Helmet mounted image intensifier
AssigneeThe United States of America as represented by the Secretary of the Army
InventorJohn M. Hall
Life of this patent
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Abstract
A head-mounted vision enhancement system which provides crash survivabili weight, and center of gravity superior to the currently fielded image intensifier goggle arrangements. This is accomplished by positioning the goggle objective lens assembly and intensifier tube closer in around the head and then using an eyepiece to bring the image back around into the eye. Hypersteropsis is thus avoided by folding the intensifier objective lenses from the center of the forehead.
Claims2
A helmet-mounted vision enhancement system, the system having left and right side subsystems allowing the relay of an intensified image scene to the eye, the subsystems for each side comprising:
- each input subsystem including reflecting means for reflecting the field of view of the outside environment perpendicular to the normal human eye line of sight as a reflected image;
- goggle subsystem including intensifier means for focus and image intensification of the reflected image, both reflecting means and intensifier means substantially parallel to the user's forehead and facing in toward the user's nose;
- output subsystem for orienting an input image from the goggle subsystem which is accepted into relay optics and eyepiece optics so that a user can view an image intensified scene with a 1:1 magnification and restored normal image orientation onto an eyepiece, wherein the output subsystem further includes eyepieces optics constructed to provide see-through capability by coating partial mirrors to reflect only green phosphor light whereby eliminating hypersteropsis to the user, and further allowing relay of an intensified image scene to the eye with optional other superimposed images.
Dependencies are inferred from the claim text.