Patent ID: 9651719
Date: 2017-05-16
CPC Classifications: G02B,G09B

Claim:
1. A method of using night vision goggles (NVG) in a simulator system with at least one display screen, comprising the steps of: attaching to said NVG an aperture mechanism having a cone portion, wherein said aperture mechanism has a first end, a second end, an engaging portion extending from said first end toward said second end, and said cone portion extending from said engaging portion to said second end and wherein said cone portion has an aperture therethrough such that said aperture is aligned and in direct contact with a lens of said NVG; aiming said NVG in a direction of a portion of said at least one display screen; radiating an amount of light from said at least one display screen in a direction of said lens of said NVG; blocking at least a portion of said amount of light radiated in said radiating step with said aperture mechanism; and producing a focused image with said NVG; wherein said focused image is produced for multiple different portions of said at least one display screen having different object-to-goggle distances with said NVG, said multiple different portions of said at least one display screen being within a depth of field which is greater than an initial depth of field of said NVG without said attached aperture mechanism, said depth of field being a range of object-to-goggle distances, an upper bound and a lower bound of which are less than twenty feet.