Night vision system and mounting assembly

• US 5,331,459 A
• Filed: 12/10/1991
• Issued: 07/19/1994
• Est. Priority Date: 12/10/1991
• Status: Expired due to Term

• Current Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Litton Systems Incorporated (Northrop Grumman Corporation)
• Inventors: Dor, Amotz
• Primary Examiner(s): Lerner, Martin
• Application Number:
  US07/805,187
• Time in Patent Office: 952 Days
• Field of Search: 359/409, 359/410, 359/411, 359/407, 359/630, 359/413
• US Class Current: 359/409
• CPC Class Codes: G02B 23/12 with means for image conversion or intensification
• CPC Class Codes: G02B 23/125 head-mounted

Abstract

A night vision system usable as either a helmet mounted or face mask mounted monocular, or as a pocketscope, comprising an optical portion having an objective lens, an eyepiece, and an image intensification apparatus for intensifying a received image intermediate the objective lens and the eyepiece, a control housing affixed to the optical portion and having internal circuitry for powering the optical portion, and an apparatus for selectively mounting the monocular in an operational position adjacent to a desired one of an operator'"'"'s eye and being rapidly switchable between the eyes.

Claims

1. A night vision monocular, comprising:

an optical portion having an objective lens, an eyepiece and an image intensification means for intensifying a received image intermediate said objective lens and said eyepiece;

a control housing affixed to said optical portion and having internal circuitry for powering said optical portion; and

a means for selectively mounting said monocular in either of two operational positions corresponding to a desired one of an operator'"'"'s eyes and being rapidly switchable between said operational positions, said selective mounting means further comprising;

a first dovetail mounting plate affixed to a first surface of said control housing, and a second dovetail mounting plate affixed to a second surface of said control housing;

a carriage configured to receive a selected one of said dovetail plates and means for securing said selected dovetail plate within said carriage; and

a frame conforming to the shape of the visor of a helmet worn by said operator, and carrying said carriage in a central portion of said frame, and means for attaching said frame to '"'"'said helmet, said carriage being selectively adjustable relative said frame to vary the distance between the operator and said eyepiece.

2. The night vision monocular of claim 1, wherein said attaching means further comprises:

a plurality of adjustable cushions frictionally mounted on said frame, said cushions each having a sleeve portion gripping said frame, a retaining portion pivoting from said sleeve portion and engaging said visor, and a pin securing said retaining portion to said sleeve portion;

an adjustable strap having a left and right portion attaching to said frame at left and right attachment points respectively, and a rear portion joining to said left and right portions relative to the top of said helmet;

a hook provided at the end of said rear portion to engage the back of said helmet.

3. The night vision monocular of claim 2, wherein:

said sleeve portions are generally C-shaped, having an internal surface which conforms to and frictionally engages said frame, an exterior surface having a substantially flat portion and a pair of half-moon shaped posts protruding outward from said exterior surface on opposite sides of said flat portion;

said retaining portions comprise a pair of retaining walls joined by a substantially flat base and a pair of semicircular tabs extending below said base substantially parallel to said walls, said tabs each having an opening in the center and a notch at the bottom, said posts engaging said openings enabling said retaining portions to pivot relative said sleeve portions with pivotal travel limited by contact between said base and said flat portion of said sleeve portions; and

said pin is generally C-shaped, having ends which extend outwardly from the part of said openings left unoccupied by said half-moon posts, traveling downward along said tabs to engage said notches.

4. The night vision monocular of claim 3, wherein said frame comprises a substantially hollow aluminum tube having sealed ends and a black oxide finish.

5. The night vision monocular of claim 4, wherein said left and right attachment points comprise elongated wire loops having ends folded inward and an intermediate portion welded to said frame, said left and right straps having ends which wrap around said frame and wire loop combinations with said folded ends enveloping the sides of said straps to preclude lateral movement of said straps relative said frame.

6. The night vision monocular of claim 5, wherein said hook is substantially J-shaped having an elongated back wall, a slot spanning said back wall, a hook wall having a beveled edge, and a base joining said back wall and said hook wall, said rear portion of said strap feeding through said slot and fastening to itself along the length of said rear portion.

7. The night vision monocular of claim 6, wherein said frame has a pair of parallel support bars extending outwardly relative the operator from the center portion of said frame, each of said bars having a sawtooth track disposed thereon;

whereby, said carriage travels on said support bars and cooperates with said track to remain secured in a desired position.

8. A night vision system, comprising:

an optical portion for receiving and intensifying an image;

a means for mounting said optical portion to a helmet in either of two fixed operational positions corresponding to a desired one of an operator'"'"'s eyes and being rapidly switchable between said operational positions;

further comprising a control housing affixed to said optical portion and having an internal battery for powering said optical portion;

wherein said mounting means comprises;

a first dovetail mounting plate affixed to a first surface of said control housing, and a second dovetail mounting plate affixed to a second surface of said control housing; and

a carriage configured to receive as elected one of said dovetail plates and means for securing said selected dovetail plate within said carriage.

9. The night vision system of claim 8, wherein said mounting means further comprises:

a frame conforming to the shape of the visor of said helmet worn by said operator, and carrying said carriage in a central portion of said frame, and means for attaching said frame to said helmet.

10. The night vision system of claim 9, wherein said attaching means further comprises:

a plurality of adjustable cushions frictionally mounted on said frame and engaging said visor;

an adjustable strap having a left and right portion attaching to said frame at left and right attachment points respectively, and a rear portion joining to said left and right portions relative to the top of said helmet; and

a hook provided at the end of said rear portion to engage the back of said helmet.

11. The night vision system of claim 10, wherein each of said adjustable cushions further comprises a sleeve portion gripping said frame, a retaining portion pivoting from said sleeve portion and engaging said visor, and a pin securing said retaining portion to said sleeve portion.

12. The night vision system of claim 11, wherein:

said sleeve portions are generally C-shaped, having an internal surface which conforms to and frictionally engages said frame, an exterior surface having a substantially flat portion and a pair of half-moon shaped posts protruding outward from said exterior surface on opposite sides of said flat portion;

said retaining portions comprise a pair of retaining walls joined by a substantially flat base and a pair of semicircular tabs extending below said base substantially parallel to said walls, said tabs each having an opening in the center and a notch at the bottom, said posts engaging said openings enabling said retaining portions to pivot relative said sleeve portions with pivotal travel limited by contact between said base and said flat portion of said sleeve portions; and

said pin is generally C-shaped, having ends which extend outwardly from the part of said openings left unoccupied by said half-moon posts, traveling downward along said tabs to engage said notches.

13. The night vision system of claim 12, wherein said frame comprises a substantially hollow metallic tube having sealed ends and a black oxide finish.

14. The night vision system of claim 13, wherein said left and right attachment points comprise elongated wire loops having ends folded inward and an intermediate portion welded to said frame, said left and right straps having ends which wrap around said frame and wire loop combinations with said folded ends enveloping the sides of said straps to preclude lateral movement of said straps relative said frame.

15. The night vision system of claim 14, wherein said hook is substantially J-shaped having an elongated back wall, a slot spanning said back wall, a hook wall having a beveled edge, and a base joining said back wall and said hook wall, said rear portion of said strap feeding through said slot and fastening to itself along the length of said rear portion.

16. The night vision system of claim 15, wherein said frame has a pair of parallel support bars extending outwardly relative the operator from the center portion of said frame, each of said bars having a sawtooth track disposed thereon;

whereby, said carriage travels on said support bars and cooperates with said track to remain secured in a desired position.

17. The night vision system of claim 8, further comprising means for adjusting the azimuth of said system relative the operator'"'"'s eye, comprising a tab disposed in each of said first surface and said second surface, an arcuate slot in the underside of each of said mounting plates and engaging said tabs, and an 0-ring positioned between a respective one of said surfaces and said dovetail mounting plates, said mounting plates being rotatable along an arc of travel relative said surfaces with the ends of said slots providing rotation limit stops.

18. The night vision system of claim 8, wherein said control housing is generally triangular with rounded edges and is of a size and weight conducive to grasping with an operator'"'"'s single hand for use as a pocketscope.

19. The night vision system of claim 8, wherein said control housing further comprises an attachment flange which connects to said optical portion and an internal passageway for routing of electrical wiring between said control housing and said optical portion.

20. The night vision system of claim 8, further comprising an illuminator means for momentarily illuminating the field of view of said optical portion with infra-red light, and a switch spring biased to the "off" position for energizing said illuminator means.

21. The night vision system of claim 20, wherein said illuminator means further comprises:

an infra-red emitting diode mounted on a forward surface of said control housing, said diode capable of projecting a cone of infra-red light into an area corresponding with said field of view; and

said spring biased switch is mounted on said control housing and is electrically connected to said diode to energize said diode only by the intentional manipulation of said switch against its bias, said switch returning to a position de-energizing said diode upon release of said switch.

22. The night vision system of claim 21, further comprising an indicator means for indicating to the operator that said diode is energized.

23. The night vision system of claim 22, wherein said indicator means further comprises:

a light-emitting diode (LED), and a means for mounting said LED on an interior portion of said optical portion.

24. The night vision system of claim 23, wherein said LED is illuminated when said infra-red emitting diode is energized, said LED being visible to said operator when looking through said optical portion.

25. The night vision system of claim 24, wherein said LED mounting means further comprises a substantially flexible mylar tape.

26. The night vision system of claim 21, further comprising means for indicating to the operator that said battery has dropped below a minimum power.

27. The night vision system of claim 26, wherein said battery indicating means further comprises:

a light-emitting diode (LED), and a means for mounting said LED on an interior portion of said optical portion.

28. The night vision system of claim 27, wherein said LED is illuminated when said battery power has dropped below said minimum amount, and said LED is visible to said operator when looking through said optical portion.

29. The night vision system of claim 28, wherein said LED mounting means further comprises a substantially flexible mylar tape.

30. The night vision system of claim 25, further comprising an indicator means for indicating to the operator that said diode is energized and for indicating to the operator that electrical power to said optical portion has dropped below a minimum amount.

31. The night vision system of claim 30, wherein said indicator means further comprises:

a first light-emitting diode (LED), a second LED, and a means for mounting said first and second LEDs on an interior portion of said optical portion.

32. The night vision system of claim 31, wherein said first LED is illuminated when said infra-red emitting diode is energized, and said second LED is illuminated when said electrical power has dropped below said minimum amount, said first and second LEDs being visible to said operator when looking through said optical portion.

33. The night vision system of claim 32, wherein said LED mounting means further comprises a substantially flexible mylar tape.

34. The night vision system of claim 8, further comprising means for introducing an inert gas into said control housing to prevent contamination of said internal circuitry.

35. The night vision system of claim 8, further comprising means for shutting off electrical power to said system upon removal of said system from engagement with said carriage.

36. The night vision system of claim 8, wherein each of said dovetail mounting plates have a generally trapezoidal shape, with edges converging in the direction of said eyepiece, and said carriage has a receiving portion having a shape corresponding to that of said dovetail mounting plates.

37. The night vision system of claim 36, wherein said carriage is selectively adjustable relative said frame to vary the distance between the operator and said eyepiece.

38. A night vision system, comprising:

an optical portion for receiving and intensifying an image;

a means for selectively mounting said optical portion to a face mask in either of two operational positions corresponding to a desired one of an operator'"'"'s eyes and being rapidly switchable between said operational positions;

wherein said face mask further comprises a frame partially surrounding the operator'"'"'s face, a plurality of mask plates carried by said frame and pressing against specified points of the operator'"'"'s face, and a strap affixed to said frame at a plurality of points and wrapping around the operator'"'"'s head;

whereby said mark can be firmly affixed to the operator'"'"'s head by the intentional tightening of said strap;

further comprising a control housing affixed to said optical portion and having an internal battery for powering said optical portion;

wherein said selective mounting means further comprises;

a first dovetail mounting plate affixed to a first surface of said control housing, and a second dovetail mounting plate affixed to a second surface of said control housing; and

a carriage centrally positioned on said face mask frame and configured to receive a selected one of said dovetail plates and means for securing said selected dovetail plate within said carriage.

39. The night vision system of claim 38, wherein said carriage is selectively adjustable relative said mask to vary the distance between the operator and said eyepiece.

40. The night vision system of claim 39, wherein each of said dovetail mounting plates have a generally trapezoidal shape, with edges converging in the direction of said eyepiece, and said carriage has a receiving portion having a shape corresponding to said dovetail mounting plate.

41. The night vision system of claim 38, further comprising means for adjusting the azimuth of said system relative the operator'"'"'s eye, comprising a tab disposed in each of said first surface and said second surface, an arcuate slot in the underside of each of said mounting plates and engaging said tabs, and an 0-ring positioned between a respective one of said surfaces and said dovetail mounting plates, said mounting plates being rotatable along an arc of travel relative said surfaces with the ends of said slots providing rotation limit stops.

42. The night vision system of claim 38, wherein said control housing is generally triangular with rounded edges and is of a size and weight conducive to grasping with an operator'"'"'s single hand

43. A night vision monocular comprising:

a housing at a forward end carrying an objective lens for receiving light from a scene to be imaged, said housing at an aft end including an eyepiece in which an enhanced image of said scene may be viewed, and said hosing further carrying an image intensifier tube receiving said light and producing said enhanced image;

said housing in frontal view including a portion thereof which is generally triangularly-shaped and which includes first and second mutually angulated mounting surfaces each carrying a respective quick-coupling/quick-release mounting feature;

said eyepiece being offset with respect to said first and second mounting features along a line substantially bisecting said mutual angulation between said mounting surfaces of said triangularly-shaped housing to align said eyepiece with a respective eye of a human user dependent upon which one of said mounting features is engaged with a support structure centered forwardly of an above said user'"'"'s eyes.