The effects of MPE (maximum permissible exposure) on the characteristics of electro-holographic displays are analyzed. The main effect is the reduction in the spectral range to be presented by the displays. The range will be reduced more as the pixel and hologram sizes of the displays become smaller and larger, respectively. The spectral range for the hologram size 0.5m and pixel size 0.8µm will be about 50nm less than that of the visible. In addition to the spectral range, the reconstructed image size should not be smaller than the value defined by 0.1 times of the diffracted intensity of the image to meet the MPE requirement for eye.
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