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As an algorithm that generates a kinoform is a phase-type computer-generated hologram, there is a iterative dummy area method. However, it is to reduce the error in the original image space, using the degree of freedom in the dummy area, the dummy area method is repeated dummy area error occurs. That the error occurs in the dummy region, undesirable in terms of light use efficiency. In this study, we aim to reduce the error of the dummy area there. In the computer generated hologram, the reconstructed image is modulated by a sinc function in both the horizontal direction, vertical direction. Therefore, compared to the reconstructed image is near the center, the periphery will be dark. In the computer generated hologram, the reconstructed image is modulated by a sinc function in both the horizontal direction, vertical direction. First, instead of using the whole dummy area Thus, by going to increase the dummy area is used gradually, it is possible to concentrate on the periphery error leads to a reduction in error.

Iterative Dummy Area Method with Flexible Dummy Area Size for the Design of Kinoform