Optical display device

Claim 1

An optical display device comprising: a housing having one open side; Fresnel lens means having the optical property of a convex lens having a focal length f, said fresnel lens means mounted in said one open side of said housing; illuminating means positioned within said housing for illuminating a three-dimensional object; motor means secured to the top of said housing and having a shaft extending downwardly therefrom; a transverse member extending substantially horizontally from said shaft means and secured thereto, and a substantially non-light reflective member extending downwardly from said transverse member and secured thereto; a three-dimensional object suspended from said non-light reflective member; said three-dimensional object and said lens being relatively positioned for directing a portion of the light from said illuminating means reflected off the three-dimensional object through one side of said lens, said object being disposed from said lens at a distance greater than said lens focal lens f, the length of the path travelled by said light portion from said three-dimensional object to said lens being greater than said lens focal lens f, whereby a real image of said three-dimensional object is formed in space on the other side of said lens, said real image giving the visual effect of said three-dimensional object being suspended in space; said motor means cooperating with said shaft means, said transverse member, and non-light reflective member to impart transverse and rotational motion to said object; said motor means imparting periodic motion to said object in a path having a major component substantially on the axis of said lens, whereby the size of said real image increases and decreases as the object moves along the axis of said lens without substantial movement of said object on said axis.