Image tube power supply
Single power supply multiple image intensifier apparatus and method with independently adjustable low light gain and high light saturation level
High intensity light shut-down circuit for night vision goggle
Nonlinear optical protection against frequency agile lasers
Electromagnetic interference protection for image intensifier tube
Cathode for image intensifier tube having reduced veiling glare
Night vision system with color video camera
Image intensifier system
Gated voltage apparatus for high light resolution and bright source protection of image intensifier tube
Advanced high voltage power supply for night vision image intensifer
ApplicationNo. 712506 filed on 09/11/1996
US Classes:250/214VT, Vacuum tube type313/524With optical device
ExaminersPrimary: Allen, Stephone B.
Attorney, Agent or Firm
International ClassH01J 031/50
AbstractA night vision device enhancement wherein occurrence of a bright object in an input scene of the night vision device is precluded from adversely affecting reproduction of adjacent low radiance level portions of the input scene. By optically limiting or excluding bright object input scene portions from the night vision device input field the disclosed system precludes both image intensifier-related effects, effects such as blooming and current saturation, and also precludes automatic gain control-related effects such as full-field sensitivity decrease based on the bright object. Plural embodiments of the system are disclosed, embodiments based on bright object attenuation by both yet to be developed photo active materials such as photochromics and embodiments which use present state of the art liquid crystal materials and accompanying electronics. Military and non-military uses of the improved night vision device are contemplated.