g. for correcting tilt; Means for indicating or correcting tilt or cant
• CPC Class Codes: G02B 23/02 involving prisms or mirrors G02B23/14 takes precedence
• CPC Class Codes: G02B 26/0891 forming an optical wedge
• CPC Class Codes: G02B 5/04 Prisms

Abstract

This invention teaches an optical method for adjusting the point of aim in telescopic gun sights. A pair of thin wedge prisms are placed in the optical path of a telescopic gun sight such that they can tilt around an axis perpendicular to the optical axis of the sight. The sight'"'"'s point of aim is adjusted by tilting the prisms.

Claims

1. A telescopic sight for designating a weapon'"'"'s point of aim when pointed at a target, comprising:

a. an objective lens for forming a first image of the target, said objective lens having a first focal plane and an optical axis,

b. an image-erecting means for converting said first image into an upright and laterally-correct second image, said image erecting means being positioned on the objective optical axis after said objective,

c. an eyepiece lens for converting said second image into a virtual third image of the target for convenient viewing by an operator, said eyepiece lens having a second focal plane, said eyepiece lens being positioned on the objective optical axis after said image erecting means,

d. a reticle for indicating the point of aim, said reticle being positioned coplanar with either said first focal plane or said second focal plane,

e. a beam-steering means, said beam-steering means being positioned in front of the objective on the objective optical axis, said beam-steering means comprising a first wedge prism, said first wedge prism having an apex and a base, said first wedge prism being tiltable around a first tilt axis, said first tilt axis being perpendicular to the objective optical axis,

whereby the operator can view and use said third image of the target for the purpose of aiming and adjust his point of aim by tilting said first wedge prism.

2. The telescopic sight of claim 1 wherein said beam-steering means further includes a second wedge prism, said second wedge prism having an apex and a base, said second wedge prism being positioned adjacent to said first wedge prism such that its apex faces the base of said first wedge prism, said second wedge prism being tiltable around a second tilt axis, said second tilt axis being parallel with said first tilt axis.

3. The telescopic sight of claim 1 wherein said first wedge prism is achromatic.

4. The telescopic sight of claim 2 wherein said first wedge prism and said second wedge prism are achromatic.

5. A telescopic sight for designating a weapon'"'"'s point of aim when pointed at a target, comprising:

a. an objective lens for forming a first image of the target, said objective lens having a first focal plane and an optical axis,

b. an image-erecting means for converting said first image into an upright and laterally-correct second image, said image erecting means being positioned on the objective optical axis after said objective,

c. an eyepiece lens for converting said second image into a virtual third image of the target for convenient viewing by an operator, said eyepiece lens having a second focal plane, said eyepiece lens being positioned on the objective optical axis after said image erecting means,

d. a reticle for indicating the point of aim, said reticle being positioned coplanar with either said first focal plane or said second focal plane,

e. a diverging lens and a converging lens, said diverging lens being positioned on the objective optical axis between said objective lens and said first focal plane, said converging lens being positioned on the objective optical axis between said diverging lens and said first focal plane, and

f. a beam-steering means, said beam-steering means being positioned on the objective optical axis between said diverging lens and said converging lens, said beam-steering means comprising a first wedge prism, said first wedge prism having an apex and a base, said first wedge prism being tiltable around a first tilt axis, said first tilt axis being perpendicular to the objective optical axis,

whereby the operator can view and use said third image of the target for the purpose of aiming and adjust his point of aim by adjusting the rotation of said first wedge prism and said second wedge prism.

6. The telescopic sight of claim 5 wherein said beam-steering means further includes a second wedge prism, said second wedge prism having an apex and a base, said second wedge prism being positioned adjacent to said first wedge prism such that its apex faces the base of said first wedge prism, said second wedge prism being tiltable around a second tilt axis, said second tilt axis being parallel with said first tilt axis.

7. The telescopic sight of claim 5 wherein said first wedge prism is achromatic.

8. The telescopic sight of claim 6 wherein said first wedge prism and said second wedge prism are achromatic.

9. A telescopic sight for designating a weapon'"'"'s point of aim when pointed at a target, comprising:

a. an objective lens for forming a first image of the target, said objective lens having a first focal plane and an optical axis,

b. an image-erecting means for converting said first image into an upright and laterally-correct second image, said image-erecting means being positioned on the objective optical axis after said objective, said image-erecting means comprising a first converging lens and a second converging lens,

c. an eyepiece lens for converting said second image into a virtual third image of the target for convenient viewing by an operator, said eyepiece lens having a second focal plane, said eyepiece lens being positioned on the objective optical axis after said image-erecting means,

d. a reticle for indicating the point of aim, said reticle being positioned coplanar with said second focal plane, and

e. a beam-steering means, said beam-steering means being positioned on the objective optical axis between said first converging lens and said second converging lens, said beam-steering means comprising a first wedge prism, said first wedge prism having an apex and a base, said first wedge prism being tiltable around a first tilt axis, said first tilt axis being perpendicular to the objective optical axis,

whereby the operator can view and use said third image of the target for the purpose of aiming and adjust his point of aim by tilting said first wedge prism.

10. The telescopic sight of claim 9 wherein said beam-steering means further includes a second wedge prism, said second wedge prism having an apex and a base, said second wedge prism being positioned adjacent to said first wedge prism such that its apex faces the base of said first wedge prism, said second wedge prism being tiltable around a second tilt axis, said second tilt axis being parallel with said first tilt axis.

11. The telescopic sight of claim 9 wherein said first wedge prism is achromatic.

12. The telescopic sight of claim 10 wherein said first wedge prism and said second wedge prism are achromatic.