Iterative Dummy Area Method with Flexible Dummy Area Size for the Design of Kinoform
AbstractAs an algorithm that generates a kinoform which is a kind of phase-type computer-generatedhologram, there is an iterative dummy area method. However, this algorithm produces the error in dummy area,because it reduces the error in the original image space using the degree of freedom in the dummy area. It isundesirable for an error to occur in the dummy area in use efficiency of the light. In this study, we aim to reducethe error in the dummy area. In the computer generated hologram, the reconstructed image is modulated by asinc function in both the horizontal direction, vertical direction. Therefore, the peripheral part of reconstructedimage darkens in comparison with center. From this, we use only a peripheral part at the start as a dummy areaand widen a range to gradually use as a dummy area. By this method, we can collect errors in the peripheralpart.
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