Modular day/night weapon aiming system

• US 5,272,514 A
• Filed: 12/06/1991
• Issued: 12/21/1993
• Est. Priority Date: 12/06/1991
• Status: Expired due to Term

• Current Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Litton Systems Incorporated
• Inventors: Dor, Amotz
• Primary Examiner(s): Evans, F. L.
• Application Number:
  US07/804,111
• Time in Patent Office: 746 Days
• Field of Search: 356/251, 356/252, 42/100, 42/101, 42/103, 33/241-243, 250/213 VT
• US Class Current: 356/251
• CPC Class Codes: F41G 1/32 Night sights, e.g. luminescent optical aspects of sighting devices G02B23/00, G02B27/00
• CPC Class Codes: G02B 23/125 head-mounted

Abstract

The improved day/night weapon sight comprises a red dot aiming portion having a light emitting diode, a combining mirror, and an apparatus for mounting the LED and the mirror on a weapon to produce a virtual image of the LED at an infinite distance in alignment with the bore sight of the weapon, and a removable night vision portion having an objective lens, an eyepiece, and an image intensification tube for intensifying a received image intermediate the objective lens and the eyepiece, wherein the virtual image is visible to the operator at night through the eyepiece, and the night vision portion is removed for use of the red dot aiming portion during the day.

Claims

1. A modular weapon aiming system operable during day and night conditions for a weapon having a barrel, the system comprising:

an aiming portion having a light source, a combining mirror, and means for mounting said aiming portion to said weapon to produce a virtual image of said light source at an infinite distance in substantial linear alignment with said barrel, said virtual image providing a reticle; and

a removable night vision portion for intensifying a received image and means for removably mounting said night vision portion to said weapon in substantial linear alignment behind said aiming portion to provide said reticle visible through said night vision portion.

2. The aiming system of claim 1, wherein said light source is a red light emitting diode (LED).

3. The aiming system of claim 2, wherein said mirror is formed of a substantially transparent material which reflects only red light frequencies and a has a generally concave surface facing in the rearward direction relative said weapon.

4. The aiming system of claim 3, wherein said aiming portion further comprises a housing having a mounting ring holding said mirror and a shroud surrounding the edges of said mirror to shield said mirror from undesired lateral observation.

5. The aiming system of claim 4, wherein said night vision portion comprises an objective lens, an eyepiece, and an image intensification means for intensifying a received image intermediate said objective lens and said eyepiece.

6. The aiming system of claim 5, wherein the diameter of said mirror is smaller than the diameter of said objective lens.

7. The aiming system of claim 6, wherein said aiming portion produces an image of said light source visible through said eyepiece in substantial linear alignment with said barrel when said night vision portion is mounted by use of said mounting means.

8. The aiming system of claim 7, wherein said night vision portion is a monocular.

9. The aiming system of claim 7, wherein said night vision portion is removed from said weapon during day usage.

10. The aiming system of claim 7, wherein said objective lens provides three times magnification.

11. A weapon aiming system operable during day and night conditions for a weapon having barrel, the system comprising:

an aiming means for producing in a viewing field a virtual image of a light source at an infinite distance in substantial linear alignment with said barrel for providing a reticle for the operator of said weapon, said aiming means comprising a single combining mirror having a generally concave surface facing said light source to define said viewing field in a rearward direction relative said weapon;

a removable night vision means for intensifying a received image and having a field of view which includes said viewing field provided by said combining mirror; and

whereby alignment of said night vision means to said weapon is unnecessary.

12. The aiming system of claim 11, wherein said night vision means further comprises an eyepiece, an objective lens, an image intensification tube, and a housing.

13. A weapon aiming system operable during day and night conditions for a weapon having a barrel, said system comprising:

an aiming means for producing in a viewing field a virtual image of a light source at an infinite distance in substantial linear alignment with said barrel capable of providing a reticle for the operator of said weapon, said aiming means comprising a single combining mirror having a generally concave surface facing said light source to define said viewing field in a rearward direction relative said weapon, and means for mounting said aiming means to said weapon; and

a night vision means having a field of view for intensifying a received image and at least partially including said viewing field for providing said reticle within the field of view of said night vision means.

14. The aiming system of claim 13, wherein said night vision means is detached from both said weapon and said aiming means.

15. The aiming system of claim 14, wherein said night vision means further comprises an eyepiece, an objective lens, an image intensification means for intensifying a received image intermediate said eyepiece and said objective lens, and a housing affixed to said night vision means.

16. The aiming system of claim 15, wherein said light source is a red light emitting diode (LED).

17. The aiming system of claim 16 wherein said combining mirror is formed of a substantially transparent material which reflects only red light frequencies.

18. The aiming system of claim 17, wherein said aiming means produces an image of said light source visible through said eyepiece in substantial linear alignment with said barrel when said detached night vision means is positioned within the field of view of said aiming means.

19. The aiming system of claim 18, wherein said detached night vision means is mounted to a face mask worn by said operator.

20. The aiming system of claim 18, wherein said detached night vision means is mounted to a helmet worn by said operator.

21. A weapon aiming system operable during day and night conditions for a weapon having a barrel, the system comprising:

an aiming means for producing a virtual image of a light source at an infinite distance in substantial linear alignment with said barrel for providing a reticle for the operator of said weapon;

a removable night vision means for intensifying a received image and having a field of view which includes the field of view of said aiming means, said night vision means further comprising an eyepiece, an objective lens, an image intensification tube, and a housing; and

means for mounting said aiming means and said night vision means on said weapon in substantial linear alignment with said barrel and with said night vision means behind said aiming means relative said weapon to provide said reticle visible to said operator through said eyepiece;

whereby alignment of said night vision means to said weapon is unnecessary.

22. The aiming means of claim 21, wherein said light source is a red light emitting diode (LED).

23. The aiming system of claim 22, wherein said aiming means further comprises a combining mirror formed of a substantially transparent material which reflects only red light frequencies, and has a generally concave surface facing said light source in the rearward direction relative said weapon.

24. The aiming system of claim 23, wherein the mounting means further comprises a mounting plate provided on said housing and a carriage affixed to said weapon and configured to receive said mounting plate in locking engagement.

25. The aiming system of claim 24, wherein said aiming means produces an image of said light source visible through said eyepiece in substantial linear alignment with said barrel when said night vision portion is mounted by use of said mounting means.

26. The aiming system of claim 25, wherein said night vision means is removed from said weapon during day usage.

27. The aiming system of claim 23, wherein the diameter of said mirror is smaller than the diameter of said objective lens.

28. The aiming of claim 23, wherein said objective lens provides three times magnification.

29. A weapon aiming system operable during day and night conditions for a weapon having a barrel, said system comprising:

an aiming means for producing a virtual image of a light source at an infinite distance in substantial linear alignment with said barrel capable of providing a reticle for the operator of said weapon, and means for mounting said aiming means to said weapon;

a night vision means for intensifying a received image and for providing said reticle within the field of view of said night vision means; and

means for mounting said night vision means on said weapon in substantial linear alignment with said barrel and behind said aiming means relative said weapon.

30. A weapon aiming system operable during day and night conditions for a weapon having a barrel, said system comprising:

a aiming means for producing an image of a light source in substantial linear alignment with said barrel capable of providing a reticle for the operator of said weapon, said aiming means comprising a single reflecting element having a generally concave surface facing said light source in a rearward direction relative said weapon; and

a night vision means for intensifying a received image and for providing said reticle within a field of view of said night vision means, said night vision means being mounted to the head of the operator and detached from said aiming means.

31. A weapon aiming system operable during day and night conditions for a weapon having a barrel, said system comprising:

a means for projecting an image of a reticle into an input of a night vision receiver, said projecting means comprising a single reflecting element having a generally concave surface facing in a rearward direction relative said weapon; and

said night vision receiver being mounted to the head of the operator and detached from said projecting means.

32. A modular weapon aiming system operable during day and night conditions for a weapon, the system comprising:

an aiming means for projecting an image of a reticle for said weapon, and means for mounting said aiming means to said weapon; and

a night vision means for intensifying a received image including an objective lens, and means for removably mounting said night vision means to said weapon to provide said reticle image visible through said night vision means.

33. The aiming system of claim 32, wherein said aiming means comprises a light source and a single combining mirror, said reticle image being illuminated by said light source;

wherein said combining mirror projects a virtual image of said reticle image onto said objective lens.

34. The aiming system of claim 33, wherein said mirror is formed of substantially transparent material which reflects only light frequencies of said light source.

35. The aiming system of 34, wherein said light source is of a predetermined color, and said mirror transmits light of other colors.

36. The aiming system of claim 35, wherein at least a portion of the light from said received image reaching said objective lens passes through said mirror.

37. An aiming system for a weapon operable during night and day, and capable of producing an intensified image of a scene under night conditions, comprising:

a night vision portion capable of producing said intensified image of said scene, said night vision portion having an objective lens;

an aiming means for projecting an image of a reticle for said weapon, said aiming means including a light source of a predetermined color, and a combining mirror formed of a transparent material having a concave surface which reflects light of said predetermined color and transmits light of other colors, said concave surface capable of defining and projecting in a viewing field rearwardly of said weapon a virtual image of said reticle image into said objective lens;

means for mounting said aiming means to said weapon; and

wherein said aiming means and said night vision portion are so disposed that at least a portion of light from said scene is transmitted through said concave combining mirror in said viewing field and into said objective lens.

38. The aiming system of claim 37, wherein said night vision portion is a viewer worn by a user of said weapon.

39. The aiming system of claim 38, wherein said viewer is a monocular.

40. The aiming system of claim 38, wherein said viewer is mounted to the head of said user.

41. The aiming system of claim 38, wherein said viewer is mounted to a helmet worn by said user.

42. A weapon aiming system operable during day and night conditions for a weapon having a barrel, said system comprising:

a means for projecting an image of a reticle into an input of a night vision receiver, said projecting means comprising a single reflecting element having a generally concave surface facing in a rearward direction relative said weapon, and said night vision receiver being detached from said projecting means.