78272571
Jul 10, 2003
Optical apparatus, namely, simulator screen, namely, an optical member which may be mounted in front of a model or other image source to vary the apparent distance and perspective of the image source for use in military and civilian aircraft simulation; an infinity visual display system comprised of focusing optics for presenting an image at infinity or closer or at minus infinity of an object image not at infinity for use in military and civilian aircraft simulation
Electrical and Scientific Apparatus