초록 ▼

An object intended for concealment or a facsimile thereof is used to generate the pattern by creating shadows on a flat surface at several elevation angles, with the resulting set of shapes then rotated in azimuth, in order to produce an abundance of quasi-object shapes within the pattern. The shape

An object intended for concealment or a facsimile thereof is used to generate the pattern by creating shadows on a flat surface at several elevation angles, with the resulting set of shapes then rotated in azimuth, in order to produce an abundance of quasi-object shapes within the pattern. The shapes are created in such a way as to be viewing-angle independent, thus producing a background upon which the object is difficult to see from any viewing angle. Selected azimuth and/or elevation angles can also be employed, resulting in patterns that are viewing-angle dependent.

대표청구항 ▼

The method of producing a deception pattern, using a unit which is the object intended for concealment or a facsimile thereof, comprising: placing said unit on a flat surface; placing a point source of light at a point which has a chosen elevation and azimuth angle, and a sufficient distance from sa

The method of producing a deception pattern, using a unit which is the object intended for concealment or a facsimile thereof, comprising: placing said unit on a flat surface; placing a point source of light at a point which has a chosen elevation and azimuth angle, and a sufficient distance from said unit that rays of light from the point striking the unit will be substantially non-divergent, thereby creating a shadow on the flat surface which is then copied in detail; changing at least one of said angles in a systematic manner; and repeating said copying step for each selected angle, to produce a family of shapes that are sensitive to changes in viewing angle.