HOLOGRAPHY(1948)

GABOR CREATES THE THREE DIMENSIONAL IMAGES

Holography, coming from Greek word Holos(whole) and Grage(writing), is a form of photography that allow an image to be record in 3D which is discovered by Hungarian born Dennis Gabor (1900-976) while working for the Thomas Houston company in rugby, England ,its early development was hampered by insufficient light sources.

Gabor’s holography stored 3D images by encoding them within a beam of light, but the mercury arc lamp is used produced variable results .the invention of the laser by a team of Russian and U.S. scientist in 1960 provide pure, intense light that was ideal for creating holograph. The pulse ruby laser emits a very powerful burst of light that lasts a few nanoseconds and effectively freezes movement.

The development of the laser enabled the first experiment in optically storing and retrieving images. The first laser transmission hologram of 3D object, a toy train and the bird, occurred in 1962 .Stephen A. Benton invented white light transmission holograph in 1968, and this form finally enabled mass production Benton technique meant that, when viewed in ordinary “rainbow” image from the seven colors that make up white light

The use of holography in every form is widespread rainbow holograms are used on credit cards, artist such as Salvador Dali employed holography artistically, and holograms also appeared in some of the movies that defined the latter half of the twentieth century.

Holography works on the principle of interference. The holograms capture the interference pattern between two or more beam of coherent light it is used to test different material used in construction. Holographic films are, flexible plastic films which have been micro embossed with a holographic images pattern