Patent ID: 6401589
Filing Date: 2002-06-11
Classification: F41G

Abstract:
Night vision apparatus-compatible laser beam path window apparatus comprising the combination of:a first radiant energy transparent member having loss inclusive radiant energy transmission capability in both thickness first and thickness-orthogonal second directions; a night vision apparatus receiving externally sourced input signal energy through said first radiant energy transparent member; a second radiant energy transparent member physically smaller in said thickness-orthogonal direction than said first radiant energy transparent member and having loss-inclusive radiant energy transmission capability in both thickness and thickness-orthogonal directions; said second radiant energy transparent member being coplanar received in a selected thickness-orthogonal direction region of said first radiant energy transparent member; a hand held laser member having radiant output energy directed through said second radiant energy transparent member in said thickness direction; said loss inclusive radiant energy transmission capabilities in said first and second radiant energy transparent member being capable of generating, from said thickness direction-oriented laser radiant output energy, energy loss portions having thickness and thickness-orthogonal direction components of orientation; a geometrically closed radiant energy containment member surrounding said smaller second radiant energy transparent member in said thickness-orthogonal direction and interrupting said radiant energy loss portions having a thickness-orthogonal direction component of orientation intermediate said smaller second radiant energy transparent member and said surrounding first radiant energy transparent member; said interrupting and said geometrically closed radiant energy containment member limiting radiant energy loss portion-sourced spurious energy emissions from said laser path window apparatus into said night vision apparatus to occurrence in said second radiant energy transparent member in exclusion of larger, and more disabling to said night vision apparatus, occurrences in said first radiant energy transmission member.