Back to results
US 3,941,999 AGranted
Automatic focus pulse gated system
AssigneeThe United States of America as represented by the Secretary of the Army
InventorThomas E. Moyers, Jr.
Life of this patent
Estimating the term…
Abstract
An improved active type of infrared viewing system is provided using pulse ated techniques which displays the complete Z (range) axis simultaneously and provides uniform image intensity at all ranges.
Claims8
In an image viewing system having a pulse gated image intensifier tube, an integral source of synchronized illumination, a variable delay means for said gating pulse, means to generate said gating pulse and a manually focussed objective lens, the improvement comprising:
- automatic means for continuously varying the effective focal length of said objective lens and the delay of said delay means in concert.
Dependencies are inferred from the claim text.