Patent ID: 6809891
Filing Date: 2004-10-26
Classification: G02B

Abstract:
An image display device for projecting a projected image in front of the image display device in an image bubble that can be viewed from a wide viewing area, the display device comprising:a luminous image source for providing a luminous image that will form the projected image; a housing having an internal chamber that contains the luminous image source, the housing having a lens aperture; and a lens assembly mounted to cover the lens aperture, the lens assembly being spaced apart from the luminous image source for projecting the luminous image outside of the internal chamber and beyond the lens assembly to appear as the image bubble that includes the projected image, the lens assembly including a first lens having a first focal surface and an opposing first flat surface that together provide a first focal length, the first lens being spaced a distance from the luminous image source such that the first flat surface is facing the luminous image source and generally normal to light being projected from the luminous image source, the lens assembly further including a second lens that includes a second focal surface and an opposing second flat surface that together provide a second focal length, the second focal surface being adjacent the first focal surface, and wherein the first focal length is approximately one-half of the second focal length.