DETAILED DESCRIPTION The present invention relates to a new art form which includes the use of Moire patterns applied in dual or multiple layers with or without spatial separation between layers.
The pictures produced may be easily changed by pattern substitution, color application, or lighting modification.
Changing images are created by mounting a transparent pattern over a dissimilar opaque or tranparent pattern or etching, either spatially separated or in surface to surface contact.
The patterns coact to produce interference lines of differing intensities which in turn creates a visual image which will change when the viewing angle is changed, or, in the case of the contact images, when the primary pattern is moved or a different pattern is substituted therefor.
The family of curves which can now be computer generated will, when displayed in accordance herewith, create interesting optical efforts.
Furthermore, some curves even when generated by the same equation, will always be slightly dissimilar (one compared to another) because of the mechanistic nature of the reproduction by the printer.
The manipulation and positioning of the various geometric patterns which may be produced and printed or drawn, either on opaque or transparent media, as will appear, form the basis for the present invention.
The display formed by assembling various patterns in accordance herewith may be hung, or if desired, readily changed by adding a different configuration on a transparency to the assemblage, by exchanging one of the existing panels for a panel bearing a different pattern, or by varying the distance and/or angular relationship between adjacent panels.
Furthermore, other interesting visual effects in shading and line or curve emphasis may be obtained by the use of various primary colors, either in the background and/or in the lines forming the image.
Of course, additional variations and enhancement may be had through the use of appropriate interior or exterior lighting, with or without light and color movement, in association with the finished art work
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Optical Systems 
