Patent ID: 7686462
Filing Date: 2010-03-30
Classification: H01J

Abstract:
1. An apparatus for reducing reflection on a surface of an optical lens assembly that is configured so as to have a wide field of view (FOV), said surface corresponding to an input end of the lens assembly in which is inputted light of images being viewed, said apparatus comprising: a plurality of concentric circular vanes, mounted in front of said reflective surface, each of said vanes including a first end proximate said surface, and a second end distal from said lens surface, wherein said first ends of said plurality of vanes are spaced apart from each other at a different distance than said second ends of said plurality of vanes are spaced apart from each other, and wherein said first ends of said plurality of vanes are spaced further apart from each other than said second ends of said plurality of vanes where light from an image to be viewed enters said second ends and exits said first ends and passes to said lens assembly input end; and wherein said plurality of concentric circular vanes are arranged such that light reflecting from said lens surface is essentially not viewable by an observer located distal from said second ends and so that a user viewing through the lens assembly can observe the image corresponding to the wide field of view of the lens assembly.