Some Kaleidoscopes dispense with object boxes and use lens to throw images of distant objects on mirrors, eyepiece viewing eyehole then being advantage. The number of combinations and patterns is effectively without limit. When the box is turned or tap, objects inside tumble into arbitrary grouping, and when the diffusing screen is illuminate, sixfold or eightfold multiplication creates a striking symmetrical pattern. In this box are pieces of coloured glass, tinsel, or beads. At the other end is a thin, flat box that can be rotate it is made from two glass disks, outer one ground to act as a diffusing screen. Mirrors are enclose in tube with viewing eyehole at one end. A simple Kaleidoscope consists of two thin, wedge - shaped mirror strips touching along common edge or of single sheet of bright aluminum bent to an angle of 60 or 45. If mirrors are inclined at 60, hexagonally symmetrical pattern results from one object producing six regularly placed images. Each of these mirror images is in turn reflected in other mirror, forming the appearance of four symmetrically placed objects. If an object is placed between two mirrors incline at right angles, image is formed in each mirror. Sell usually as a toy, Kaleidoscope also has value for pattern designer.S Kaleidoscope illustrates image - forming properties of combine, inclined mirrors. The kaleidoscope was invented by Sir David Brewster about 1816 and patented in 1817. The name is derived from Greek words kalos, eidos, and skopein. Design may be changed endlessly by rotating sections containing loose fragments. Kaleidoscope, optical device consisting of mirrors that reflect images of bits of coloured glass in symmetrical geometric design through the viewer.
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