Methods and apparatus for making holograms including multiple tw

Optical: systems and elements – Holographic system or element – Hardware for producing a hologram

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359 1, 359 22, 359 23, 359 24, 359 30, 359 35, G03H 104

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active

061511439

ABSTRACT:
A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.

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