Patent ID: 8355208

Claim:
A quick adjustment assembly for a head or helmet mounted display, comprising: a) an adjustment plate assembly securely attachable to the head of a user via a helmet or head gear, said adjustment plate assembly comprising a single substantially flat plate element that remains stationary with respect to the head of the user, said flat plate element extending substantially perpendicular to the helmet or head gear; and, b) an eye relief assembly mountable on said adjustment plate assembly, comprising: i. a main frame for supporting at least one image source assembly (ISA); and, ii. a pair of opposing pressure plate assemblies supported by said main frame, each pressure plate assembly including; 1. an eye relief adjustment release element engageable by the user; and, 2. at least one pressure plate friction pad assembly operatively engageable with said adjustment plate assembly to provide selectable positioning of said eye relief assembly along a plane of movement relative to said adjustment plate assembly allowing three-degrees of freedom movement along said plane of movement.