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Appl Opt. 2002 Jul 10;41(20):4140-7.

Optical shifter for a three-dimensional image by use of a gradient-index lens array.

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  • 1NHK, Science and Technical Research Laboratories, Tokyo, Japan.


We propose a new function of the two-dimensional lens array that is composed of many gradient-index lenses. The array forms three-dimensional (3D) images. The characteristics of the 3D images depend on the length of the gradient-index lens. Especially, if the length of the lens is an odd-integer multiple of the half period of the optical path, 3D images are pseudoscopic with a reversed depth. The two lens arrays are positioned at a suitable distance, so that orthoscopic 3D images with the correct depth are formed in front of the lens array.

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