Night vision viewing systems

Details Night vision viewing systems Night vision viewing systems

1984-07-24

1986-01-07

Henry, Jon W.

350538, 350547, 350174, G02B 2312, G02B 2306, G02B 2318, G02B 2310

Patent

active

045630615

ABSTRACT:
A helmet mounted night vision viewing system comprising a goggle arrangement supported from above the face aperture of the helmet, the goggle comprising two independent viewing arrangements, one for each eye of a wearer of the helmet, each viewing arrangement comprising an optical projector (11, 13, 15) arranged to project an intensified image of a scene ahead of the helmet wearer downwardly to an eyepiece (17) in the form of a body of refractive material (20) in front of the wearer's eye wherein light from the optical projector is reflected at an aft surface (23), towards a curved reflective surface (25) from which the light is reflected back towards the aft surface for transmission therethrough to the wearer's eye. The optical projectors each comprise an objective lens (11), image intensifier (13) and roof prism (17), the intensifier being positioned between the objective and prism so as to allow the eyepiece to be relatively small and close to the wearer's eye in the interest of lightness and compactness, thus rendering the system suitable for use in high performance aircraft.

REFERENCES:
patent: 4124798 (1978-11-01), Thompson
Machine Design, "Scanning the Field for Ideas", vol. 52 (1980) p. 36, Aug. 1980.

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